pinecone/core-2020-05-10-deduplication huggingface dataset:
Naturality vs perturbativity, $B_s$ physics, and LHC data in triplet
  extension of MSSM

In this study we investigate the phenomenological viability of the $Y=0$
Triplet Extended Supersymmetric Standard Model (TESSM) by comparing its
predictions with the current Higgs data from ATLAS, CMS, and Tevatron, as well
as the measured value of the $B_s\to X_s \gamma$ branching ratio. We scan
numerically the parameter space for data points generating the measured
particle mass spectrum and also satisfying current direct search constraints on
new particles. We require all the couplings to be perturbative up to the scale
$\Lambda_{\rm UV}=10^4$ TeV, by running them with newly calculated two loop
beta functions, and find that TESSM retains perturbativity as long as
$\lambda$, the triplet coupling to the two Higgs doublets, is smaller than 1.34
in absolute value. For $|\lambda|\gtrsim 0.8$ we show that the fine-tuning
associated to each viable data point can be greatly reduced as compared to
values attainable in MSSM. We also find that for perturbatively viable data
points it is possible to obtain either enhancement or suppression in
$h\rightarrow \gamma \gamma$ decay rate depending mostly on the relative sign
between $M_2$ and $\mu_D$. Finally, we perform a fit by taking into account 58
Higgs physics observables along with $\mathcal{B}r(B_s\to X_s \gamma)$, for
which we calculate the NLO prediction within TESSM. We find that, although
naturality prefers a large $|\lambda|$, the experimental data disfavors it
compared to the small $|\lambda|$ region, because of the low energy observable
$\mathcal{B}r(B_s\to X_s \gamma)$. We notice, though, that this situation might
change with the second run of LHC at 14 TeV, in case the ATLAS or CMS results
confirm, with smaller uncertainty, a large enhancement in the Higgs decay
channel to diphoton, given that this scenario strongly favours a large value of
$|\lambda|$.Comment: 26 pages, 10 figures; typos corrected, fit results updated with CMS
  new (July 2014) Higgs decay to diphoton data, conclusions slightly change
Chiral algebras of class S

Four-dimensional N=2 superconformal field theories have families of protected
correlation functions that possess the structure of two-dimensional chiral
algebras. In this paper, we explore the chiral algebras that arise in this
manner in the context of theories of class S. The class S duality web implies
nontrivial associativity properties for the corresponding chiral algebras, the
structure of which is best summarized in the language of generalized
topological quantum field theory. We make a number of conjectures regarding the
chiral algebras associated to various strongly coupled fixed points.Comment: 47+15 pages, 9 figures, 6 tables. v2: Conjecture 1 modified to
  accommodate new data. Some typos correcte
Superintegrability in a two-dimensional space of non-constant curvature

A Hamiltonian with two degrees of freedom is said to be superintegrable if it
admits three functionally independent integrals of the motion. This property
has been extensively studied in the case of two-dimensional spaces of constant
(possibly zero) curvature when all the independent integrals are either
quadratic or linear in the canonical momenta. In this article the first steps
are taken to solve the problem of superintegrability of this type on an
arbitrary curved manifold in two dimensions. This is done by examining in
detail one of the spaces of revolution found by G. Koenigs. We determine that
there are essentially three distinct potentials which when added to the free
Hamiltonian of this space have this type of superintegrability. Separation of
variables for the associated Hamilton-Jacobi and Schroedinger equations is
discussed. The classical and quantum quadratic algebras associated with each of
these potentials are determined.Comment: 27 page
The WITCH Experiment: towards weak interactions studies. Status and
  prospects

Primary goal of the WITCH experiment is to test the Standard Model for a
possible ad-mixture of a scalar or tensor type interaction in beta-decay. This
information will be inferred from the shape of the recoil energy spectrum. The
experimental set-up was completed and is under intensive commissioning at
ISOLDE (CERN). It combines a Penning trap to store the ions and a retardation
spectrometer to probe the recoil ion energy. A brief overview of the WITCH
set-up and the results of commissioning tests performed until now are
presented. Finally, perspectives of the physics program are reviewed.Comment: TCP06 Conference Proceedings, accepted for publication in Hyperfine
  Interaction
Applying the imprecise Dirichlet model in cases with partial observations and dependencies in failure data.

Imprecise probabilistic methods in reliability provide exciting opportunities for dealing with partial observations and incomplete knowledge on dependencies in failure data. In this paper, we explore the use of the imprecise Dirichlet model for dealing with such information, and we derive both exact results and bounds which enable analytical investigations. However, we only consider a very basic two-component system, as analytical solutions for larger systems will become very complex. We explain how the results are related to similar analyses under data selection or reporting bias, and we discuss some challenges for future research
Wavelength-Dependent UV Photodesorption of Pure \(N_2\) and \(O_2\) Ices

Context: Ultraviolet photodesorption of molecules from icy interstellar grains can explain observations of cold gas in regions where thermal desorption is negligible. This non-thermal desorption mechanism should be especially important where UV fluxes are high. Aims: \(N_2\) and \(O_2\) are expected to play key roles in astrochemical reaction networks, both in the solid state and in the gas phase. Measurements of the wavelength-dependent photodesorption rates of these two infrared-inactive molecules provide astronomical and physical-chemical insights into the conditions required for their photodesorption.
Methods: Tunable radiation from the DESIRS beamline at the SOLEIL synchrotron in the astrophysically relevant 7 to 13.6 eV range is used to irradiate pure \(N_2\) and \(O_2\) thin ice films. Photodesorption of molecules is monitored through quadrupole mass spectrometry. Absolute rates are calculated by using the well-calibrated CO photodesorption rates. Strategic \(N_2\) and \(O_2\) isotopolog mixtures are used to investigate the importance of dissociation upon irradiation. Results: \(N_2\) photodesorption mainly occurs through excitation of the \(b^1\sqcap_u\) state and subsequent desorption of surface molecules. The observed vibronic structure in the \(N_2\) photodesorption spectrum, together with the absence of \(N_3\) formation, supports that the photodesorption mechanism of \(N_2\) is similar to CO, i.e., an indirect DIET (Desorption Induced by Electronic Transition) process without dissociation of the desorbing molecule. In contrast, \(O_2\) photodesorption in the 7−13.6 eV range occurs through dissociation and presents no vibrational structure. Conclusions: Photodesorption rates of \(N_2\) and \(O_2\) integrated over the far-UV field from various star-forming environments are lower than for CO. Rates vary between \(10^{-3}\) and \(10^{-2}\) photodesorbed molecules per incoming photon.Astronom
Measurement of the W W + W Z cross section and limits on anomalous triple gauge couplings using final states with one lepton, missing transverse momentum, and two jets with the ATLAS detector at â\u88\u9as = 7 TeV

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the articleâ\u80\u99s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/ by/4.0/Â© 2015, The Author(s).Abstract: The production of a W boson decaying to eÎ½ or Î¼Î½ in association with a W or Z boson decaying to two jets is studied using 4.6 fbâ\u88\u921 of proton-proton collision data at â\u88\u9as =7 TeV recorded with the ATLAS detector at the LHC. The combined WW + WZ cross section is measured with a significance of 3.4Ï\u83 and is found to be 68Â±7 (stat.)Â±19 (syst.) pb, in agreement with the Standard Model expectation of 61.1Â±2.2 pb. The distribution of the transverse momentum of the dijet system is used to set limits on anomalous contributions to the triple gauge coupling vertices and on parameters of an effective-field-theory model.[Figure not available: see fulltext.
Up, down, strange and charm quark masses with Nf = 2+1+1 twisted mass lattice QCD

We present a lattice QCD calculation of the up, down, strange and charm quark masses performed using the gauge configurations produced by the European Twisted Mass Collaboration with Nf=2+1+1 dynamical quarks, which include in the sea, besides two light mass degenerate quarks, also the strange and charm quarks with masses close to their physical values. The simulations are based on a unitary setup for the two light quarks and on a mixed action approach for the strange and charm quarks. The analysis uses data at three values of the lattice spacing and pion masses in the range 210–450 MeV, allowing for accurate continuum limit and controlled chiral extrapolation. The quark mass renormalization is carried out non-perturbatively using the RI′-MOM method. The results for the quark masses converted to the  scheme are: mud(2 GeV)=3.70(17) MeV, ms(2 GeV)=99.6(4.3) MeV and mc(mc)=1.348(46) GeV. We obtain also the quark mass ratios ms/mud=26.66(32) and mc/ms=11.62(16). By studying the mass splitting between the neutral and charged kaons and using available lattice results for the electromagnetic contributions, we evaluate mu/md=0.470(56), leading to mu=2.36(24) MeV and md=5.03(26) MeV
Effects of the d-donor level of vanadium on the properties of Zn_(1-x)V_(x)O films

We report the effect of d-levels of vanadium atoms on the electronic band structure of ZnO. Polycrystalline layers of Zn_(1-x)V_(x)O with 0  ≤ x  ≤ 0.08  were synthesized using magnetron sputtering technique. Electrical measurements show that electron concentration increases with vanadium up to x = 0.04 and then decreases and films become insulating for x > 0.06. Optical characterization reveals that the absorption edge shifts to higher energy, while the photoluminescence (PL) peak shows a shift to lower energy with increasing vanadium content. This unusual optical behavior can be explained by an anticrossing interaction between the vanadium d-levels and the conduction band (CB) of ZnO. The interaction results in an upward shift of unoccupied CB (E+) and the downward shift of the fully occupied E- band derived from the vanadium d-levels. The composition dependence of optical absorption edge (E+) and PL peak (E-) can be fitted using the Band Anticrossing model with the vanadium d-level located at 0.13 eV below CB of ZnO and a coupling constant of 0.65 eV
Temperature-controlled metal/ligand stoichiometric ratio\ud
in Ag-TCNE coordination networks

The deposition of tetracyanoethylene (TCNE) on Ag(111), both at Room Temperature (RT, 300K) and low temperatures (150 K), leads to the formation of coordination networks involving silver adatoms, as revealed by Variable-Temperature Scanning Tunneling Microscopy (VT-STM). Our results indicate that TCNE molecules etch away material from the step edges and possibly also from the terraces, which facilitates the formation of the observed coordination networks. Moreover, such process is temperature dependent, which allows for different stoichiometric ratios between Ag and TCNE just by adjusting the deposition temperature. X-ray Photoelectron Spectroscopy (XPS) and Density Functional Theory (DFT)  calculations reveal that charge-transfer from the surface to the molecule and the concomitant geometrical distortions at both sides of the organic/inorganic interface might facilitate the extraction of silver atoms from the step-edges and, thus, its incorporation into the observed TCNE coordination networks
Rational Hausdorff Divisors: A New approach to the Approximate Parametrization of Curves.

When applying computational mathematics in practical applications, even though one may be dealing with a problem that can be solved algorithmically, and even though one has good algorithms to approach the solution, it can happen, and often it is the case, that the problem has to be reformulated and analyzed from a different computational point of view. This is the case of the development of approximate algorithms. This paper frames in the research area of approximate algebraic geometry and commutative algebra and, more precisely, on the problem of the approximate parametrization
Large A t without the desert

Even if the unification and supersymmetry breaking scales are around 10 6 to 10 9 TeV, a large A t coupling may be entirely generated at low energies through RGE evolution in the 5D MSSM. Independent of the precise details of supersymmetry breaking, we take advantage of power law running in five dimensions and a compactification scale in the 10 − 10 3 TeV range to show how the gluino mass may drive a large enough A t to achieve the required 125 . 5 GeV Higgs mass. This also allows for sub-TeV stops, possibly observable at the LHC, and preserving GUT unification, thereby resulting in improved naturalness properties with respect to the four dimensional MSSM. The results apply also to models of “split families” in which the first and second generation matter fields are in the bulk and the third is on the boundary, which may assist in the generation of light stops whilst satisfying collider constraints on the first two generations of squarks
The Appell function F1 and Regge string scattering amplitudes

We show that each 26D open bosonic Regge string scattering amplitude (RSSA) can be expressed in terms of one single Appell function F1 in the Regge limit. This result enables us to derive infinite number of recurrence relations among RSSA at arbitrary mass levels, which are conjectured to be related to the known SL(5,C) dynamical symmetry of F1 . In addition, we show that these recurrence relations in the Regge limit can be systematically solved so that all RSSA can be expressed in terms of one amplitude. All these results are dual to high energy symmetries of fixed angle string scattering amplitudes discovered previously [4–8]
Toward the classification of differential calculi on κ -Minkowski space and related field theories

Classification of differential forms on κ -Minkowski space, particularly, the classification of all bicovariant differential calculi of classical dimension is presented. By imposing super-Jacobi identities we derive all possible differential algebras compatible with the κ -Minkowski algebra for time-like, space-like and light-like deformations. Embedding into the super-Heisenberg algebra is constructed using non-commutative (NC) coordinates and one-forms. Particularly, a class of differential calculi with an undeformed exterior derivative and one-forms is considered. Corresponding NC differential calculi are elaborated. Related class of new Drinfeld twists is proposed. It contains twist leading to κ -Poincaré Hopf algebra for light-like deformation. Corresponding super-algebra and deformed super-Hopf algebras, as well as the symmetries of differential algebras are presented and elaborated. Using the NC differential calculus, we analyze NC field theory, modified dispersion relations, and discuss further physical applications
BMS supertranslations and Weinberg’s soft graviton theorem

Recently it was conjectured that a certain infinite-dimensional “diagonal” subgroup of BMS supertranslations acting on past and future null infinity ( and ) is an exact symmetry of the quantum gravity S -matrix, and an associated Ward identity was derived. In this paper we show that this supertranslation Ward identity is precisely equivalent to Weinberg’s soft graviton theorem. Along the way we construct the canonical generators of supertranslations at , including the relevant soft graviton contributions. Boundary conditions at the past and future of and a correspondingly modified Dirac bracket are required. The soft gravitons enter as boundary modes and are manifestly the Goldstone bosons of spontaneously broken supertranslation invariance
The NLO contributions to the scalar pion form factors and the O(αs2) annihilation corrections to the B→ππ decays

In this paper, by employing the kT factorization theorem, we made the first calculation for the space-like scalar pion form factor Q2F(Q2) at the leading order (LO) and the next-to-leading order (NLO) level, and then found the time-like scalar pion form factor Fa,I′(1) by analytic continuation from the space-like one. From the analytical evaluations and the numerical results, we found the following points: (a) the NLO correction to the space-like scalar pion form factor has an opposite sign with the LO one but is very small in magnitude, can produce at most 10% decrease to the LO result in the considered Q2 region; (b) the NLO time-like scalar pion form factor Fa,I′(1) describes the O(αs2) contribution to the factorizable annihilation diagrams of the considered B→ππ decays, i.e. the NLO annihilation correction; (c) the NLO part of the form factor Fa,I′(1) is very small in size, and is almost independent of the variation of cutoff scale μ0 , but this form factor has a large strong phase around −55° and may play an important role in producing large CP violation for B→ππ decays; and (d) for B0→π+π− and π0π0 decays, the newly known NLO annihilation correction can produce only a very small enhancement to their branching ratios, less than 3% in magnitude, and therefore we could not interpret the well-known ππ -puzzle by the inclusion of this NLO correction to the factorizable annihilation diagrams
On the positive correlation between education and fertility\ud
intentions in Europe: Individual- and country-level evidence

Increasing shares of European women are making large investments in their human capital. Whether and to what extent these investments are in conflict with reproductive behaviour are issues that have repercussions for fertility levels. Using two Eurobarometer survey data (2006 and 2011) on individuals clustered in the 27 EU countries, I investigate the relationship between women's education and lifetime fertility intentions. Results suggest that a positive association between women's level of education and lifetime fertility intentions exists at both the individual and country levels, as well as in a micro-macro integrated framework. The main explanation for these findings - which remains to be proven by future research - is that, in institutional contexts allowing highly educated women to have large families, women of reproductive ages are more prone to make investments in both human capital and\ud
family size, because these choices are not seen as incompatible alternatives. (author's abstract
Environmental processes in Rano Aroi (Easter Island) peat geochemistry forced by climate variability during the last 70 kyr

62 p., gráf, tablas -- Post-print del artículo publicado en Palaeogeography, Palaeoclimatology, Palaeoecology. Versión revisada y corregida.We analyze the geochemistry of Rano Aroi mire record (Easter Island) using bulk peat composition (C, N, S) and stable isotopes (δ13C, δ15N, δ34S) and major, minor and trace elemental compositions obtained by ICP-AES (Al, Ti, Zr, Sc, V, Y, Fe, Mn, Th, Ba, Ca, Mg and Sr). Peat geochemistry and the pollen record are used to reconstruct the environmental changes during the last 70 kyr BP. Principal component analysis on ICP-AES data revealed that three main components account for the chemical signatures of the peat. The first component, characterized by lithogenic elements (combined signal of V, Al, Sc, Y, Cr, Cd, Ti, Zr and Cu), evidences long-term changes in the basal fluxes of mineral material into the mire. This component, in combination with stable isotopes and pollen data suggests a link between soil erosion and vegetation cover changes in the Rano Aroi watershed. The second component is identified by the signal of Fe, Mn, Th, Ba, Zr and Ti, and is indicative of strong runoff events during enhanced precipitation periods. The third component (tied mainly to Ca, Sr and Mg) reflects a strong peat oxidation event that occurred during an arid period with more frequent droughts, sometime between 39 and 31 kyr BP. Correlation coefficients and a multiple regression model (PCR analysis) between peat organic chemistry and the principal components of ICP-AES analysis were calculated. Isotope chemistry of the peat organic matter further contributes to define Rano Aroi environmental history: δ13C data corroborates a vegetation shift documented by the palynological record from C4 to C3 between 55 and 45 cal kyr BP; the δ15N record identifies periods of changes in mire productivity and denitrification processes, while the δ34S peat signature indicates a marine origin of S and significant diagenetic cycling. The geochemical and environmental evolution of Rano Aroi mire is coherent with the regional climatic variability and suggests that climate was the main forcing in mire evolution during the last 70 kyr BP. The coupling of geochemical and biological proxies improves our ability to decipher depositional processes in tropical and subtropical peatlands and to use these sequences for paleoenvironmental and paleoclimate reconstructions.This research was funded by the Spanish Ministry of Science and Education through the projects LAVOLTER (CGL2004-00683/BTE), GEOBILA (CGL2007-60932/BTE) and CONSOLIDER GRACCIE (CSD2007-00067) and an undergraduate grant JAE (BOE 04/03/2008) to Olga Margalef.Peer reviewe
Algorithms for detecting protein complexes in PPI networks: an evaluation study

Since protein complexes play important biological roles in cells, many computational methods have been proposed to detect protein complexes from protein-protein interaction (PPI) data. In this paper, we first review four reputed protein-complex detection algorithms (MCODE[2], MCL[21], CPA[1] and DECAFF[14]) and then present a comprehensive evaluation among them on two popular yeast PPI data3. We also discuss their relative strengthes and disadvantages to guide interested researchers.PRIB 2008 proceedings found at: http://dx.doi.org/10.1007/978-3-540-88436-