pinecone/core-2020-05-10-deduplication huggingface dataset:
The Three Dimensional Thirring Model for N_f=4 and N_f=6

We present Monte Carlo simulation results for the three dimensional Thirring
model for numbers of fermion flavors N_f=4 and 6. For N_f=4 we find a second
order chiral symmetry breaking transition at strong coupling, corresponding to
an ultra-violet fixed point of the renormalisation group defining a non-trivial
continuum limit. The critical exponents extracted from a fit to a model
equation of state are distinct from those found for N_f=2. For N_f=6, in
contrast, we present evidence for tunnelling between chirally symmetric and
broken vacua at strong coupling, implying that the phase transition is first
order and no continuum limit exists. The implications for the phase diagram of
the model in the plane of coupling strength and N_f are briefly discussed.Comment: 29 pages, 13 figure
Affleck-Dine Leptogenesis and Low Scale Inflation

We study Affleck-Dine leptogenesis via the L H_u flat direction in
supersymmetric theories. We find that the baryon asymmetry is enhanced when the
energy scale of the inflation is sufficiently low. Especially, we consider
models of low scale inflation in which the Hubble parameter during inflation is
comparable to (but slightly larger than) the gravitino mass m_{3/2} \sim 1
\TeV. The observed cosmological baryon asymmetry is obtained with the lightest
neutrino mass m_{\nu_1} \sim 10^{-4} eV, if the reheating process is suddenly
terminated after inflation.Comment: 11pages, 2 eps figure
Full one-loop electroweak radiative corrections to single Higgs
  production in e+ e-

We present the full ${{\cal O}}(\alpha)$ electroweak radiative corrections to
single Higgs production in \epemt. This takes into account the full one-loop
corrections as well as the effects of hard photon radiation. We include both
the fusion and Higgs-strahlung processes. The computation is performed with the
help of {\tt GRACE-loop} where we have implemented a generalised non-linear
gauge fixing condition. The latter includes 5 gauge parameters that can be used
for checks on our results. Besides the UV, IR finiteness and gauge parameter
independence checks it proves also powerful to test our implementation of the
5-point function. We find that for a 500GeV machine and a light Higgs of mass
150GeV, the total ${{\cal O}}(\alpha)$ correction is small when the results are
expressed in terms of $\alpha_{{\rm QED}}$. The total correction decreases
slightly for higher energies. For moderate centre of mass energies the total
${{\cal O}}(\alpha)$ decreases as the Higgs mass increases, reaching -10% for
$M_H=350$GeV and $\sqrt{s}=500$GeV. In order to quantify the genuine weak
corrections we have subtracted the universal virtual and bremsstrahlung
correction from the full ${{\cal O}}(\alpha)$. We find, for $M_H=150$GeV, a
weak correction slowly decreasing from -2% to -4% as the energy increases from
$\sqrt{s}=300$GeV to $\sqrt{s}=1$TeV after expressing the tree-level results in
terms of $G_\mu$Comment: 16 pages, 3 figures. Only correction is a reference to a web-pag
Quark-Gluon Antenna Functions from Neutralino Decay

The computation of exclusive QCD jet observables at higher orders requires a
method for the subtraction of infrared singular configurations arising from
multiple radiation of real partons. One commonly used method at next-to-leading
order (NLO) is based on the antenna factorization of colour-ordered matrix
elements, and uses antenna functions to subtract the real radiation
singularities. Up to now, NLO antenna functions could be derived in a
systematic manner only for hard quark-antiquark pairs, while the gluon-gluon
and quark-gluon antenna functions were constructed from their limiting
behaviour. In this paper, we show that antenna functions for hard quark-gluon
pairs can be systematically derived from an effective Lagrangian describing
heavy neutralino decay. The infrared structure of the colour-ordered neutralino
decay matrix elements at NLO and NNLO is shown to agree with the structure
observed for parton radiation off a quark-gluon antenna.Comment: 13 pages, 3 figures, minor typos corrected, references adde
On the new COMPASS measurement of the deuteron spin-dependent structure
  function $g_1^d$

Very recently, a new measurement of the deuteron spin-dependent structure
function $g_1^d (x)$ was reported by the COMPASS group. A main change from the
old SMC measurement is a considerable improvement of the statistical accuracy
in the low $x$ region $0.004 < x < 0.03$. We point out that the new COMPASS
data for $g_1^d (x)$ as well as their QCD fits for $\Delta \Sigma$ and $\Delta
s + \Delta \bar{s}$ are all remarkably close to our theoretical predictions
given several years ago based on the chiral quark soliton model.Comment: Errors in Fig.4 were corrected. Version accepted for publication in
  Physics Letters
Bethe Ansaetze for GKP strings

Studying the scattering of excitations around a dynamical background has a
long history in the context of integrable models. The Gubser-Klebanov-Polyakov
string solution provides such a background for the string/gauge correspondence.
Taking the conjectured all-loop asymptotic equations for the AdS_4/CFT_3
correspondence as the starting point, we derive the S-matrix and a set of
spectral equations for the lowest-lying excitations. We find that these
equations resemble closely the analogous equations for AdS_5/CFT_4, which are
also discussed in this paper. At large values of the coupling constant we show
that they reproduce the Bethe equations proposed to describe the spectrum of
the low-energy limit of the AdS_4xCP^3 sigma model.Comment: 60 pages, 5 figure
Higgs couplings and new signals from Flavon-Higgs mixing effects within
  multi-scalar models

Testing the properties of the Higgs particle discovered at the LHC and
searching for new physics signals, are some of the most important tasks of
Particle Physics today. Current measurements of the Higgs couplings to fermions
and gauge bosons, seem consistent with the Standard Model, and when taken as a
function of the particle mass, should lay on a single line. However, in models
with an extended Higgs sector the diagonal Higgs couplings to up-quarks,
down-quarks and charged leptons, could lay on different lines, while
non-diagonal flavor-violating Higgs couplings could appear too. We describe
these possibilities within the context of multi-Higgs doublet models that
employ the Froggatt-Nielsen (FN) mechanism to generate the Yukawa hierarchies.
Furthermore, one of the doublets can be chosen to be of the inert type, which
provides a viable dark matter candidate. The mixing of the Higgs doublets with
the flavon field, can provide plenty of interesting signals, including: i)
small corrections to the couplings of the SM-like Higgs, ii) exotic signals
from the flavon fields, iii) new signatures from the heavy Higgs bosons. These
aspects are studied within a specific model with 3+1 Higgs doublets and a
singlet FN field. Constraints on the model are derived from the study of K and
D mixing and the Higgs search at the LHC. For last, the implications from the
latter aforementioned constraints to the FCNC top decay $t\to ch$ are presented
too.Comment: 10 pages, 3 figures and 2 tables; v2: author added, text improved;
  v3: Title and Abstract slightly changed, 19 pages, references, tables and
  images added, additional clarifications; matches version published by Nucl.
  Phys.
Instabilities and Anti-Evaporation of Reissner-Nordstr\"om Black Holes
  in modified $F(R)$ gravity

We study the instabilities and related anti-evaporation of the extremal
Reissner-Nordstr\"om (RN) black hole in $F(R)$ gravity. It is remarkable that
the effective electric charge can be generated for some solutions of $F(R)$
gravity without electromagnetic field. The anti-evaporation effect occurs but
it emerges only in the strong coupling limit of the effective gravitational
coupling. The instabilities of RN black hole are also investigated when the
electromagnetic sector is added to the action of $F(R)$ gravity. We show the
anti-evaporation occurs in the Maxwell-$F(R)$ gravity with the arbitrary
gravitational coupling constant although it does not occur in the
Maxwell-Einstein gravity. Furthermore, general spherically-symmetric solution
of $F(R)$ gravity in the Einstein frame is obtained.Comment: LaTeX 11 pages, no figure, publication data: Physics Letters B 735,
  376-382 (2014
On the boundaries of quantum integrability for the spin-1/2
  Richardson-Gaudin system

We discuss a generalised version of Sklyanin's Boundary Quantum Inverse
Scattering Method applied to the spin-1/2, trigonometric sl(2) case, for which
both the twisted-periodic and boundary constructions are obtained as limiting
cases. We then investigate the quasi-classical limit of this approach leading
to a set of mutually commuting conserved operators which we refer to as the
trigonometric, spin-1/2 Richardson-Gaudin system. We prove that the rational
limit of the set of conserved operators for the trigonometric system is
equivalent, through a change of variables, rescaling, and a basis
transformation, to the original set of trigonometric conserved operators.
Moreover we prove that the twisted-periodic and boundary constructions are
equivalent in the trigonometric case, but not in the rational limit.Comment: 29 page
Status of the Gribov-Pontecorvo Solution to the Solar Neutrino Problem

We discuss the status of the Gribov--Pontecorvo (GP) solution to the solar neutrino problem. This solution naturally appears in bimaximal neutrino mixing and reduces the solar and atmospheric neutrino problems to vacuum oscillations of three active neutrinos. The GP solution predicts an energy-independent suppression of the solar neutrino flux. It is disfavoured by the rate of the Homestake detector, but its statistical significance greatly improves, when the chlorine rate and the boron neutrino flux are slightly rescaled, and when the Super-Kamiokande neutrino spectrum is included in the analysis. Our results show that rescaling of the chlorine signal by only 10% is sufficient for the GP solution to exist, if the boron--neutrino flux is taken 10 -- 20% lower than the SSM prediction. The regions allowed for the GP solution in the parameter space are found and observational signatures of this solution are discussed
Correlation lengths and E_8 mass spectrum of the dilute A_3 lattice
  model

The exact perturbation approach is used to derive the elementary correlation
lengths $\xi_i$ and related mass gaps $m_i$ of the two-dimensional dilute A_L
lattice model in regimes 1 and 2 for L odd from the Bethe Ansatz solution. In
regime 2 the A_3 model is the E_8 lattice realisation of the two-dimensional
Ising model in a magnetic field at T=T_c. The calculations for the A_3 model in
regime 2 start from the eight thermodynamically significant string types found
in previous numerical studies. These string types are seen to be consistent in
the ordered high field limit. The eight masses obtained reduce with the
approach to criticality to the E_8 masses predicted by Zamolodchikov, thus
providing a further direct lattice determination of the E_8 mass spectrum.Comment: 57 pages, Latex, Elsevier style file
Linear response theory for magnetic Schroedinger operators in disordered
  media

We justify the linear response theory for an ergodic Schroedinger operator
with magnetic field within the non-interacting particle approximation, and
derive a Kubo formula for the electric conductivity tensor. To achieve that, we
construct suitable normed spaces of measurable covariant operators where the
Liouville equation can be solved uniquely. If the Fermi level falls into a
region of localization, we recover the well-known Kubo-Streda formula for the
quantum Hall conductivity at zero temperature.Comment: Latex, 68 pages, misprints corrected, formatting change
The $ R $--matrix action of untwisted affine quantum groups at roots of
  1

Let $\hat{\frak g}$ be an untwisted affine Kac-Moody algebra. The quantum
group $U_h(\hat{\frak g})$ (over $\mathbb{C}[[h]]$) is known to be a
quasitriangular Hopf algebra: in particular, it has a universal $ R $--matrix,
which yields an $ R $--matrix for each pair of representations of
$U_h(\hat{\frak g})$. On the other hand, the quantum group $U_q(\hat{\frak g})$
(over $\mathbb{C}(q) $) also has an $ R $--matrix for each pair of
representations, but it has not a universal $ R $--matrix so that one cannot
say that it is quasitriangular. Following Reshetikin, one introduces the
(weaker) notion of braided Hopf algebra: then $ U_q(\hat{\frak g})$ is a
braided Hopf algebra.
  In this work we prove that also the unrestricted specializations of
$U_q(\hat{\frak g})$ at roots of 1 are braided: in particular, specializing $q$
at 1 we have that the function algebra $F \big[ \hat{H} \big]$ of the Poisson
proalgebraic group $\hat{H}$ dual of $\hat{G}$ (a Kac-Moody group with Lie
algebra $\hat{\frak g} \,$) is braided. This is useful because, despite these
specialized quantum groups are not quasitriangular, the braiding is enough for
applications, mainly for producing knot invariants. As an example, the action
of the $ R $--matrix on (tensor products of) Verma modules can be specialized
at odd roots of 1.Comment: 12 pages, AMS-TeX C, Version 2.1c - this is the author's file of the
  final version (after the refereeing process), as sent for publicatio
Centrality Dependence of the High p_T Charged Hadron Suppression in
  Au+Au collisions at sqrt(s_NN) = 130 GeV

PHENIX has measured the centrality dependence of charged hadron p_T spectra
from central Au+Au collisions at sqrt(s_NN)=130 GeV. The truncated mean p_T
decreases with centrality for p_T > 2 GeV/c, indicating an apparent reduction
of the contribution from hard scattering to high p_T hadron production. For
central collisions the yield at high p_T is shown to be suppressed compared to
binary nucleon-nucleon collision scaling of p+p data. This suppression is
monotonically increasing with centrality, but most of the change occurs below
30% centrality, i.e. for collisions with less than about 140 participating
nucleons. The observed p_T and centrality dependence is consistent with the
particle production predicted by models including hard scattering and
subsequent energy loss of the scattered partons in the dense matter created in
the collisions.Comment: 7 pages text, LaTeX, 6 figures, 2 tables, 307 authors, resubmitted to
  Phys. Lett. B. Revised to address referee concerns. Plain text data tables
  for the points plotted in figures for this and previous PHENIX publications
  are publicly available at
  http://www.phenix.bnl.gov/phenix/WWW/run/phenix/papers.htm
Experimental and Computer Simulation Study of the Radionuclides Produced
  in Thin Bi-209 Targets by 130 MeV and 1.5 GeV Protons

The results of experimental and computer simulation studies of the yields of
residual product nuclei in Bi-209 thin targets irradiated by 130 MeV and 1.5
GeV protons are presented. The yields were measured by direct high-precision
gamma-spectrometry. The gamma-spectrometer resolution was 1.8 keV in the 1332
keV line. The gamma-spectra were processed by the ASPRO code. The gamma-lines
were identified, and the cross sections defined, by the SIGMA code using the
GDISP radioactive database. The process was monitored by the Al-27(p,x)Na-24
reaction. Results are presented for comparisons between the 209-Bi(p,x)
reaction yields obtained experimentally and simulated by the HETC, GNASH,
LAHET, INUCL, CEM95, CASCADE, and ALICE codes.Comment: 31 pages, LaTeX, 6 tables, 12 figures available upon request from
  mashnik@t2y.lanl.gov or batyaev@alfa10.itep.ru (not available in electronic
  form), to be published in NIM
'Diverse mobilities': second-generation Greek-Germans engage with the homeland as children and as adults

This paper is about the children of Greek labour migrants in Germany. We focus on two life-stages of ‘return’ for this second generation: as young children brought to Greece on holidays or sent back for longer periods, and as young adults exercising an independent ‘return’ migration. We draw both on literature and on our own field interviews with 50 first- and second-generation Greek-Germans. We find the practise of sending young children back to Greece to have been surprisingly widespread yet little documented. Adult relocation to the parental homeland takes place for five reasons: (i) a ‘search for self’; (ii) attraction of the Greek way of life; (iii) the actualisation of the ‘family narrative of return’ by the second, rather than the first, generation; (iv) life-stage events such as going to university or marrying a Greek; (v) escape from a traumatic event or oppressive family situation. Yet the return often brings difficulties, disillusionment, identity reappraisal, and a re-evaluation of the German context
Short-period X-ray oscillations in super-soft novae and persistent SSS

Transient short-period <100s oscillations have been found in the X-ray light
curves of three novae during their SSS phase and in one persistent SSS. We
pursue an observational approach to determine possible driving mechanisms and
relations to fundamental system parameters such as the white dwarf mass.
  We performed a systematic search for short-period oscillations in all
available XMM-Newton and Chandra X-ray light curves of persistent SSS and novae
during their SSS phase. To study time evolution, we divided each light curve
into short time segments and computed power spectra. We then constructed
dynamic power spectra from which we identified transient periodic signals even
when only present for a short time. From all time segments of each system, we
computed fractions of time when periodic signals were detected.
  In addition to the previously known systems with short-period oscillations,
RS Oph (35s), KT Eri (35s), V339 Del (54s), and Cal 83 (67s), we found one
additional system, LMC 2009a (33s), and also confirm the 35s period from
Chandra data of KT Eri. The amplitudes of oscillations are of order <15% of the
respective count rates and vary without any clear dependence on the X-ray count
rate. The fractions of the time when the respective periods were detected at
2-sigma significance (duty cycle) are 11.3%, 38.8%, 16.9%, 49.2%, and 18.7% for
LMC 2009a, RS Oph, KT Eri, V339 Del, and Cal 83, respectively. The respective
highest duty cycles found in a single observation are 38.1%, 74.5%, 61.4%,
67.8%, and 61.8%.Comment: accepted for publication in A&
Muon-induced background to proton decay in the $p \rightarrow K^{+}\nu$
  decay channel with large underground liquid argon TPC detectors

Large liquid argon TPC detector programs such as LBNE and LAGUNA-LBNO will be
able to make measurements of the proton lifetime which will outperform
Cherenkov detectors in the proton decay channel $p \rightarrow K^{+}\nu$. At
the large depths which are proposed for such experiments, a non-negligible
source of isolated charged kaons may be produced in the showers of cosmogenic
muons. We present an estimate of the cosmogenic muon background to proton decay
in the $p \rightarrow K^{+}\nu$ channel. The simulation of muon transport to a
depth of 4 km w.e, is performed in the MUSIC framework and the propagation of
muons and secondary particles through to a cylindrical 20 kt LAr target is
performed using Geant4. An exposure time of 100 years is considered, with a
rate of $< 0.0012$ events/kt/year at 90$\%$ CL predicted from our simulations.Comment: 4 pages, 2 figures, accepted for publication in Physics Letters
From species to communities : the signature of recreational use on a tropical river ecosystem

This work was funded by an ERC grant (BIOTIME 250189). A. E. M. thanks the Royal Society and M. D. thanks the Scottish Funding Council (MASTS HR09011) for support.Disturbance can impact natural communities in multiple ways. However, there has been a tendency to focus on single indicators of change when examining the effects of disturbance. This is problematic as classical diversity measures, such as Shannon and Simpson indices, do not always detect the effects of disturbance. Here, we instead take a multilevel, hierarchical approach, looking for signatures of disturbance in the capacity and diversity of the community, and also in allocation and demography at the population level. Using recreational use as an example of disturbance, and the freshwater streams of Trinidad as a model ecosystem, we repeatedly sampled the fish communities and physical parameters of eight pairs of recreational and nonrecreational sites every 3 months over a 28-month period. We also chose the Trinidadian guppy (Poecilia reticulata) as the subject of our population-level analyses. Regression tree analysis, together with analysis of deviance, revealed that community capacity and community species richness were greater at sites with higher levels of recreational use. Interestingly, measures of community diversity that took into account the proportional abundance of each species were not significantly associated with recreational use. Neither did we find any direct association between recreational use and proportion of guppy biomass in the community. However, population-level differences were detected in the guppy: Sex ratio was significantly more male-biased at more disturbed sites. Our findings emphasize the importance of considering multiple levels when asking how disturbance impacts a community. We advocate the use of a multilevel approach when monitoring the effects of disturbance, and highlight gaps in our knowledge when it comes to interpreting these effects.Publisher PDFPeer reviewe
Comparison of Raman-scattering and Shubnikov-de Haas measurements to determine charge density in doped semiconductors

We have verified the accuracy of free-charge determinations from Raman scattering in doped semiconductors by comparing the results obtained from phonon-plasmon coupled-mode line-shape fits with the charge-density values extracted from the analysis of the Shubnikov-de Haas oscillations. The experiments were carried out on n-InP layers, and conduction band nonparabolicity was included both in the Lindhard-Mermin model used to fit the Raman spectra and in the Shubnikov-de Haas analysis. We find a very good agreement between Raman and magnetotransport results, which confirms the reliability of the charge-density determination from Raman-scattering measurements when the line-shape analysis is carried out using the Lindhard-Mermin model
Search for the production of dark matter in association with top-quark pairs in the single-lepton final state in proton-proton collisions at $\sqrt{s}$ = 8 TeV

A search is presented for particle dark matter produced in association with a pair of top quarks in pp collisions at a centre-of-mass energy of $\sqrt{s}$ = 8 TeV. The data were collected with the CMS detector at the LHC and correspond to an integrated luminosity of 19.7 $fb^{−1}$. This search requires the presence of one lepton, multiple jets, and large missing transverse energy. No excess of events is found above the SM expectation, and upper limits are derived on the production cross section. Interpreting the findings in the context of a scalar contact interaction between fermionic dark matter particles and top quarks, lower limits on the interaction scale are set. These limits are also interpreted in terms of the dark matter-nucleon scattering cross sections for the spin-independent scalar operator and they complement direct searches for dark matter particles in the low mass region
Missing data perspectives of the fluvoxamine data set: a review

Fitting models to incomplete categorical data requires more care than fitting models to the complete data counterparts, not only in the setting of missing data that are non-randomly missing, but even in the familiar missing at random setting. Various aspects of this point of view have been considered in the literature. We review it using data from a multi-centre trial on the relief of psychiatric symptoms. First, it is shown how the usual expected information matrix (referred to as naive information) is biased even under a missing at random mechanism. Second, issues that arise under non-random missingness assumptions are illustrated. It is argued that at least some of these problems can be avoided using contextual information.status: publishe