cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
The Study of Optimal Ratio of Rice Flour and Germinated Brown Rice Flour (Mali Nil Surin Jasmine) in Development of Gluten Free Cake
Creators: name: Nipapond Kunna
Publisher: name: Research Division
Year: 2023
Subjects: Gluten-free cake
Rice flour
Germinated brown rice flour
Germinated jasmine Surin rice flour

description: Thai Science and Technology Journal, 31, 3, 70-85
Die Litteratur von 1901 nebst Nachträgen und Zusätzen zu Eck's Litteraturverzeichnis
Creators: name: Schütze, Ewald
Publisher: name: unkn
Year: 2021

description: Beilagen zu den Jahresheften des Vereins für Vaterländische Naturkunde in Württemberg
description: 1, 1902 (JVVNW 58, 1902)
Polarimetric signatures of hot spots in black hole accretion flows
Creators: name: Vos, Jesse
name: Moscibrodzka, Monika
name: Wielgus, Maciek
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The flaring events observed in the Sagittarius A* supermassive black hole system can be attributed to the non-homogeneous nature of the near-horizon accretion flow. Bright regions in this flow may be associated with density or temperature anisotropies, so-called "bright spot" or "hot spots". Such orbiting features may explain observations at infrared wavelengths as well as recent findings at millimeter wavelengths. In this work, we study the emission from an orbiting equatorial bright spot, imposed on a radiatively inefficient accretion flow background, to find polarimetric features indicative of the underlying magnetic field structure and other system variables including inclination angle, spot size, black hole spin, and more. Specifically, we investigate the impact of these parameters on the Stokes Q-U signatures that commonly exhibit a typical double loop (pretzel-like) structure. Our semi-analytical model, describing the underlying plasma conditions and the orbiting spot, is built within the framework of the numerical radiative transfer code ipole, which calculates synchroton emission at 230 GHz. We showcase the wide variety of Q-U loop signatures and the relation between inner and outer loops. For the vertical magnetic field topology, the inner Q-U loop is explained by the suppression of the synchrotron emission as seen by the distant observer. For the radial and toroidal magnetic field topologies, the inner \quloop corresponds to the part of the orbit where the spot it is receding with respect to the observer. Based on our models we conclude that it is possible to constrain the underlying magnetic field topology with an analysis of the Q-U loop geometry, particularly in combination with a circular polarization measurements.
description: Submitted to A&A
The spatiotemporal coupling in delay-coordinates dynamic mode decomposition
Creators: name: Bronstein, Emil
name: Wiegner, Aviad
name: Shilo, Doron
name: Talmon, Ronen
Publisher: name: arXiv
Year: 2022
Subjects: subject: Dynamical Systems (math.DS)
subject: FOS: Mathematics

description: Dynamic mode decomposition (DMD) is a leading tool for equation-free analysis of high-dimensional dynamical systems from observations. In this work, we focus on a combination of delay-coordinates embedding and DMD, i.e., delay-coordinates DMD, which accommodates the analysis of a broad family of observations. An important utility of DMD is the compact and reduced-order spectral representation of observations in terms of the DMD eigenvalues and modes, where the temporal information is separated from the spatial information. From a spatiotemporal viewpoint, we show that when DMD is applied to delay-coordinates embedding, temporal information is intertwined with spatial information, inducing a particular spectral structure on the DMD components. We formulate and analyze this structure, which we term the spatiotemporal coupling in delay-coordinates DMD. Based on this spatiotemporal coupling, we propose a new method for DMD components selection. When using delay-coordinates DMD that comprises redundant modes, this selection is an essential step for obtaining a compact and reduced-order representation of the observations. We demonstrate our method on noisy simulated signals and various dynamical systems and show superior component selection compared to a commonly-used method that relies on the amplitudes of the modes.
description: 20 pages, 17 figures
Terrace effects in grazing-incidence fast atom diffraction from a LiF(001) surface
Creators: name: Frisco, L.
name: Gravielle, M. S.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The effect produced by surface defects on grazing-incidence fast atom diffraction (GIFAD) patterns is studied by considering the presence of terraces in a LiF(001) sample. For helium atoms impinging along the <110> direction of the LiF surface, we analyze the influence of a monolayer terrace with its edge oriented parallel or perpendicular to the axial channel. We found that the presence of an outward transverse step introduces a diffuse background above the Laue circle, which displays additional peaked structures. For inward transverse steps, instead, such a background is placed below the Laue circle, showing a much weaker intensity. On the other hand, parallel steps give rise to asymmetric angular distributions, which are completely confined to the Laue circle. Therefore, these theoretical results suggest that GIFAD might be used to characterize terrace defects.
description: 9 pages, 12 figures
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data
Creators: name: Holanda, R. F. L.
name: Pereira, S. H.
name: Jain, Deepak
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: In this work, by using strong gravitational lensing (SGL) observations along with Type Ia Supernovae (Union2.1) and gamma ray burst data (GRBs), we propose a new method to study a possible redshift evolution of $γ(z)$, the mass density power-law index of strong gravitational lensing systems. In this analysis, we assume the validity of cosmic distance duality relation and the flat universe. In order to explore the $γ(z)$ behavior, three different parametrizations are considered, namely: (P1) $γ(z_l)=γ_0+γ_1 z_l$, (P2) $γ(z_l)=γ_0+γ_1 z_l/(1+z_l)$ and (P3) $γ(z_l)=γ_0+γ_1 \ln(1+z_l)$, where $z_l$ corresponds to lens redshift. If $γ_0=2$ and $γ_1=0$ the singular isothermal sphere model is recovered. Our method is performed on SGL sub-samples defined by different lens redshifts and velocity dispersions. For the former case, the results are in full agreement with each other, while a 1$σ$ tension between the sub-samples with low ($\leq 250$ km/s) and high ($>250$ km/s) velocity dispersions was obtained on the ($γ_0$-$γ_1$) plane. By considering the complete SGL sample, we obtain $γ_0 \approx 2$ and $ γ_1 \approx 0$ within 1$σ$ c.l. for all $γ(z)$ parametrizations. However, we find the following best fit values of $γ_1$: $-0.085$, $-0.16$ and $-0.12$ for P1, P2 and P3 parametrizations, respectively, suggesting a mild evolution for $γ(z)$. By repeating the analysis with Type Ia Supernovae from JLA compilation, GRBs and SGL systems this mild evolution is reinforced.
description: 11 pages, 5 figures, 1 table, text revised and new analysis included. Accepted for publication in MNRAS
Charge Symmetry Breaking Effects on Neutron Beta Decay in Non-Relativistic Quark Models
Creators: name: Crawford, Jacob W.
name: Miller, Gerald A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Theory (nucl-th)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: A formalism for the study of charge symmetry breaking (CSB) effects is discussed and used to analyze the effects of charge symmetry breaking on neutron beta decay. The effect of including CSB reduces the beta decay matrix element by an amount on the order of $10^{-4}$, a value much larger than the previous estimate. A much smaller contribution due to proton recoil is treated as well, which is found to be on the order of $10^{-6}$. The current uncertainty in the value of $V_{ud}$ is also of order $10^{-4}$. An improvement of that uncertainty by an order of magnitude would require that charge symmetry breaking effects should be included in future analyses.
description: 8 pages, submitted to add citation
Effect of Modified Rice Starch on Enhancing Survival of Probiotic Lactiplantibacillus plantarum BL60a in Synbiotic Gummy Candy Supplemented with Khao-Mak
Creators: name: Ratchanu Meidong
Publisher: name: Research Division
Year: 2023
Subjects: Probiotics
Yeast
Khao-mak
Modified rice starch

description: Thai Science and Technology Journal, 31, 3, 105-118
New anomaly observed in $^{12}$C supports the existence and the vector character of the hypothetical X17 boson
Creators: name: Krasznahorkay, A. J.
name: Krasznahorkay, A.
name: Begala, M.
name: Csatlós, M.
name: Csige, L.
name: Gulyás, J.
name: Krakó, A.
name: Timár, J.
name: Rajta, I.
name: Vajda, I.
name: Sas, N. J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Employing the $^{11}$B(p,$γ$)$^{12}$C nuclear reaction, the angular correlation of $e^+e^-$ pairs was investigated in the angular range of $40^\circΘ\leq 175^\circ$ for five different proton energies between E$_p$ = 1.50 - 2.50 MeV. At small angles ($Θ\leq 120^\circ$), the results can be well interpreted by the internal pair creation process of electromagnetic radiations with E1 and M1 multipolarities and by the external pair creation in the target backing. However, at angles greater than $120^\circ$, additional count excess and anomalies were observed, which could be well accounted for by the existence of the previously suggested hypotetical X17 particle. Our results show that the X17 particle was generated mainly in E1 radiation. The derived mass of the particle is $m_\mathrm{X}c^2$=17.03$\pm 0.11 (stat) \pm 0.20 (syst)$ MeV. According to the mass, and to the derived branching ratio ($B_x=3.6(3)\times10^{-6}$), this is likely the same X17 particle, which we recently suggested for describing the anomaly observed in the decay of $^8$Be and $^4$He.
description: 5 pages, 4 figures. arXiv admin note: text overlap with arXiv:2104.10075, arXiv:2205.07744, arXiv:1910.10459
A First Complete Algorithm for Real Quantifier Elimination in Isabelle/HOL
Creators: name: Kosaian, Katherine
name: Tan, Yong Kiam
name: Platzer, André
Publisher: name: arXiv
Year: 2022
Subjects: subject: Logic in Computer Science (cs.LO)
subject: Algebraic Geometry (math.AG)
subject: FOS: Computer and information sciences
subject: FOS: Mathematics
subject: F.3.1; F.4.1
subject: 68V20, 68V15, 03C10, 03B35, 03B10

description: We formalize a multivariate quantifier elimination (QE) algorithm in the theorem prover Isabelle/HOL. Our algorithm is complete, in that it is able to reduce any quantified formula in the first-order logic of real arithmetic to a logically equivalent quantifier-free formula. The algorithm we formalize is a hybrid mixture of Tarski's original QE algorithm and the Ben-Or, Kozen, and Reif algorithm, and it is the first complete multivariate QE algorithm formalized in Isabelle/HOL.
description: CPP 2023
Discontinuities of the quantum Fisher information and the Bures metric
Creators: name: Šafránek, Dominik
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We show that two quantities in quantum metrology that were thought to be the same, the quantum Fisher information matrix and the Bures metric, are not the same. They differ at points at which the rank of the density matrix changes. The quantum Fisher information matrix is discontinuous at these points. However, these discontinuities are removable in some sense. We show that the expression given by the Bures metric represents the continuous version of the quantum Fisher information matrix. We also derive an explicit formula for the Bures metric for both singular and non-singular density matrices.
description: 8+5 pages, 4 figures. v2: Introduction extended, larger proofs moved to the Appendix, minor corrections in proofs
Data analysis and risk factors associated with prostate cancer
Creators: name: Bernard, Apexa
Publisher: name: No Publisher Supplied
Year: 2023

description: Prostate cancer is one of the leading causes of mortality across all types of cancer. In 2022, prostate cancer had the highest incidence of new cases (268,490) and the second highest number of fatalities (34,500) in the United States Demographic, socioeconomic and lifestyle factors have been associated with prostate cancer risk and diagnosis, as well as health care, prostate specific antigen (PSA) and co-morbidities. The total cost of cancer care in the United States was estimated to be $190.2 billion in 2015 and in 2020 was projected to rise to $208.9 billion. Costs associated specifically with prostate cancer diagnosis and treatment were reported to be $11.85 billion in 2010. This study leveraged the Behavioral Risk Factor Surveillance System (BRFSS) database to examine the association between demographic, socioeconomic, lifestyle, health care, PSA factors and co-morbid conditions in relation to the risk and diagnosis of prostate cancer. Furthermore, the Healthcare Cost and Utilization Project Nationwide Inpatient Sample (HCUP-NIS) database was used to examine the association between insurance type, length of stay in the hospital, procedure type and treatment cost among prostate cancer patients. The BRFSS results indicated that age and race/ethnicity are significantly associated with having a prostate cancer diagnosis. Marital status, home ownership, employment status, income level, education level obesity, exercise, alcohol consumption, smoking status were also found to be significantly associated. PSA knowledge and co-morbidities also had an association with a prostate cancer diagnosis. The HCUP-NIS results showed prostate cancer patients with Medicare had significantly shorter length of stay compared to Medicaid (-0.63 days). Private insurance (-0.70 days), self-pay ( 0.35 days), and no charge or other insurance (-0.71 days) also had shorter stays. The HCUP-NIS results also showed patients who had Transurethral Resection of the Prostate (TURP) had a $4,573 higher treatment cost compared to non-TURP. Patients who underwent a prostatectomy had a lower cost of -$3,974 compared to those who did not have a prostatectomy.This study highlights the importance of implementing a comprehensive approach which includes early detection, education and addressing health disparities leading to more positive outcomes and reduction of the economic burden of prostate cancer.
A University of Southern Indiana implementation of simultaneous localization and mapping
Creators: name: Runnion, Colin
name: Stone, Matthew
name: Talbert, Aaron
Publisher: name: Unknown
Year: 2018

description: This project attempts to use a Light Detection and Ranging [LiDAR] system
alongside algorithms, which will construct a 2D map of its surroundings and locate itself
within this map. This LiDAR system along with a Raspberry Pi; which operates the LiDAR,
attempts to localize itself using landmarks from its surroundings without knowing the
initial position or having a map of the area. This is done by incorporating a Simultaneous
Localization and Mapping [SLAM) algorithm. The SLAM algorithm uses the LiDAR to obtain
data about its surroundings; extracts landmarks from this data, and passes it through an
Extended Kalman Filter (EKF). The use of the EKF in this project will localize the robot
relative to the landmarks it obtains. As the system moves around its environment, the EKF
will supply an estimated position of the system, where this can be tested against its actual
position. For testing of this system in the future, the IEEE robot from 2017 was replicated
and delivers a testbed for the USI Engineering Department and IEEE club.
Chiral dynamics, S-wave contributions and angular analysis in $D\to ππ\ell\barν$
Creators: name: Shi, Yu-Ji
name: Wang, Wei
name: Zhao, Shuai
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We present a theoretical analysis of the $D^-\to π^+π^- \ell\barν$ and $\bar D^0\to π^+π^0 \ell\barν$ decays. We construct a general angular distribution which can include arbitrary partial waves of $ππ$. Retaining the S-wave and P-wave contributions we study the branching ratios, forward--backward asymmetries and a few other observables. The P-wave contribution is dominated by $ρ^0$ resonance, and the S-wave contribution is analyzed using the unitarized chiral perturbation theory. The obtained branching fraction for $D\to ρ\ellν$, at the order $10^{-3}$, is consistent with the available experimental data. The S-wave contribution has a branching ratio at the order of $10^{-4}$, and this prediction can be tested by experiments like BESIII and LHCb. Future measurements can also be used to examine the $π$--$π$ scattering phase shift.
description: 19 pages, 9 figures, 2 tables. To match the published version
Fourth-order analysis of a diffusive lattice Boltzmann method for barrier coatings
Creators: name: Strand, Kyle T.
name: Feickert, Aaron J.
name: Wagner, Alexander J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computational Physics (physics.comp-ph)
subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: We examine the applicability of diffusive lattice Boltzmann methods to simulate the fluid transport through barrier coatings, finding excellent agreement between simulations and analytical predictions for standard parameter choices. To examine more interesting non-Fickian behavior and multiple layers of different coatings, it becomes necessary to explore a wider range of parameters. However, such a range of parameters exposes deficiencies in such an implementation. To investigate these discrepancies, we examine the form of higher-order terms in the hydrodynamic limit of our lattice Boltzmann method. We identify these corrections to fourth order and validate these predictions with high accuracy. However, it is observed that the validated correction terms do not fully explain the bulk of observed error. This error was instead caused by the standard finite boundary conditions for the contact of the coating with the imposed environment. We identify a self-consistent form of these boundary conditions for which these errors are dramatically reduced. The instantaneous switching used as a boundary condition for the barrier problem proves demanding enough that any higher-order corrections meaningfully contribute for a small range of parameters. There is a large parameter space where the agreement between simulations and analytical predictions even in the second-order form are below 0.1%, making further improvements to the algorithm unnecessary for such an application.
description: 28 pages, 17 figures, updated to address referee comments, submitted to Phys. Rev. E
Hunting down massless dark photons in kaon physics
Creators: name: Fabbrichesi, M.
name: Gabrielli, E.
name: Mele, B.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: If dark photons are massless, they couple to standard-model particles only via higher dimensional operators, while the kinetic mixing with photons, which motivates most of the current experimental searches, is absent. We consider the effect of possible flavor-changing magnetic-dipole couplings of massless dark photons in kaon physics. In particular, we study the branching ratio for the process $K^+\rightarrow π^+π^0 \bar γ$ with a simplified-model approach, assuming the chiral quark model to evaluate the hadronic matrix element. Possible effects in the $K^0$-$\bar K^0$ mixing are taken into account. We find that branching ratios up to $O(10^{-7})$ are allowed---depending on the dark-sector masses and couplings. Such large branching ratios for $K^+\rightarrow π^+π^0 \bar γ$ could be of interest for experiments dedicated to rare $K^+$ decays like NA62 at CERN, where $\bar γ$ can be detected as a massless invisible system.
description: same as the published PRL version, 5 pages, 3 figures, a few comments and new references added
Scattering Dominated Spatial Coherence and Phase Correlation Properties in Plasmonic Lattice Lasers
Creators: name: Heikkinen, Janne I.
name: Asamoah, Benjamin
name: Calpe, Roman
name: Necada, Marek
name: Koivurova, Matias
name: Hakala, Tommi K.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We present a comprehensive study of the polarization and spatial coherence properties of the lasing modes supported by a 4-fold symmetric plasmonic lattice. By modifying only, the scattering properties of the individual particles while keeping the lattice geometry constant, we are able to distinguish the scattering induced effects from the lattice geometry induced effects. Customized interferometric measurements reveal that the lasing emission undergoes a drastic change from 1D to 2D spatial coherence with increasing particle size, accompanied with dramatic changes in the far field polarization and beaming properties. By utilizing T-matrix scattering simulations, we reveal the physical mechanism governing this transition. In particular, we find that there exists increased radiative coupling in the diagonal directions at the plane of the lattice when the particle diameter is increased. Finally, we demonstrate that the x- and y-polarized (degenerate) lasing modes become phase locked with sufficiently large particles.
description: 12 pages, 5 figures, Preprint, Submitted to New Journal of Physics
Multiplier Event no. 7: Atvirosios prieigos išteklių rinkinys apie piliečių mokslą
Creators: name: Sabaitytė, Giedrė
name: Bucevičiūtė, Laima
Publisher: name: Zenodo
Year: 2024

description: Event: Piliečių mokslas bibliotekininkams: atvirosios prieigos ištekliai mokymo(si) perspektyvoje (Citizen Science for Librarians: open access resources from ateaching/learning perspective), LIBOCS Multiplier Event number 7 Date: 24.05.2024Language: LithuanianTarget group: Lithuanian academic and public library staff

Objectives of the event:1. present the open access collection of resources on citizen science (PR6A1)2. to present Citizen Science toolkit for Librarians (PR6A2) and its potential or use inteaching and learning3. to demonstrate all the project results on Zenodo platform

Project acronym: LibOCSFull project title: University libraries strengthening the academia-society connection through citizen science in the Baltics

This project is funded under the Erasmus+ KA2 Strategic Partnerships program. Project Number: 2021-1-EE01-KA220-HED-000031125
Cosmologies inside hyperbolic black holes
Creators: name: Ross, Simon F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: Models with closed FRW cosmologies on the worldvolume of a constant-tension brane inside a black hole provide an interesting setup for studying cosmology holographically. However, in more than two worldvolume dimensions, there are limitations on such models with flat spatial slices. I show that these limitations can be avoided by considering instead hyperbolic slices. This also naturally makes contact with previous work on Euclidean wormholes.
description: 10 pages, 1 figure. arXiv admin note: text overlap with arXiv:2203.02523
Topological Anderson insulator phase in a Dirac-semimetal thin film
Creators: name: Chen, Rui
name: Xu, Dong-Hui
name: Zhou, Bin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: The recently discovered topological Dirac semimetal represents a new exotic quantum state of matter. Topological Dirac semimetals can be viewed as three dimensional analogues of graphene, in which the Dirac nodes are protected by crystalline symmetry. It has been found that quantum confinement effect can gap out Dirac nodes and convert Dirac semimetal to a band insulator. The band insulator is either normal insulator or quantum spin Hall insulator depending on the thin film thickness. We present the study of disorder effects in thin film of Dirac semimetals. It is found that moderate Anderson disorder strength can drive a topological phase transition from normal band insulator to topological Anderson insulator in Dirac semimetal thin film. The numerical calculation based on the model parameters of Dirac semimetal Na$_{3}$Bi shows that in the topological Anderson insulator phase a quantized conductance plateau occurs in the bulk gap of band insulator, and the distributions of local currents further confirm that the quantized conductance plateau arises from the helical edge states induced by disorder. Finally, an effective medium theory based on Born approximation fits the numerical data.
Continuous Functional Calculus for Quaternionic Bounded Normal Operators
Creators: name: Ramesh, G.
name: Kumar, P. Santhosh
Publisher: name: arXiv
Year: 2017
Subjects: subject: Spectral Theory (math.SP)
subject: Functional Analysis (math.FA)
subject: FOS: Mathematics
subject: 47S10, 47B15, 35P05

description: In this article we give an approach to define continuous functional calculus for bounded quaternionic normal operators defined on a right quaternionic Hilbert space.
description: Submitted to a journal. There was a gap in the previous version. We have corrected it and stated all the results for bounded case
The GAPS Programme at TNG. XLI. The climate of KELT-9b revealed with a new approach to high spectral resolution phase curves
Creators: name: Pino, L.
name: Brogi, M.
name: Désert, J. M.
name: Nascimbeni, V.
name: Bonomo, A. S.
name: Rauscher, E.
name: Basilicata, M.
name: Biazzo, K.
name: Bignamini, A.
name: Borsa, F.
name: Claudi, R.
name: Covino, E.
name: Di Mauro, M. P.
name: Guilluy, G.
name: Maggio, A.
name: Malavolta, L.
name: Micela, G.
name: Molinari, E.
name: Molinaro, M.
name: Montalto, M.
name: Nardiello, D.
name: Pedani, M.
name: Piotto, G.
name: Poretti, E.
name: Rainer, M.
name: Scandariato, G.
name: Sicilia, D.
name: Sozzetti, A.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: [Abridged] We present a novel method to study the thermal emission of exoplanets as a function of orbital phase at very high spectral resolution, and apply it to investigate the climate of the ultra-hot Jupiter KELT-9b. We combine 3 nights of HARPS-N and 2 nights of CARMENES optical spectra, covering orbital phases between quadratures (0.25 < phi < 0.75), when the planet shows its day-side hemisphere with different geometries. We co-add the signal of thousands of FeI lines through cross-correlation, which we map to a likelihood function. We investigate the phase-dependence of: (i) the line depths of FeI, and (ii) their Doppler shifts, by introducing a new method that exploits the very high spectral resolution of our observations. We confirm a previous detection of FeI emission and demonstrate a combined precision of 0.5 km s-1 on the orbital properties of KELT-9b. By studying the phase-resolved Doppler shift of FeI lines, we detect an anomaly in the planet's orbital radial velocity well-fitted with a slightly eccentric orbit (e = 0.016$\pm$0.003, w = 150$^{+13\circ}_{-11},~5σ$ preference). However, we argue that such anomaly can be explained by a day-night wind of a few km s-1 blowing neutral iron gas. Additionally, we find that the FeI emission line depths are symmetric around the substellar point within 10 deg ($2σ$). We show that these results are qualitatively compatible with predictions from general circulation models for ultra-hot Jupiter planets. Very high-resolution spectroscopy phase curves have the sensitivity to reveal a phase dependence in both the line depths and their Doppler shifts throughout the orbit. They are highly complementary to space-based phase curves obtained with HST and JWST, and open a new window into the still poorly understood climate and atmospheric structure of the hottest planets known.
description: Recommended for publication on A&A after referee report, awaiting acceptance. 25 pages, 19 figures, 3 tables
Dark-Bright Soliton Dynamics Beyond the Mean-Field Approximation
Creators: name: Katsimiga, G. C.
name: Koutentakis, G. M.
name: Mistakidis, S. I.
name: Kevrekidis, P. G.
name: Schmelcher, P.
Publisher: name: arXiv
Year: 2016
Subjects: subject: Quantum Physics (quant-ph)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Pattern Formation and Solitons (nlin.PS)
subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: The dynamics of dark-bright solitons beyond the mean-field approximation is investigated. We first examine the case of a single dark-bright soliton and its oscillations within a parabolic trap. Subsequently, we move to the setting of collisions, comparing the mean-field approximation to that involving multiple orbitals in both the dark and the bright component. Fragmentation is present and significantly affects the dynamics, especially in the case of slower solitons and in that of lower atom numbers. It is shown that the presence of fragmentation allows for bipartite entanglement between the distinguishable species. Most importantly the interplay between fragmentation and entanglement leads to the splitting of each of the parent mean-field dark-bright solitons, placed off-center within the parabolic trap, into a fast and a slow daughter solitary wave. The latter process is in direct contrast to the predictions of the mean-field approximation. A variety of excitations including dark-bright solitons in multiple (concurrently populated) orbitals is observed. Dark-antidark states and domain-wall-bright soliton complexes can also be observed to arise spontaneously in the beyond mean-field dynamics.
description: 17 pages, 11 figures
Survival Probability of Random Walks and Lévy Flights on a Semi-Infinite Line
Creators: name: Majumdar, Satya N.
name: Mounaix, Philippe
name: Schehr, Gregory
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We consider a one-dimensional random walk (RW) with a continuous and symmetric jump distribution, $f(η)$, characterized by a Lévy index $μ\in (0,2]$, which includes standard random walks ($μ=2$) and Lévy flights ($0
description: 20 pages, 3 figures, revised and accepted version
Lithium, masses, and kinematics of young Galactic dwarf and giant stars with extreme [$α$/Fe] ratios
Creators: name: Borisov, S.
name: Prantzos, N.
name: Charbonnel, C.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Recent spectroscopic explorations of large Galactic stellar samples stars have revealed the existence of red giants with [$α$/Fe] ratios that are anomalously high, given their relatively young ages. We revisit the GALAH DR3 survey to look for both dwarfs and giants with extreme [$α$/Fe] ratios, that is, the upper 1% in the [$α$/Fe]-[Fe/H] plane over the range in [Fe/H] between -1.1 and +0.4 dex. We refer to these outliers as "ex$α$fe" stars. We used the GALAH DR3 data and their value-added catalog to trace the properties (abundances, masses, ages, and kinematics) of the ex$α$fe stars. We investigated the effects of secular evolution and the magnitude limitations of GALAH to understand the mass and metallicity distributions of the sample stars. We also discuss the corresponding biases in previous studies of stars with high [$α$/Fe] in other surveys. We find both dwarf and giant ex$α$fe stars younger than 3 Gyr, which we refer to as "y-ex$α$fe" stars. Dwarf y-ex$α$fe stars exhibit lithium abundances similar to those of young [$α$/Fe]-normal dwarfs at the same age and [Fe/H]. In particular, the youngest and most massive stars of both populations exhibit the highest Li abundances, A(Li)~3.5 dex (i.e., a factor of 2 above the protosolar value), while cooler/older stars exhibit the same Li depletion patterns increasing with both decreasing mass and increasing age. In addition, the [Fe/H] and mass distributions of both the dwarf and giant y-ex$α$fe stars do not differ from those of their [$α$/Fe]-normal counterparts found in the thin disk and they share the same kinematic properties. We conclude that y-ex$α$fe dwarfs and giants are indeed young, their mass distribution shows no peculiarity, and they differ from young [$α$/Fe]-normal stars by their extreme [$α$/Fe] content only. However, their origin remains unclear.
description: 14 pages, 12 figures, accepted for publication in A&A
On the Bethe states of the one-dimensional supersymmetric t-J model with generic open boundaries
Creators: name: Sun, Pei
name: Wen, Fakai
name: Hao, Kun
name: Cao, Junpeng
name: Li, Guang-Liang
name: Yang, Wen-Li
name: Shi, Kangjie
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mathematical Physics (math-ph)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: By combining the algebraic Bethe ansatz and the off-diagonal Bethe ansatz, we investigate the supersymmetric t-J model with generic open boundaries. The eigenvalues of the transfer matrix are given in terms of an inhomogeneous T-Q relation, and the corresponding eigenstates are expressed in terms of nested Bethe states which have well-defined homogeneous limit. This exact solution provides basis for further analyzing the thermodynamic properties and correlation functions of the model.
description: 17 pages, 2 tables, published version
HD 60431, the CP2 star with the shortest rotational period -- Physical parameters and period analysis
Creators: name: Mikulasek, Z.
name: Semenko, E.
name: Paunzen, E.
name: Huemmerich, S.
name: North, P. L.
name: Bernhard, K.
name: Krticka, J.
name: Janik, J.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: CP2 stars show periodic photometric, spectroscopic, and magnetic variations with the rotational period. They are generally slow rotators, with rotational periods exceeding half a day, except for the late B-type star HD 60431, which has an unusually short rotational period of 0.4755 days. As slow rotation is deemed a necessary criterion for the establishment of chemical peculiarities, this characteristic renders HD 60431 a special object that might offer valuable insight into, and constraints on, the formation and evolution of CP2 stars. Our study aims at analysing the light variability, deriving atmospheric abundances, and determining detailed physical parameters of HD 60431 to confirm its status as the CP2 star with the shortest known rotational period, with special emphasis on the rotational period evolution. Photometric indices and high-resolution spectroscopy were employed to derive physical parameters, evolutionary status, and atmospheric abundances of our target star. A light variability study was carried out using combined sets of photometric data from ground- and space-based facilities. A circularly polarised spectrum was employed to check the presence of a longitudinal magnetic field in the star. With an age of only 10 Myr, HD 60431 is situated close to the zero-age main sequence and a member of the open cluster NGC 2547 in the Vela OB2 complex. We confirm its status as a classical late B-type CP2 star showing strong overabundances of Mg (1.8 dex), Si (1.9 dex), Ca (1.6 dex), Ti (2.2 dex), and Fe (1.8 dex). No conclusive evidence for the presence of a strong magnetic field was found in the available spectroscopic data. The available photometric time series data confirm the short rotational period and indicate a slight secular increase of the rotational period of P' = 7.5(6) ms/yr. HD 60431 is indeed the CP2 star with the shortest known rotational period.
description: 13 pages, accepted for Astronomy & Astrophysics
Mixing and diffusion in protoplanetary disc chemistry
Creators: name: Woitke, P.
name: Arabhavi, A. M.
name: Kamp, I.
name: Thi, W. -F.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We develop a simple iterative scheme to include vertical turbulent mixing and diffusion in ProDiMo thermo-chemical models for protoplanetary discs. The models are carefully checked for convergence toward the time-independent solution of the reaction-diffusion equations, as e.g. used in exoplanet atmosphere models. A series of five T Tauri disc models is presented where we vary the mixing parameter α mix from 0 to 0.01 and take into account (a) the radiative transfer feedback of the opacities of icy grains that are mixed upward and (b) the feedback of the changing molecular abundances on the gas temperature structure caused by exothermic reactions and increased line heating/cooling. We see considerable changes of the molecular and ice concentrations in the disc. The most abundant species (H2, CH4, CO, the neutral atoms in higher layers, and the ices in the midplane) are transported both up and down, and at the locations where these abundant chemicals finally decompose, for example by photo processes, the release of reaction products has important consequences for all other molecules. This generally creates a more active chemistry, with a richer mixture of ionised, atomic, molecular and ice species and new chemical pathways that are not relevant in the unmixed case. We discuss the impact on three spectral observations caused by mixing and find that (i) icy grains can reach the observable disc surface where they cause ice absorption and emission features at IR to far-IR wavelengths, (ii) mixing increases the concentrations of certain neutral molecules observable by mid-IR spectroscopy, in particular OH, HCN and C2H2, and (iii) mixing can change the optical appearance of CO in ALMA line images and channel maps, where strong mixing would cause the CO molecules to populate the distant midplane.
description: 19 pages, 13 Figures, accepted by A&A
Probing the quadrupole transition strength of 15C via deuteron inelastic scattering
Creators: name: Chen, J.
name: Kay, B. P.
name: Tang, T. L.
name: Tolstukhin, I. A.
name: Hoffman, C. R.
name: Li, H.
name: Yin, P.
name: Zhao, X.
name: Maris, P.
name: Vary, J. P.
name: Li, G.
name: Lou, J. L.
name: Avila, M. L.
name: Ayyad, Y.
name: Bennett, S.
name: Bazin, D.
name: Clark, J. A.
name: Freeman, S. J.
name: Jayatissa, H.
name: Müller-Gatermann, C.
name: Munoz, A.
name: Santiago-Gonzalez, D.
name: Sharp, D. K.
name: Wuosmaa, A. H.
name: Yuan, C. X.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences

description: Deuteron elastic scattering from 15C and inelastic scattering reactions to the first excited state of 15C were studied using a radioactive beam of 15C in inverse kinematics. The scattered deuterons were measured using HELIOS. The elastic scattering differential cross sections were analyzed using the optical model. A matter deformation length δd = 1.04(11) fm has been extracted from the differential cross sections of inelastic scattering to the first excited state. The ratio of neutron and proton matrix elements Mn/Mp = 3.6(4) has been determined from this quadrupole transition. Neutron effective charges and core-polarization parameters of 15C were determined and discussed. Results from ab-initio no-core configuration interaction calculations were also compared with the experimental observations. This result supports a moderate core decoupling effect of the valence neutron in 15C similarly to its isotone 17O, in line with the interpretation of other neutron-rich carbon isotopes.
Solving Moment Hierarchies for Chemical Reaction Networks
Creators: name: Krishnamurthy, Supriya
name: Smith, Eric
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Chemical Physics (physics.chem-ph)
subject: Molecular Networks (q-bio.MN)
subject: FOS: Physical sciences
subject: FOS: Biological sciences

description: The study of Chemical Reaction Networks (CRN's) is a very active field. Earlier well-known results \cite{Feinberg:def_01:87, Anderson:product_dist:10} identify a topological quantity called deficiency, for any CRN, which, when exactly equal to zero, leads to a unique factorized steady-state for these networks. No results exist however for the steady states of non-zero-deficiency networks. In this paper, we show how to write the full moment-hierarchy for any non-zero-deficiency CRN obeying mass-action kinetics, in terms of equations for the factorial moments (FM). Using these, we can recursively predict values for lower moments from higher moments, reversing the procedure usually used to solve moment hierarchies. We show, for non-trivial examples, that in this manner we can predict to high accuracy, any moment of interest, for CRN's with non-zero deficiency and non-factorizable steady states.
description: version appearing in journal
Vacua by Derivative Corrections in $\mathcal{N}=1$ Supergravity with Matter Multiplets
Creators: name: Inoue, Atsuki
name: Sasaki, Shin
Publisher: name: arXiv
Year: 2022
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the vacuum structures of four-dimensional $\mathcal{N} = 1$ old minimal supergravity with higher derivative corrections. We find that $\mathcal{N} = 1$ supergravity with Riemann curvature square corrections and higher derivative matter chiral multiplets induces a non-trivial de Sitter vacuum, even in the absence of superpotentials. This vacuum generically breaks supersymmetry. We show that the auxiliary fields in the gravity and the chiral multiples play important roles to generate a potential in supersymmetric higher derivative theories.
description: 6 pages, 4 figures, references added, minor modifications, published version
One loop effects of natural SUSY in indirect searches for SUSY particles at the ILC
Creators: name: Jimbo, M.
name: Kon, T.
name: Kouda, Y.
name: Ichikawa, M.
name: Kurihara, Y.
name: Ishikawa, T.
name: Kato, K.
name: Kuroda, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We have found the possible region of parameters of the minimal supersymmetric standard model (MSSM) within the bounds from the experimental results of the Higgs mass, the rare decay mode of $b$-quark, the muon $g-2$, the dark matter abundance, and the direct searches for the lighter stop (i.e., one of the supersymmetric partners of top quark) at the LHC. We present numerical results of calculations for the one loop effects of supersymmetric particles in the processes of $τ^+ τ^-$, $b \overline{b}$, $t \overline{t}$, and $Z h$ production at the ILC by using benchmark points within the possible region of the MSSM parameters.
description: 11 pages, 16 figures; Talk presented at the International Workshop on Future Linear Colliders (LCWS2016), Morioka, Japan, 5-9 December 2016. C16-12-05.4
Emission line star catalogues post-Gaia DR3: A validation of Gaia DR3 data using LAMOST OBA emission catalogue
Creators: name: Shridharan, B.
name: Mathew, Blesson
name: Bhattacharyya, Suman
name: Robin, T.
name: Arun, R.
name: Kartha, Sreeja S
name: Manoj, P.
name: Nidhi, S.
name: Maheshwar, G.
name: Paul, K. T.
name: Narang, Mayank
name: Himanshu, T.
Publisher: name: arXiv
Year: 2022
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Gaia DR3 and further releases have the potential to identify and categorise new emission-line stars in the Galaxy. We perform a comprehensive validation of astrophysical parameters from Gaia DR3 with the spectroscopically estimated emission-line star parameters from LAMOST OBA emission catalogue. We compare different astrophysical parameters provided by Gaia DR3 with those estimated using LAMOST spectra. By using a larger sample of emission-line stars, we perform a global polynomial and piece-wise linear fit to update the empirical relation to convert Gaia DR3 pseudo-equivalent width to observed equivalent width, after removing the weak emitters from the analysis. We find that the emission-line source classifications given by DR3 is in reasonable agreement with the classification from LAMOST OBA emission catalogue. The astrophysical parameters estimated by esphs module from Gaia DR3 provides a better estimate when compared to gspphot and gspspec. A second-degree polynomial relation is provided along with piece-wise linear fit parameters for the equivalent width conversion. We notice that the LAMOST stars with weak Hα emission are not identified to be in emission from BP/RP spectra. This suggests that emission-line sources identified by Gaia DR3 is incomplete. In addition, Gaia DR3 provides valuable information about the binary and variable nature of a sample of emission-line stars.
description: 6 pages, 5 figures and 1 table. Accepted for publication in A&A
Understanding $X(3862)$, $X(3872)$, and $X(3930)$ in a Friedrichs-model-like scheme
Creators: name: Zhou, Zhi-Yong
name: Xiao, Zhiguang
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We developed a Friedrichs-model-like scheme in studying the hadron resonance phenomenology and present that the hadron resonances might be regarded as the Gamow states produced by a Hamiltonian in which the bare discrete state is described by the result of usual quark potential model and the interaction part is described by the quark pair creation model. In a one-parameter calculation, the $X(3862)$, $X(3872)$, and $X(3930)$ state could be simultaneously produced with a quite good accuracy by coupling the three P-wave states, $χ_{c2}(2P)$, $χ_{c1}(2P)$, $χ_{c0}(2P)$ predicted in the Godfrey-Isgur model to the $D\bar D$, $D\bar D^{*}$, $D^*\bar D^*$ continuum states. At the same time, we predict that the $h_c(2P)$ state is at about 3902 MeV with a pole width of about 54 MeV. In this calculation, the $X(3872)$ state has a large compositeness. This scheme may shed more light on the long-standing problem about the general discrepancy between the prediction of the quark model and the observed values, and it may also provide reference for future search for the hadron resonance state.
description: 5 pages, 1 figure; A mistake was found in the numerical calculation and the numerical results change a little. The qualitative discussion and conclusion not changed