pinecone/core-2020-05-10-deduplication huggingface dataset:
T-Quarks at the Large Hadron Collider: 2010-12

We study the potential of the current Large Hadron Collider (LHC) 7 TeV run
to search for heavy, colored vector-like fermions, which are assumed to carry a
conserved Z2 quantum number forcing them to be pair-produced. Each fermion is
assumed to decay directly into a Standard Model quark and an invisible stable
particle. T-odd quarks (T-quarks) and the lightest T-odd particle (LTP) of the
Littlest Higgs model with T-parity provide an example of this setup. We
estimate the bounds based on the published CMS search for events with jets and
missing transverse energy in the 35 pb-1 data set collected in the 2010 run. We
find that T-quark masses below about 450 GeV are ruled out for the LTP mass
about 100 GeV. This bound is somewhat stronger than the published Tevatron
constraint. We also estimate the reach with higher integrated luminosities
expected in the 2011-12 run. If no deviation from the SM is observed, we expect
that a bound on the T-quark mass of about 650 GeV, for the LTP mass of 300 GeV
and below, can be achieved with 1 fb-1 of data. We comment on the possibility
of using initial-state radiation jets to constrain the region with
nearly-degenerate T-quark and LTP.Comment: 12 pages, 2 figure
Does Data Splitting Improve Prediction?

Data splitting divides data into two parts. One part is reserved for model
selection. In some applications, the second part is used for model validation
but we use this part for estimating the parameters of the chosen model. We
focus on the problem of constructing reliable predictive distributions for
future observed values. We judge the predictive performance using log scoring.
We compare the full data strategy with the data splitting strategy for
prediction. We show how the full data score can be decomposed into model
selection, parameter estimation and data reuse costs. Data splitting is
preferred when data reuse costs are high. We investigate the relative
performance of the strategies in four simulation scenarios. We introduce a
hybrid estimator called SAFE that uses one part for model selection but both
parts for estimation. We discuss the choice to use a split data analysis versus
a full data analysis
D-term Contributions to the Mixed Modulus-Anomaly Mediated Supersymmetry
  Breaking

We investigate effects of D-term contributions to the mixed modulus-anomaly
mediated supersymmetry breaking scenario. In the original scenario, the
tachyonic slepton problem in the pure anomaly mediated supersymmetry breaking
is cured by modulus contributions. We generalize the scenario so as to include
contributions from the D-terms of U(1)_Y and the gauged U(1)_{B-L} which is
motivated in a grand unified theory based on a higher rank gauge group such as
SO(10). As a consequence of additional $D$-term contributions to scalar masses,
we obtain various soft supersymmetry breaking mass spectra, which are different
from those obtained in the conventional mixed modulus-anomaly mediated
supersymmetry breaking. Especially, we find that the lightest superpartner
(LSP) neutralinos can be various types, such as Higgsino-like, wino-like and
bino-like degenerating with the next LSP sfermions.Comment: 15 pages, 8 figures. Some comments and four new figures have been
  adde
One loop calculations on the Wess-Zumino-Witten anomalous functional at
  finite temperature

We analyze the finite temperature (T) extension of the Wess-Zumino- Witten
functional, discussed in a previous work, to one loop in chiral perturbation
theory. As a phenomenological application, we calculate finite temperature
corrections to the amplitude of the $\pi^0$ decay into two photons. This
calculation is performed in three limits : i)$T/M_{\pi}<<1$, ii)the chiral
limit at finite T and iii)$T/M_{\pi}>>1$ ($M_{\pi}$ being the pion mass). The
$T$-corrections tend to vanish in the chiral limit, where only the kaon
contribution remains (although it is exponentially suppressed).Comment: Latex, 13 pages and 3 figures avalaible upon reques
Diffractive dissociation of gluons into heavy quark-antiquark pairs in
  proton-proton collisions

We discuss diffractive dissociation of gluons into heavy quark pairs. The
particular mechanism is similar to the diffractive dissociation of virtual
photons into quarks, which drives diffractive deep inelastic production of
charm in the low-mass diffraction, or large $\beta$-region. There, it can be
understood, with some reservations, in terms of a valence heavy quark content
of the Pomeron. The amplitude for the $g p \to Q \bar Q p$ is derived in the
impact parameter and momentum space. The cross section for single diffractive
$p p \to Q \bar Q p X$ is calculated as a convolution of the elementary cross
section and gluon distribution in the proton. Integrated cross section and the
differential distributions in e.g. transverse momentum and rapidity of the
charm and bottom quark and antiquark, as well as the quark-antiquark invariant
mass are calculated for the nominal LHC energy for different unintegrated gluon
distributions from the literature. The ratio of the bottom-to-charm cross
sections are shown and discussed as a function of several kinematical
variables.Comment: 17 pages, 12 figure
No further gravitational wave modes in $F(T)$ gravity

We explore the possibility of further gravitational wave modes in $F(T)$
gravity, where $T$ is the torsion scalar in teleparallelism. It is explicitly
demonstrated that gravitational wave modes in $F(T)$ gravity are equivalent to
those in General Relativity. This result is achieved by calculating the
Minkowskian limit for a class of analytic function of $F(T)$. This consequence
is also confirmed by the preservative analysis around the flat background in
the weak field limit with the scalar-tensor representation of $F(T)$ gravity.Comment: 7 pages, no figure, version accepted for publication in Physics
  Letters
Bulk Viscosity of dual Fluid at Finite Cutoff Surface via Gravity/Fluid
  correspondence in Einstein-Maxwell Gravity

Based on the previous paper arXiv:1207.5309, we investigate the possibility
to find out the bulk viscosity of dual fluid at the finite cutoff surface via
gravity/fluid correspondence in Einstein-Maxwell gravity. We find that if we
adopt new conditions to fix the undetermined parameters contained in the stress
tensor and charged current of the dual fluid, two new terms appear in the
stress tensor of the dual fluid. One new term is related to the bulk viscosity
term, while the other can be related to the perturbation of energy density. In
addition, since the parameters contained in the charged current are the same,
the charged current is not changed.Comment: 15 pages, no figure, typos corrected, new references and comments
  added, version accepted by PL
Asymptotic Behaviour of Pion--Pion Total Cross-Sections

We derive a sum rule which shows that the Froissart-Martin bound for the
asymptotic behaviour of the $\pi\pi$ total cross sections at high energies, if
modulated by the Lukaszuk-Martin coefficient of the leading $\log^2 s$
behaviour, cannot be an optimal bound in QCD. We next compute the total cross
sections for $\pi^+ \pi^-$, $\pi^{\pm} \pi^0$ and $\pi^0 \pi^0$ scattering
within the framework of the constituent chiral quark model (C$\chi$QM) in the
limit of a large number of colours $\Nc$ and discuss their asymptotic
behaviours. The same $\pi\pi$ cross sections are also discussed within the
general framework of Large-\Nc~QCD and we show that it is possible to make an
Ansatz for the isospin $I=1$ and $I=0$ spectrum which satisfy the
Froissart-Martin bound with coefficients which, contrary to the Lukaszuk-Martin
coefficient, are not singular in the chiral limit and have the correct
Large-\Nc~counting. We finally propose a simple phenomenological model which
matches the low energy behaviours of the $\sigma_{\pi^{\pm}\pi^0}^{\rm
total}(s)$ cross section predicted by the C$\chi$QM with the high energy
behaviour predicted by the Large-$\Nc$ Ansatz. The magnitude of these cross
sections at very high energies is of the order of those observed for the $pp$
and $p{\bar p}$ scattering total cross sections.Comment: 21 pages, 5 figures. Typos corrected. Changes in some wording and
  references added. Version to appear in JHE
New N=5,6, 3D gauged supergravities and holography

We study $N=5$ gauged supergravity in three dimensions with compact,
non-compact and non-semisimple gauge groups. The theory under consideration is
of Chern-Simons type with $USp(4,k)/USp(4)\times USp(k)$ scalar manifold. We
classify possible semisimple gauge groups of the $k=2,4$ cases and identify
some of their critical points. A number of supersymmetric $AdS_3$ critical
points are found, and holographic RG flows interpolating between these critical
points are also investigated. As one of our main results, we consider a
non-semisimple gauge group $SO(5)\ltimes \mathbf{T}^{10}$ for the theory with
$USp(4,4)/USp(4)\times USp(4)$ scalar manifold. The resulting theory describes
$N=5$ gauged supergravity in four dimensions reduced on $S^1/\mathbb{Z}_2$ and
admits a maximally supersymmetric $AdS_3$ critical point with
$Osp(5|2,\mathbb{R})\times Sp(2,\mathbb{R})$ superconformal symmetry. We end
the paper with the construction of $SO(6)\ltimes \mathbf{T}^{15}$ gauged
supergravity with $N=6$ supersymmetry. The theory admits a half-supersymmetric
domain wall as a vacuum solution and may be obtained from an $S^1/\mathbb{Z}_2$
reduction of $N=6$ gauged supergravity in four dimensions.Comment: 35 pages, 1 figur
The Dark Z' Portal: Direct, Indirect and Collider Searches

We perform a detailed study of the dark Z' portal using a generic
parametrization of the Z'-quarks couplings, both for light (8-15)GeV and heavy
(130-1000)GeV dark matter scenarios. We present a comprehensive study of the
collider phenomenology including jet clustering, hadronization, and detector
artifacts, which allows us to derive accurate bounds from the search for new
resonances in dijet events and from mono-jet events in the LHC 7TeV, LHC 8TeV,
and Tevatron 1.96 TeV data. We also compute the dark matter relic abundance,
the relevant scattering cross sections and pair-annihilation spectrum, and
compare our results with the current PLANCK, Fermi-LAT and XENON100/LUX bounds.
Lastly, we highlight the importance of complementary searches for dark matter,
and outline the excluded versus still viable parameter space regions of the
dark Z' portal.Comment: 29 pages, 21 figure
Discovery of large-scale diffuse radio emission and of a new galaxy
  cluster in the surroundings of MACSJ0520.7-1328

We report the discovery of large-scale diffuse radio emission South-East of
the galaxy cluster MACS J0520.7-1328, detected through high sensitivity Giant
Metrewave Radio Telescope 323 MHz observations. This emission is dominated by
an elongated diffuse radio source and surrounded by other features of lower
surface brightness. Patches of these faint sources are marginally detected in a
1.4 GHz image obtained through a re-analysis of archival NVSS data.
Interestingly, the elongated radio source coincides with a previously
unclassified extended X-ray source. We perform a multi-wavelength analysis
based on archival infrared, optical and X-ray Chandra data. We find that this
source is a low-temperature (~3.6 keV) cluster of galaxies, with indications of
a disturbed dynamical state, located at a redshift that is consistent with the
one of the main galaxy cluster MACS J0520.7-132 (z=0.336). We suggest that the
diffuse radio emission is associated with the non-thermal components in the
intracluster and intergalactic medium in and around the newly detected cluster.
We are planning deeper multi-wavelength and multi-frequency radio observations
to accurately investigate the dynamical scenario of the two clusters and to
address more precisely the nature of the complex radio emission.Comment: 10 pages, 6 Figures, accepted for publication in A&
The radio-loud AGN population at z>~1 in the COSMOS field. I. Selection
  and Spectral Energy Distributions

We select a sample of radio galaxies at high redshifts (z>~1) in the COSMOS
field, by cross-matching optical/infrared images with the FIRST radio data. The
aim of this study is to explore the high-z radio-loud (RL) AGN population at
much lower luminosities than the classical samples of distant radio sources and
similar to those of the local population of radio galaxies. The wide
multiwavelength coverage provided by the COSMOS survey allows us to derive
their Spectral Energy Distributions (SEDs). The SED modeling with stellar and
dust components (with our code 2SPD) returns several important quantities
associated with the AGN and host properties. The final sample consists of 74 RL
AGN, which extends the sample previously selected by Chiaberge et al. (2009)
and studied by Baldi et al. (2013). The resulting photometric redshifts range
from z~0.7 to 3. The sample mostly includes compact radio sources, but also 21
FRIIs; the radio power distribution of the sample at 1.4 GHz covers
~10^(31.5)-10^(34.3) \erg\s\Hz. The stellar mass of the hosts ranges
~10^(10)-10^(11.5) M_{sun}. The SEDs are dominated by the contribution from an
old stellar population for most of the sources. UV and mid-IR (MIR) excesses
are observed for half of the sample. The dust luminosities are in the range
L_(dust) ~10^(43)-10^(45.5) erg/s (T ~350-1200 K). UV luminosities at 2000 A
ranges ~10^(41.5)-10^(45.5) erg/s. UV emission is significantly correlated with
both IR and radio luminosities, the former being the stronger link. However,
the origin of UV and dust emission, whether it is produced by the AGN of by
star formation, is still unclear. Our results show that this RL AGN population
at high redshifts displays a wide variety of properties from possible quasars
at the highest luminosities, to low-luminosity old galaxies, similarly to the
local FRI-FRII dichotomy.Comment: accepted for publication on A&A, 35 pages, 13 figures, 8 table
Search for pair-production of long-lived heavy charged particles in $e^+ e^-$ annihilation

A search for pair-production of long-lived, heavy, singly-charged particles has been performed with data collected by the ALEPH detector at a centre-of-mass energy of 172 GeV. Data at \sqrt{s} = 161, 136, and 130 GeV are also included to improve the sensitivity to lower masses. No candidate is found in the data. A model-independent 95 % confidence level upper limit on the production cross section at 172 GeV of 0.2-0.4 pb is derived for masses between 45 and 86 GeV/c^2. This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c^2 on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c^2 on the mass of long-lived charginos.A search for pair-production of long-lived, heavy, singly-charged particles has been performed with data collected by the ALEPH detector at a centre-of-mass energy of 172 GeV. Data at \sqrt{s} = 161, 136, and 130 GeV are also included to improve the sensitivity to lower masses. No candidate is found in the data. A model-independent 95% confidence level upper limit on the production cross section at 172 GeV of 0.2-0.4pb is derived for masses between 45 and 86 GeV/c^2. This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c^2 on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c^2 on the mass of long-lived charginos.A search for pair-production of long-lived, heavy, singly-charged particles has been performed with data collected by the ALEPH detector at a centre-of-mass energy of 172 GeV. Data at s =161, 136 and 130 GeV are also included to improve the sensitivity to lower masses. No candidate is found in the data. A model-independent 95% confidence level upper limit on the production cross section at 172 GeV of 0.2–0.4 pb is derived for masses between 45 and 86 GeV/ c 2 . This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/ c 2 on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/ c 2 on the mass of long-lived charginos
Non--commutative Integration Calculus

We discuss a non--commutative integration calculus arising in the
mathematical description of anomalies in fermion--Yang--Mills systems. We
consider the differential complex of forms
$u_0\ccr{\eps}{u_1}\cdots\ccr{\eps}{u_n}$ with $\eps$ a grading operator on a
Hilbert space $\cH$ and $u_i$ bounded operators on $\cH$ which naturally
contains the compactly supported de Rham forms on $\R^d$ (i.e.\ $\eps$ is the
sign of the free Dirac operator on $\R^d$ and $\cH$ a $L^2$--space on $\R^d$).
We present an elementary proof that the integral of $d$--forms
$\int_{\R^d}\trac{X_0\dd X_1\cdots \dd X_d}$ for $X_i\in\Map(\R^d;\gl_N)$, is
equal, up to a constant, to the conditional Hilbert space trace of $\Gamma
X_0\ccr{\eps}{X_1}\cdots\ccr{\eps}{X_d}$ where $\Gamma=1$ for $d$ odd and
$\Gamma=\gamma_{d+1}$ (`$\gamma_5$--matrix') a spin matrix anticommuting with
$\eps$ for $d$ even. This result provides a natural generalization of
integration of de Rham forms to the setting of Connes' non--commutative
geometry which involves the ordinary Hilbert space trace rather than the
Dixmier trace.Comment: 16 pages, late
Determination of the Gamow-Teller Quenching Factor from Charge Exchange
  Reactions on 90Zr

Double differential cross sections between 0-12 degrees were measured for the
90Zr(n,p) reaction at 293 MeV over a wide excitation energy range of 0-70 MeV.
A multipole decomposition technique was applied to the present data as well as
the previously obtained 90Zr(p,n) data to extract the Gamow-Teller (GT)
component from the continuum. The GT quenching factor Q was derived by using
the obtained total GT strengths. The result is Q=0.88+/-0.06 not including an
overall normalization uncertainty in the GT unit cross section of 16%.Comment: 11 papes, 4 figures, submitted to Physics Letters B (accepted),
  gzipped tar file, changed content
Neurofibromatosis 2011: A Report of the Children’s Tumor Foundation Annual Meeting

The 2011 annual meeting of the Children’s Tumor Foundation, the annual gathering of the neurofibromatosis (NF) research and clinical communities, was attended by 330 participants who discussed integration of new signaling pathways into NF research, the appreciation for NF mutations in sporadic cancers, and an expanding pre-clinical and clinical agenda. NF1, NF2, and schwannomatosis collectively affect approximately 100,000 persons in US, and result from mutations in different genes. Benign tumors of NF1 (neurofibroma and optic pathway glioma) and NF2 (schwannoma, ependymoma, and meningioma) and schwannomatosis (schwannoma) can cause significant morbidity, and there are no proven drug treatments for any form of NF. Each disorder is associated with additional manifestations causing morbidity. The research presentations described in this review covered basic science, preclinical testing, and results from clinical trials, and demonstrate the remarkable strides being taken toward understanding of and progress toward treatments for these disorders based on the close interaction among scientists and clinicians
The roles of the nucleus accumbens core, dorsomedial striatum, and dorsolateral striatum in learning : performance and extinction of Pavlovian fear conditioned responses and instrumental avoidance responses

This study examined the effects of bilateral excitotoxic lesions of the nucleus accumbens core (NAc-co), dorsomedial striatum (DMS) or dorsolateral striatum (DLS) of rats on the learning and extinction of Pavlovian and instrumental components of conditioned avoidance responses (CARs). None of the lesions caused sensorimotor deficits that could affect locomotion. Lesions of the NAc-co, but not DMS or DLS, decreased unconditioned and conditioned freezing. The NAc-co and DLS lesioned rats learned the 2-way active avoidance task more slowly. These results suggest: (i) CARs depend on both Pavlovian and instrumental learning; (ii) learning the Pavlovian component of CARs depends on the NAc-co; learning the instrumental component of CARs depends on the DLS, NAc and DMS; (iii) although the NAc-co is also needed for learning the instrumental component, it is not clear whether it plays a role in learning the instrumental component per se or if it simply allows learning of the Pavlovian component which is a pre-condition for learning the instrumental component; (iv) we did not find evidence that the DMS and DLS play the same roles in habit and goal-directed aspects of the instrumental component of CARs as observed in appetitive motivated instrumental responding
A semilinear elliptic equation with a mild singularity at $u=0$:
  existence and homogenization

In this paper we consider semilinear elliptic equations with singularities,
whose prototype is the following \begin{equation*} \begin{cases} \displaystyle
- div \,A(x) D u = f(x)g(u)+l(x)& \mbox{in} \; \Omega,\\ u = 0 & \mbox{on} \;
\partial \Omega,\\ \end{cases} \end{equation*} where $\Omega$ is an open
bounded set of $\mathbb{R}^N,\, N\geq 1$, $A\in L^\infty(\Omega)^{N\times N}$
is a coercive matrix, $g:[0,+\infty)\rightarrow [0,+\infty]$ is continuous, and
$0\leq g(s)\leq {{1}\over{s^\gamma}}+1$ $\forall s>0$, with $0<\gamma\leq 1$
and $f,l \in L^r(\Omega)$, $r={{2N}\over{N+2}}$ if $N\geq 3$, $r>1$ if $N=2$,
$r=1$ if $N=1$, $f(x), l(x)\geq 0$ a.e. $x \in \Omega$.
  We prove the existence of at least one nonnegative solution and a stability
result; moreover uniqueness is also proved if $g(s)$ is nonincreasing or
"almost nonincreasing".
  Finally, we study the homogenization of these equations posed in a sequence
of domains $\Omega^\epsilon$ obtained by removing many small holes from a fixed
domain $\Omega$
Forward-central two-particle correlations in p-Pb collisions at
  $\sqrt{s_{\rm NN}}$ = 5.02 TeV

Two-particle angular correlations between trigger particles in the forward
pseudorapidity range ($2.5 < |\eta| < 4.0$) and associated particles in the
central range ($|\eta| < 1.0$) are measured with the ALICE detector in p-Pb
collisions at a nucleon-nucleon centre-of-mass energy of 5.02 TeV. The trigger
particles are reconstructed using the muon spectrometer, and the associated
particles by the central barrel tracking detectors. In high-multiplicity
events, the double-ridge structure, previously discovered in two-particle
angular correlations at midrapidity, is found to persist to the pseudorapidity
ranges studied in this Letter. The second-order Fourier coefficients for muons
in high-multiplicity events are extracted after jet-like correlations from
low-multiplicity events have been subtracted. The coefficients are found to
have a similar transverse momentum ($p_{\rm T}$) dependence in p-going (p-Pb)
and Pb-going (Pb-p) configurations, with the Pb-going coefficients larger by
about $16\pm6$%, rather independent of $p_{\rm T}$ within the uncertainties of
the measurement. The data are compared with calculations using the AMPT model,
which predicts a different $p_{\rm T}$ and $\eta$ dependence than observed in
the data. The results are sensitive to the parent particle $v_2$ and
composition of reconstructed muon tracks, where the contribution from heavy
flavour decays are expected to dominate at $p_{\rm T}>2$ GeV/$c$.Comment: 26 pages, 5 captioned figures, 2 tables, authors from page 20,
  published version, figures at
  http://aliceinfo.cern.ch/ArtSubmission/node/168