cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Iron K Features in the Quasar E 1821+643: Evidence for Gravitationally Redshifted Absorption?
Creators: name: Yaqoob, T.
name: Serlemitsos, P. J.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: We report a Chandra high-energy grating detection of a narrow, redshifted absorption line superimposed on the red wing of a broad Fe K line in the $z=0.297$ quasar E1821+643. The absorption line is detected at a confidence level, estimated by two different methods, in the range ~2-3 sigma. Although the detection significance is not high enough to exclude a non-astrophysical origin, accounting for the absorption feature when modeling the X-ray spectrum implies that the Fe-K emission line is broad, and consistent with an origin in a relativistic accretion disk. Ignoring the apparent absorption feature leads to the conclusion that the Fe-K emission line is narrower, and also affects the inferred peak energy of the line (and hence the inferred ionization state of Fe). If the absorption line (at ~6.2 keV in the quasar frame) is real, we argue that it could be due to gravitationally redshifted Fe XXV or Fe XXVI resonance absorption within ~10-20 gravitational radii of the putative central black hole. The absorption line is not detected in earlier low-energy grating observations, but is not unequivocally ruled out by these data. The Chandra high-energy grating Fe K emission line is consistent with an origin predominantly in Fe I-XVII or so. In a previous LEG observation the line was double-peaked, at ~6.4 keV and ~6.9 keV (H-like Fe). Such a wide range in ionization state of Fe is not ruled out by the HEG data and an earlier ASCA observation, and is suggestive of a complex structure for the line-emitter.
description: To be published in the Astrophysical Journal, 20 April 2005. 18 pages, ten figures, five of them in color. Four tables. Abstract is abridged.Corrected typos in author affiliation superscripts
Search for new phenomena in final states with $b$-jets and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
Creators: name: ATLAS Collaboration
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The results of a search for new phenomena in final states with $b$-jets and missing transverse momentum using 139 fb$^{-1}$ of proton-proton data collected at a centre-of-mass energy $\sqrt{s} = 13$ TeV by the ATLAS detector at the LHC are reported. The analysis targets final states produced by the decay of a pair-produced supersymmetric bottom squark into a bottom quark and a stable neutralino. The analysis also seeks evidence for models of pair production of dark matter particles produced through the decay of a generic scalar or pseudoscalar mediator state in association with a pair of bottom quarks, and models of pair production of scalar third-generation down-type leptoquarks. No significant excess of events over the Standard Model background expectation is observed in any of the signal regions considered by the analysis. Bottom squark masses below 1270 GeV are excluded at 95% confidence level if the neutralino is massless. In the case of nearly mass-degenerate bottom squarks and neutralinos, the use of dedicated secondary-vertex identification techniques permits the exclusion of bottom squarks with masses up to 660 GeV for mass splittings between the squark and the neutralino of 10 GeV. These limits extend substantially beyond the regions of parameter space excluded by similar ATLAS searches performed previously.
description: 49 pages in total, author list starting page 34, 10 figures, 7 tables, published in JHEP 05 (2021) 093. All figures including auxiliary figures are available a https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-34/
Lexical and sentence elicitation
Creators: name: Mucushua, Juan
name: Escamilla, Ramón
name: Michael, Lev
name: Piqueras-Brunet, Marta
name: Beier, Christine
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: anb

description: Contains four WAV audio files:
20090615_anb_md_01: 28m group elicitation; Juan Mucushua.
20090615_anb_md_02: 1h 23m group elication; Juan Mucushua.
20090615_anb_md_03: 26m group elicitation; Juan Mucushua.
20090615_anb_md_04: 24m group elicitation; Juan Mucushua.
Intermodular Configuration Scrubbing of On-detector FPGAs for the ARICH at Belle II
Creators: name: Giordano, R.
name: Lai, Y.
name: Korpar, S.
name: Pestotnik, R.
name: Lozar, A.
name: Santelj, L.
name: Shoji, M.
name: Nishida, S.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: On-detector digital electronics in High-Energy Physics experiments is increasingly being implemented by means of SRAM-based FPGA, due to their capabilities of reconfiguration, real-time processing and multi-gigabit data transfer. Radiation-induced single event upsets in the configuration hinder the correct operation, since they may alter the programmed routing paths and logic functions. In most trigger and data acquisition systems, data from several front-end modules are concentrated into a single board, which then transmits data to back-end electronics for acquisition and triggering. Since the front-end modules are identical, they host identical FPGAs, which are programmed with the same bitstream. In this work, we present a novel scrubber capable of correcting radiation-induced soft-errors in the configuration of SRAM-based FPGAs by majority voting across different modules. We show an application of this system to the read-out electronics of the Aerogel Ring Imaging CHerenkov (ARICH) subdetector of the Belle2 experiment at SuperKEKB of the KEK laboratory (Tsukuba, Japan). We discuss the architecture of the system and its implementation in a Virtex-5 LX50T FPGA, in the concentrator board, for correcting the configuration of up to six Spartan-6 LX45 FPGAs, on pertaining front-end modules. We discuss results from fault-injection and neutron irradiation tests at the TRIGA reactor of the Jozef Stefan Institute (Ljubljana, Slovenia) and we compare the performance of our solution to the Xilinx Soft Error Mitigation controller.
description: "Accesso Aperto MIUR". This work has been partly funded by the ROAL project (grant no. RBSI14JOUV) of the SIR 2014 program of MIUR. Corresponding author: R. Giordano (email: raffaele.giordano@unina.it)
The Nature of Dark Matter
Creators: name: Kirillov, A. A.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: The observed strong dark-to-luminous matter coupling suggests the existence of a some functional relation between visible and DM sources which leads to biased Einstein equations. We show that such a bias appears in the case when the topological structure of the actual Universe at very large distances does not match properly that of the Friedman space. We introduce a bias operator $ρ_{DM} = B ρ_{vis}$ and show that the simple bias function $b \~1/r^{2}$ (the kernel of $B$) allows to account for all the variety of observed DM halos in astrophysical systems. In galaxies such a bias forms the cored DM distribution with the radius $R_{C}\sim R_{opt}$ (which explains the recently observed strong correlation between $R_{C}$ and $R_{opt}$), while for a point source it produces the logarithmic correction to the Newton's potential (which explains the observed flat rotation curves in spirals). Finally, we show that in the theory suggested the galaxy formation process leads to a specific variation with time of all interaction constants and, in particular, of the fine structure constant.
description: 12 pages, essential revision
Coherent permutations with descent statistic and the boundary problem for the graph of zigzag diagrams
Creators: name: Gnedin, Alexander
name: Olshanski, Grigori
Publisher: name: arXiv
Year: 2005
Subjects: subject: Combinatorics (math.CO)
subject: Probability (math.PR)
subject: FOS: Mathematics
subject: 05E99; 60C05; 06A05

description: The graph of zigzag diagrams is a close relative of Young's lattice. The boundary problem for this graph amounts to describing coherent random permutations with descent-set statistic, and is also related to certain positive characters on the algebra of quasi-symmetric functions. We establish connections to some further relatives of Young's lattice and solve the boundary problem by reducing it to the classification of spreadable total orders on integers, as recently obtained by Jacka and Warren.
description: Version 2: more detailed exposition, 4 references added, page format changed, 44 pp.; accepted in IMRN
Evidence of galaxy interaction in the Narrow-line Seyfert 1 galaxy IRAS17020+4544 seen by NOEMA
Creators: name: Salomé, Q.
name: Longinotti, A. L.
name: Krongold, Y.
name: Feruglio, C.
name: Chavushyan, V.
name: Vega, O.
name: García-Burillo, S.
name: Fuente, A.
name: Olguín-Iglesias, A.
name: Patiño-Álvarez, V. M.
name: Puerari, I.
name: Robleto-Orús, A.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: The narrow-line Seyfert 1 galaxy IRAS17020+4544 is one of the few sources where both an X-ray ultra-fast outflow and a molecular outflow were observed to be consistent with energy conservation. However, IRAS17020+4544 is less massive and has a much more modest active galactic nucleus (AGN) luminosity than the other examples. Using recent CO(1-0) observations with the NOrthern Extended Millimeter Array (NOEMA), we characterised the molecular gas content of the host galaxy for the first time. We found that the molecular gas is distributed into an apparent central disc of 1.1x10^9 Msun, and a northern extension located up to 8 kpc from the centre with a molecular gas mass M_H2~10^8 Msun. The molecular gas mass and the CO dynamics in the northern extension reveal that IRAS 17020+4544 is not a standard spiral galaxy, instead it is interacting with a dwarf object corresponding to the northern extension. This interaction possibly triggers the high accretion rate onto the super massive black hole. Within the main galaxy, which hosts the AGN, a simple analytical model predicts that the molecular gas may lie in a ring, with less molecular gas in the nuclear region. Such distribution may be the result of the AGN activity which removes or photodissociates the molecular gas in the nuclear region (AGN feedback). Finally, we have detected a molecular outflow of mass M_H2=(0.7-1.2)x10^7 Msun in projection at the location of the northern galaxy, with a similar velocity to that of the massive outflow reported in previous millimeter data obtained by the Large Millimeter Telescope.
description: Published in MNRAS, Volume 501, Issue 1, Pages 219-228
Quantum calculation of Coulomb reorientation and near-barrier fusion
Creators: name: Simenel, Cédric
name: Bender, Michael
name: Chomaz, Philippe
name: Duguet, Thomas
name: De France, Gilles
Publisher: name: arXiv
Year: 2006
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the role of deformation on the fusion probability around the barrier using the Time-Dependent Hartree-Fock theory with a full Skyrme force. We obtain a distribution of fusion probabilities around the nominal barrier due to the different contributions of the various orientations of the deformed nucleus at the touching point. It is also shown that the long range Coulomb reorientation reduces the fusion probability around the barrier.
description: 6pages, 2 figures. Proceeding of FUSION06
Generating Function for Tensor Network Diagrammatic Summation
Creators: name: Tu, Wei-Lin
name: Wu, Huan-Kuang
name: Schuch, Norbert
name: Kawashima, Naoki
name: Chen, Ji-Yao
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The understanding of complex quantum many-body systems has been vastly boosted by tensor network (TN) methods. Among others, excitation spectrum and long-range interacting systems can be studied using TNs, where one however confronts the intricate summation over an extensive number of tensor diagrams. Here, we introduce a set of generating functions, which encode the diagrammatic summations as leading order series expansion coefficients. Combined with automatic differentiation, the generating function allows us to solve the problem of TN diagrammatic summation. We illustrate this scheme by computing variational excited states and dynamical structure factor of a quantum spin chain, and further investigating entanglement properties of excited states. Extensions to infinite size systems and higher dimension are outlined.
description: v1: 6 pages, 2 figures. v2: published version
A coherent study of $χ_{c0,2}\to VV$, $PP$ and $SS$
Creators: name: Zhao, Qiang
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate the decays of $χ_{c0,2}$ into vector meson pairs ($VV$), pseudoscalar pairs ($PP$), and scalar pairs ($SS$) in a general factorization scheme. The purpose is to clarify the role played by the OZI-rule violations and SU(3) flavour breakings in the decay transitions, and their correlations with the final state meson wavefunctions. For $χ_{c0,2}\to VV$ and $PP$, we obtain an overall self-contained description of the experimental data. Applying this factorization to $χ_{c0}\to f_0^i f_0^j$, where $i, j=1, 2, 3$ denotes $f_0(1710)$, $f_0(1500)$ and $f_0(1370)$, respectively, we find that specific patterns will arise from the model predictions for the decay branching ratio magnitudes, and useful information about the structure of those three scalars can be abstracted.
description: Revtex, 8 pages, 3 figures; Typos corrected, version accepted by Phys. Rev. D
Scalar perturbations of black holes in Jackiw-Teitelboim gravity
Creators: name: Bhattacharjee, Srijit
name: Sarkar, Subhodeep
name: Bhattacharyya, Arpan
Publisher: name: arXiv
Year: 2020
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study linear scalar perturbations of black holes in two-dimensional (2D) gravity models with a particular emphasis on Jackiw-Teitelboim (JT) gravity. We obtain an exact expression of the quasinormal mode frequencies for single horizon black holes in JT gravity and then verify it numerically using the Horowitz-Hubeny method. For a 2D Reissner-Nordström like solution, we find that the massless scalar wave equation reduces to the confluent Heun equation using which we calculate the Hawking spectra. Finally, we consider the dimensionally reduced Bañados-Teitelboim-Zanelli (BTZ) black hole and obtain the exterior and interior quasinormal modes. The dynamics of a scalar field near the Cauchy horizon mimics the behavior of the same for the usual BTZ black hole, indicating a possible violation of the strong cosmic censorship conjecture in the near extreme limit. However, quantum effects seem to rescue strong cosmic censorship.
description: 16 pages, 3 figures, two-column revtex-4 format. Minor changes in the abstract, introduction and discussion, appendix and references added, typos corrected. Published in Physical Review D
Collectivity in large and small systems formed in ultrarelativistic collisions
Creators: name: Bhalerao, Rajeev S
Publisher: name: arXiv
Year: 2020
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Collective flow of the final-state hadrons observed in ultrarelativistic heavy-ion collisions or even in smaller systems formed in high-multiplicity pp and p/d/$^3$He-nucleus collisions is one of the most important diagnostic tools to probe the initial state of the system and to shed light on the properties of the short-lived, strongly-interacting many-body state formed in these collisions. Limited, in the initial years, to the study of mainly the directed and elliptic flows -- the first two Fourier harmonics of the single-particle azimuthal distribution -- this field has evolved in recent years into a much richer area of activity. This includes not only higher Fourier harmonics and multiparticle cumulants, but also a variety of other related observables, such as the ridge seen in two-particle correlations, flow decorrelation, symmetric cumulants and event-plane correlators which measure correlations between the magnitudes or phases of the complex flows in different harmonics, coefficients that measure the nonlinear hydrodynamic response, statistical properties, such as the non-Gaussianity of the flow fluctuations, etc. We present a Tutorial Review of the modern flow picture and the various aspects of the collectivity -- an emergent phenomenon in quantum chromodynamics.
description: Invited review article for EPJ ST, pedagogical review article, 34 pages, 14 Figs, 14 Exercises, comments welcome
Functional renormalization for Bose-Einstein Condensation
Creators: name: Floerchinger, S.
name: Wetterich, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Superconductivity (cond-mat.supr-con)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate Bose-Einstein condensation for interacting bosons at zero and nonzero temperature. Functional renormalization provides us with a consistent method to compute the effect of fluctuations beyond the Bogoliubov approximation. For three dimensional dilute gases, we find an upper bound on the scattering length a which is of the order of the microphysical scale - typically the range of the Van der Waals interaction. In contrast to fermions near the unitary bound, no strong interactions occur for bosons with approximately pointlike interactions, thus explaining the high quantitative reliability of perturbation theory for most quantities. For zero temperature we compute the quantum phase diagram for bosonic quasiparticles with a general dispersion relation, corresponding to an inverse microphysical propagator with terms linear and quadratic in the frequency. We compute the temperature dependence of the condensate and particle density n, and find for the critical temperature T_c a deviation from the free theory, Delta T_c/T_c = 2.1 a n^{1/3}. For the sound velocity at zero temperature we find very good agreement with the Bogoliubov result, such that it may be used to determine the particle density accurately.
description: 21 pages, 16 figures. Reference added
Students’ perspectives of work experience : inquiring into a fashion design and merchandising career preparation program
Creators: name: Ho, Nina Pei-Yun
Publisher: name: University of British Columbia
Year: 2009

description: Career preparation programs in British Columbia high schools have gained prominence in the last decade and as a career preparation teacher for Fashion Design and Merchandising, I began to wonder what motivates students to participate in such programs. Most published literature on career preparation programs have focused on benefits to education and industry, but few of these studies look at work experience from the students' perspectives. This thesis gives voice to nine students' perspectives in a Fashion Design and Merchandising Career Preparation Program's work experience placements. Career preparation programs are an explicit linkage between high school and postsecondary studies. The work experience component of career programs has allowed students to work in a variety of work placements within the fashion industry, thus providing insights into the various careers available within this diverse industry. Work experience enables schools to access facilities and resources in the community that provide students with experiences they otherwise might not have. Work experience is the bridge between school and the work world. The nine student participants are my students and I have a very close relationship with them. Visiting students during their work experience placements and getting their reactions is part of my regular teaching duties as a work experience supervisor teacher. As I visited the students during their placements, I hoped to gain some insights into what motivates students to participate in work experience programs. What do they perceive is the purpose of work experience and do work experience placements meet their expectations? I collected their impressions through formal interviews, which were tape recorded, as well as informal conversations, classroom discussions, journal entries and students' work experience information logs. The data are presented as descriptive narratives, is important for pedagogy because it functions as experiential case material on which pedagogic reflection is possible. All nine students in the study found participation in work experience to be very beneficial and they gave many positive reasons for participating in work experience. Prior to their work experience, only three of the nine students had part-time jobs. The students felt that they developed many relevant skills such as occupational-specific skills, self-reliance and employability skills working with professionals in this program. They have gained insight, knowledge and first hand experience about the apparel industry through working with professionals. Implications are drawn for improving the program and for further research.
Implementation of a radial disk ionization profile in the RELXILL_NK model
Creators: name: Abdikamalov, Askar B.
name: Ayzenberg, Dimitry
name: Bambi, Cosimo
name: Liu, Honghui
name: Zhang, Yuexin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Very steep reflection emissivity profiles in the inner part of accretion disks are commonly found in the analysis of X-ray observations of black hole binaries and AGN, but there is some debate about their exact origin. While steep reflection emissivity profiles can be naturally produced by compact coronae close to black holes, the measured radial emissivity parameter can be further increased by the radial disk ionization profile when the theoretical model assumes a disk with constant ionization. In this paper, we implement the possibility of a radial disk ionization profile in the reflection model RELXILL_NK, which is a package designed to calculate reflection spectra of "deformed" Kerr black holes. We analyze a NuSTAR observation of the black hole binary EXO 1846-031, which was previously found to have a very high inner emissivity index. We find that the model with a radial disk ionization profile improves the fit, but the impact on the estimate of the black hole spin parameter and on the constraint of the deformation parameter is modest. However, we show that the analysis of future observations of Athena and eXTP will necessarily require models with a radial disk ionization profile to have accurate constraints of the deformation parameters.
description: 9 pages, 6 figures. v2: refereed version
Yang-Baxter maps and symmetries of integrable equations on quad-graphs
Creators: name: Papageorgiou, Vassilios G.
name: Tongas, Anastasios G.
name: Veselov, Alexander P.
Publisher: name: arXiv
Year: 2006
Subjects: subject: Quantum Algebra (math.QA)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: A connection between the Yang-Baxter relation for maps and the multi-dimensional consistency property of integrable equations on quad-graphs is investigated. The approach is based on the symmetry analysis of the corresponding equations. It is shown that the Yang-Baxter variables can be chosen as invariants of the multi-parameter symmetry groups of the equations. We use the classification results by Adler, Bobenko and Suris to demonstrate this method. Some new examples of Yang-Baxter maps are derived in this way from multi-field integrable equations.
description: 20 pages, 5 figures
Discrepancy between power radiated and the power loss due to radiation reaction for an accelerated charge
Creators: name: Singal, Ashok K.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: We examine here the discrepancy between the radiated power, calculated from the Poynting flux at infinity, and the power loss due to radiation reaction for an accelerated charge. It is emphasized that one needs to maintain a clear distinction between the electromagnetic power received by distant observers and the mechanical power loss undergone by the charge. In literature both quantities are treated as almost synonymous, the two in general could, however, be quite different. It is shown that in the case of a periodic motion, the two formulations do yield the power loss in a time averaged sense to be the same, even though, the instantaneous rates are quite different. It is demonstrated that the discordance between the two power formulas merely reflects the difference in the power going in self-fields of the charge between the retarded and present times. In particular, in the case of a uniformly accelerated charge, power going into the self-fields at the present time is equal to the power that was going into the self-fields at the retarded time plus the power going in acceleration fields, usually called radiation. From a comparison of the far fields with the instantaneous location of the uniformly accelerated charge, it is shown that all its fields, including the acceleration fields, remain around the charge and are not {\em radiated away} from it.
description: 16 pages, 4 figures
Spectral Approach to Chaos and Quantum-Classical Correspondence in Quantum Mapas
Creators: name: Garcia-Mata, Ignacio
name: Saraceno, Marcos
Publisher: name: arXiv
Year: 2005
Subjects: subject: Quantum Physics (quant-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: FOS: Physical sciences

description: Correspondence in quantum chaotic systems is lost in short time scales. Introducing some noise we study the spectrum of the resulting coarse grained propagaor of density matrices. Some differen methods to compute the spectrum are reviewed. Moreover, the relationship between the eigenvalues of the coarse-grained superoperator and the classical Ruelle-Pollicott resonances is remarked. As a concequence, classical decay rates in quantum time dependent quantities appear.
description: Brief Review to appear in the April '05 Issue of Mod. Phys. Lett. B (World Scientific)
Covariant tensor formalism for partial wave analyses of $ψ$ decays into $γB\bar B$, $γγV$ and $ψ(2S)\toγχ_{c0,1,2}$ with $χ_{c0,1,2}\to K\bar K π^+π^- $ and $2π^+2π^-$
Creators: name: Dulat, Sayipjamal
name: Zou, Bing-Song
Publisher: name: arXiv
Year: 2005
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: With accumulation of high statistics data at BES and CLEO-c, many new interesting channels can get enough statistics for partial wave analysis (PWA). Among them, $ψ\to γp\bar p, γΛ\bar Λ, γΣ\barΣ, γΞ\bar Ξ$ channels provide a good place for studying baryon-antibaryon interactions; the double radiative decays $ψ\toγγV$ with $V\equiv ρ,ω,ϕ$ have a potential to provide information on the flavor content of any meson resonances (R) with positive charge parity ($C=+$) and mass above 1 GeV through $ψ\toγR \toγγV$; $ψ(2S)\toγχ_{c0,1,2}$ with $χ_{c0,1,2}\to K\bar K π^+π^- $ and $2π^+2π^-$ decays are good processes to study $χ_{cJ}$ charmonium decays. Using the covariant tensor formalism, here we provide theoretical PWA formulae for these channels.
description: 20 pages
Lexical and sentence elicitation
Creators: name: Mucushua, Juan
name: Escamilla, Ramón
name: Michael, Lev
name: Piqueras-Brunet, Marta
name: Beier, Christine
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: anb

description: Contains four WAV audio files:
20090614_anb_md_01: 44m; group elicitation; Juan Mucushua.
20090614_anb_md_02: 44m; group elicitation; Juan Mucushua.
20090614_anb_md_03: 1h 22m; group elicitation; Juan Mucushua.
20090614_anb_md_04: 55m; group elicitation; Juan Mucushua.
Presence versus absence of Two-Dimensional Fermi Surface Anomalies
Creators: name: Buterakos, Donovan
name: Vu, DinhDuy
name: Yu, Jiabin
name: Sarma, Sankar Das
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We theoretically consider Fermi surface anomalies manifesting in the temperature dependent quasiparticle properties of two-dimensional (2D) interacting electron systems, comparing and contrasting with the corresponding 3D Fermi liquid situation. In particular, employing microscopic many body perturbative techniques, we obtain analytically the leading-order and the next-to-leading-order interaction corrections to the renormalized effective mass for three distinct physical interaction models: electron-phonon, electron-paramagnon, and electron-electron Coulomb coupling. We find that the 2D renormalized effective mass does not develop any Fermi surface anomaly due to electron-phonon interaction, manifesting $\mathcal{O}(T^2)$ temperature correction and thus remaining consistent with the Sommerfeld expansion of the non-interacting Fermi function, in contrast to the corresponding 3D situation where the temperature correction to the renormalized effective mass has the anomalous $T^2 \log T$ behavior. By contrast, both electron-paramagnon and electron-electron interactions lead to the anomalous $\mathcal{O}(T)$ corrections to the 2D effective mass renormalization in contrast to $T^2 \log T$ behavior in the corresponding 3D interacting systems. We provide detailed analytical results, and comment on the conditions under which a $T^2 \log T$ term could possibly arise in the 2D quasiparticle effective mass from electron-phonon interactions. We also compare results for the temperature dependent specific heat in the interacting 2D and 3D Fermi systems, using the close connection between the effective mass and specific heat.
description: 11 pages
Classical calculation of radiative decay rates of hydrogenic Stark states
Creators: name: Horbatsch, Michael
name: Horbatsch, Marko
Publisher: name: arXiv
Year: 2020
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The Kepler-Coulomb problem is solved in parabolic coordinates and the Larmor radiation problem is analyzed to complement a previous study performed for the usual representation in spherical polar coordinates. A comparison with quantum spontaneous decay rates shows that for azimuthal quantum number $m = 0$ states only transitions to nearby $n-Δn$ principal quantum number states are described properly by the Wentzel-Kramers-Brillouin quantized classical motions, but that for $m > 0$ reasonable results emerge for many values of $Δn$. A simple approximate expression for the lifetime of $m \ne 0$ states emerges from the semi-classical analysis.
description: 37 pages, 8 figures, 44 references; revised after referee reports from J Phys B
Two electrons in a strongly coupled double quantum dot: from an artificial helium atom to a hydrogen molecule
Creators: name: Dybalski, W.
name: Hawrylak, P.
Publisher: name: arXiv
Year: 2005
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We study the formation of molecular states in a two-electron quantum dot as a function of the barrier potential dividing the dot. The increasing barrier potential drives the two electron system from an artificial helium atom to an artificial hydrogen molecule. To study this strongly coupled regime, we introduce variational wavefunctions which describe accurately two electrons in a single dot, and then study their mixing induced by the barrier. The evolution of the singlet-triplet gap with the barrier potential and with an external magnetic field is analyzed.
description: 10 pages, 11 figures, added references, extended discussion
Dynamical Entanglement
Creators: name: Gour, Gilad
name: Scandolo, Carlo Maria
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Unlike the entanglement of quantum states, very little is known about the entanglement of bipartite channels, called dynamical entanglement. Here we work with the partial transpose of a superchannel, and use it to define computable measures of dynamical entanglement, such as the negativity. We show that a version of it, the max-logarithmic negativity, represents the exact asymptotic dynamical entanglement cost. We discover a family of dynamical entanglement measures that provide necessary and sufficient conditions for bipartite channel simulation under local operations and classical communication and under operations with positive partial transpose.
description: 6+1 pages, 3 figures. Short version of arXiv:1907.02552, close to published version
The spectrum of the wavelet Galerkin operator
Creators: name: Dutkay, Dorin Ervin
Publisher: name: arXiv
Year: 2005
Subjects: subject: Functional Analysis (math.FA)
subject: FOS: Mathematics

description: We give a complete description of spectrum of the wavelet Galerkin operator $$R_{m_0,m_0}f(z)=\frac{1}{N}\sum_{w^N=z}|m_0|^2(w)f(w),\quad(z\in\m athbb{T})$$ associated to a a low-pass filter $m_0$ and a scale $N$, in the Banach spaces $C(\mathbb{T})$ and $L^{p}(\mathbb{T})$, $1\leq p\leq\infty$.
Lexical and sentence elicitation
Creators: name: Arahuanaza, Dionisia
name: Arahuanaza, Lidia
name: Mucushua, Juan
name: Sandi, María
name: Beier, Christine
name: Escamilla, Ramón
name: Michael, Lev
name: Piqueras-Brunet, Marta
name: Mucushúa, Pedro
Publisher: name: California Language Archive, University of California, Berkeley
Year: 2021
Subjects: subject: anb

description: Contains two WAV audio files:
20090613_anb_md_01.wav: 1h 37m; group elicitation; Juan Mucushua.
20090613_anb_md_02.wav: 1h 06m; group elicitation; María Sandi, Lidia Arahuanaza, Dionisia Arahuanaza, Pedro Mucushua.
Triple Higgs Boson Production at the Large Hadron Collider with Two Real Singlet Scalars
Creators: name: Papaefstathiou, Andreas
name: Robens, Tania
name: Tetlalmatzi-Xolocotzi, Gilberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We investigate the production of three Higgs bosons in the Two Real Singlet extension of the Standard Model, where the scalar sector is augmented by two additional real scalar fields which are singlets under the Standard Model gauge group. The model contains three neutral CP-even scalars, allowing for resonant production and asymmetric decay chains. We focus on the signature $p p\,\rightarrow\,h_3\,\rightarrow\,h_1\,h_2\,\rightarrow\,h_1\,h_1\,h_1$, where we identify $h_3$ as the heaviest scalar state, $h_2$ as the second heaviest and the lightest, $h_1$, as the Standard Model-like Higgs boson discovered by the Large Hadron Collider experiments. The dominant final state occurs when all three Higgs bosons decay to bottom-anti-bottom quark pairs, $h_1\,\rightarrow\,b\,\bar{b}$, leading to 6 $b$-jets. Taking into account all current theoretical and experimental constraints, we determine the discovery prospects for this channel in future runs of the Large Hadron Collider, as well as in the high-luminosity phase.
description: 29 pages, 2 figures. Matches published version
Silicon-based spin and charge quantum computation
Creators: name: Koiller, Belita
name: Hu, Xuedong
name: Capaz, R. B.
name: Martins, A. S.
name: Sarma, S. Das
Publisher: name: arXiv
Year: 2005
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Silicon-based quantum-computer architectures have attracted attention because of their promise for scalability and their potential for synergetically utilizing the available resources associated with the existing Si technology infrastructure. Electronic and nuclear spins of shallow donors (e.g. phosphorus) in Si are ideal candidates for qubits in such proposals due to the relatively long spin coherence times. For these spin qubits, donor electron charge manipulation by external gates is a key ingredient for control and read-out of single-qubit operations, while shallow donor exchange gates are frequently invoked to perform two-qubit operations. More recently, charge qubits based on tunnel coupling in P$_2^+$ substitutional molecular ions in Si have also been proposed. We discuss the feasibility of the building blocks involved in shallow donor quantum computation in silicon, taking into account the peculiarities of silicon electronic structure, in particular the six degenerate states at the conduction band edge. We show that quantum interference among these states does not significantly affect operations involving a single donor, but leads to fast oscillations in electron exchange coupling and on tunnel-coupling strength when the donor pair relative position is changed on a lattice-parameter scale. These studies illustrate the considerable potential as well as the tremendous challenges posed by donor spin and charge as candidates for qubits in silicon.
description: Review paper (invited) - to appear in Annals of the Brazilian Academy of Sciences
Distributed Kuramoto Self-Synchronization of Vehicle Speed Trajectories in Traffic Networks
Creators: name: Rodriguez, Manuel
name: Fathy, Hosam
Publisher: name: arXiv
Year: 2020
Subjects: subject: Systems and Control (eess.SY)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: This paper presents a distributed synchronization strategy for connected and automated vehicles in traffic networks. The strategy considers vehicles traveling from one intersection to the next as waves. The phase angle and frequency of each wave map to its position and velocity, respectively. The goal is to synchronize traffic such that intersecting traffic waves are out of phase at every intersection. This ensures the safe collective navigation of intersections. Vehicles share their phase angles through the V2X infrastructure, and synchronize these angles using the Kuramoto equation. This is a classical model for the self-synchronization of coupled oscillators. The mapping between phase and location for vehicles on different roads is designed such that Kuramoto synchronization ensures safe intersection navigation. Each vehicle uses a constrained optimal control policy to achieve its desired target Kuramoto phase at the upcoming intersection. The overall outcome is a distributed traffic synchronization algorithm that simultaneously tackles two challenges traditionally addressed independently, namely: coordinating crossing at an individual intersection, and harmonizing traffic flow between adjacent intersections. Simulation studies highlight the positive impact of this strategy on fuel consumption and traffic delay time, compared to a network with traditional traffic light timing.
description: 12 pages, 5 figures, submitted to IEEE Transactions on Intelligent Transportation Systems
The galaxy-halo connection of emission-line galaxies in IllustrisTNG
Creators: name: Hadzhiyska, Boryana
name: Tacchella, Sandro
name: Bose, Sownak
name: Eisenstein, Daniel J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We employ the hydrodynamical simulation IllustrisTNG-300-1 to explore the halo occupation distribution (HOD) and environmental dependence of luminous star-forming emission-line galaxies (ELGs) at $z \sim 1$. Such galaxies are key targets for current and upcoming cosmological surveys. We select model galaxies through cuts in colour-colour space allowing for a direct comparison with the Extended Baryon Oscillation Spectroscopic Survey and the Dark Energy Spectroscopic Instrument (DESI) surveys and then compare them with galaxies selected based on specific star-formation rate (sSFR) and stellar mass. We demonstrate that the ELG populations are twice more likely to reside in lower-density regions (sheets) compared with the mass-selected populations and twice less likely to occupy the densest regions of the cosmic web (knots). We also show that the colour-selected and sSFR-selected ELGs exhibit very similar occupation and clustering statistics, finding that the agreement is best for lower redshifts. In contrast with the mass-selected sample, the occupation of haloes by a central ELG peaks at $\sim$20\%. We furthermore explore the dependence of the HOD and the auto-correlation on environment, noticing that at fixed halo mass, galaxies in high-density regions cluster about 10 times more strongly than low-density ones. This result suggests that we should model carefully the galaxy-halo relation and implement assembly bias effects into our models (estimated at $\sim$4\% of the clustering of the DESI colour-selected sample at $z = 0.8$). Finally, we apply a simple mock recipe to recover the clustering on large scales ($r \gtrsim 1 \ {\rm Mpc}/h$) to within 1\% by augmenting the HOD model with an environment dependence, demonstrating the power of adopting flexible population models.
description: 19 pages, 12 figures, 2 tables; feel welcome to email
Abundant atmospheric methane from volcanism on terrestrial planets is unlikely and strengthens the case for methane as a biosignature
Creators: name: Wogan, Nicholas
name: Krissansen-Totton, Joshua
name: Catling, David C.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The disequilibrium combination of abundant methane and carbon dioxide has been proposed as a promising exoplanet biosignature that is readily detectable with upcoming telescopes such as the James Webb Space Telescope. However, few studies have explored the possibility of non-biological CH4 and CO2 and related contextual clues. Here, we investigate whether magmatic volcanic outgassing on terrestrial planets can produce atmospheric CH4 and CO2 with a thermodynamic model. Our model suggests that volcanoes are unlikely to produce CH4 fluxes comparable to biological fluxes. Improbable cases where volcanoes produce biological amounts of CH4 also produce ample carbon monoxide. We show, using a photochemical model, that high abiotic CH4 abundances produced by volcanoes would be accompanied by high CO abundances, which could be a detectable false positive diagnostic. Overall, when considering known mechanisms for generating abiotic CH4 on terrestrial planets, we conclude that observations of atmospheric CH4 with CO2 are difficult to explain without the presence of biology when the CH4 abundance implies a surface flux comparable to modern Earth's biological CH4 flux. A small or negligible CO abundance strengthens the CH4+CO2 biosignature because life readily consumes atmospheric CO, while reducing volcanic gases likely cause CO to build up in a planet's atmosphere. Furthermore, the difficulty of volcanically-generated CH4-rich atmospheres suitable for an origin of life may favor alternatives such as impact-induced reducing atmospheres.
description: Accepted by Planetary Science Journal on September 15th, 2020 and Published on October 29th, 2020
"Könnte es sein, daß wir einfach blind geworden sind für die Wirklichkeit?"
Creators: name: Raiser, Konrad
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 37 Nr. 4 (1988): Ökumenische Rundschau, Band 37, Heft 4
Learning to live in linguistic diversity : action inquiry in a secondary school
Creators: name: Chan, Judy Mae
Publisher: name: University of British Columbia
Year: 2009

description: This inquiry focused on what it means to live and learn in linguistic diversity. Using action research, I involved senior secondary students in the Social Psychology 11 classes that I taught from 1994 - 1997 in an investigation of their lived experiences and my pedagogical practices in linguistic diversity. A description of the first two cycles of this action research project are given to develop an understanding of the context which gave rise to the events and outcomes of the third cycle which is the major focus of this inquiry. The voices in tension surrounding the use of different languages by students at Central High initiated this inquiry. In reaction to this tension, I used a global perspective to remodel a traditional unit on team building, and relationships to include the question of diversity. From this remodeling, I developed specific teaching activities to address the tension caused by linguistic diversity. The three research questions that guided this research project are related to learning to live in linguistic diversity. They focused on the students' way of being in linguistic diversity, my pedagogical practice in linguistic diversity and what ways might a linguistically diverse classroom be affirming to all. Narratives and critical reflections were used to increase the understanding of the complex dynamics that are at play in linguistic diversity and to seek out ways to improve my pedagogical practices in this situation. Collaborating with students, colleagues, "critical friends" and academics enabled me to reach a better understanding of the students' lived experiences in linguistic diversity, to challenge the status quo, and to explore ways to create a more socially just classroom. Throughout this inquiry, the need to educate students to live in linguistic or other diversities bellows out loud.
Reply to "Comment on 'Analytic and Numerical Verification of the Nernst Theorem for Metals'"
Creators: name: Høye, Johan S.
name: Brevik, Iver
name: Ellingsen, Simen A.
name: Aarseth, Jan B.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Quantum Physics (quant-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: In this Reply to the preceding Comment of Klimchitskaya and Mostepanenko (cf. also quant-ph/0703214), we summarize and maintain our position that the Drude dispersion relation when inserted in the Lifshitz formula gives a thermodynamically satisfactory description of the Casimir force, also in the limiting case when the relaxation frequency goes to zero (perfect crystals).
description: 4 pages, no figures; to appear in Phys. Rev. E
Auf dem Weg zur Europäischen Ökumenischen Versammlung "Frieden in Gerechtigkeit", 15.-21. Mai 1989 in Basel
Creators: name: Deile, Volkmar
Publisher: name: Ökumenische Rundschau
Year: 2025

description: Ökumenische Rundschau, Bd. 37 Nr. 4 (1988): Ökumenische Rundschau, Band 37, Heft 4
A note on the M2-M5 brane system and fuzzy spheres
Creators: name: Berman, David S.
name: Copland, Neil B.
Publisher: name: arXiv
Year: 2006
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: This note covers various aspects of recent attempts to describe membranes ending on fivebranes using fuzzy geometry. In particular, we examine the Basu-Harvey equation and its relation to the Nahm equation as well as the consequences of using a non-associative algebra for the fuzzy three-sphere. This produces the tantalising result that the fuzzy funnel solution corresponding to Q coincident membranes ending on a five-brane has $Q^{3/2}$ degrees of freedom.
description: 17 pages, latex