pinecone/core-2020-05-10-deduplication huggingface dataset:
Microlensing Discovery of a Tight, Low Mass-ratio Planetary-mass Object
  around an Old, Field Brown Dwarf

Observations of accretion disks around young brown dwarfs have led to the
speculation that they may form planetary systems similar to normal stars. While
there have been several detections of planetary-mass objects around brown
dwarfs (2MASS 1207-3932 and 2MASS 0441-2301), these companions have relatively
large mass ratios and projected separations, suggesting that they formed in a
manner analogous to stellar binaries. We present the discovery of a
planetary-mass object orbiting a field brown dwarf via gravitational
microlensing, OGLE-2012-BLG-0358Lb. The system is a low secondary/primary mass
ratio (0.080 +- 0.001), relatively tightly-separated (~0.87 AU) binary composed
of a planetary-mass object with 1.9 +- 0.2 Jupiter masses orbiting a brown
dwarf with a mass 0.022 M_Sun. The relatively small mass ratio and separation
suggest that the companion may have formed in a protoplanetary disk around the
brown dwarf host, in a manner analogous to planets.Comment: 6 pages, 3 figures, 3 tables, Submitted in Ap
Search for Z_c^+(3900) in the 1^+- channel on the lattice

Recently three experiments reported a discovery of manifestly exotic
Z_c^+(3900) in the decay to J/psi pi+, while J and P are experimentally
unknown. We search for this state on the lattice by simulating the channel with
J^PC=1^+- and I=1, and we do not find a candidate for Z_c^+(3900). Instead, we
only find discrete scattering states D D* and J/psi pi, which inevitably have
to be present in a dynamical QCD. The possible reasons for not finding $Z_c^+$
may be that its quantum numbers are not $1^{+-}$ or that the employed
interpolating fields are not diverse enough. Simulations with additional types
of interpolators will be needed to reach a more definite conclusion.Comment: 10 pages, 3 figures, version to appear in Phys. Lett.
Bounding the Higgs width at the LHC using full analytic results for gg
  -> 2e 2\mu

We revisit the hadronic production of the four-lepton final state, e^- e^+
\mu^- \mu^+, through the fusion of initial state gluons. This process is
mediated by loops of quarks and we provide first full analytic results for
helicity amplitudes that account for both the effects of the quark mass in the
loop and off-shell vector bosons. The analytic results have been implemented in
the Monte Carlo program MCFM and are both fast, and numerically stable in the
region of low Z transverse momentum. We use our results to study the
interference between Higgs-mediated and continuum production of four-lepton
final states, which is necessary in order to obtain accurate theoretical
predictions outside the Higgs resonance region. We have confirmed and extended
a recent analysis of Caola and Melnikov that proposes to use a measurement of
the off-shell region to constrain the total width of the Higgs boson. Using a
simple cut-and-count method, existing LHC data should bound the width at the
level of 25-45 times the Standard Model expectation. We investigate the power
of using a matrix element method to construct a kinematic discriminant to
sharpen the constraint. In our analysis the bound on the Higgs width is
improved by a factor of about 1.6 using a simple cut on the MEM discriminant,
compared to an invariant mass cut m_{4l} > 300 GeV.Comment: 40 pages, 12 Figures, 7 Table
Dust Spectral Energy Distributions of Nearby Galaxies: an Insight from
  the Herschel Reference Survey

We gather infrared (IR) photometric data from 8 to 500 microns (Spitzer,
WISE, IRAS and Herschel) for all of the HRS galaxies. Draine & Li (2007) models
are fit to the data from which the stellar contribution has been carefully
removed. We find that our photometric coverage is sufficient to constrain all
of the models parameters and that a strong constraint on the 20-60 microns
range is mandatory to estimate the relative contribution of the
photo-dissociation regions to the IR SED. The SED models tend to systematically
under-estimate the observed 500 microns flux densities, especially for low mass
systems. We provide the output parameters for all of the galaxies: the minimum
intensity of the interstellar radiation field (ISRF), the fraction of PAH, the
relative contribution of PDR and evolved stellar population to the dust
heating, the $M_{dust}$ and the $L_{IR}$. For a subsample of gas-rich galaxies,
we analyze the relations between these parameters and the integrated properties
of galaxies, such as $M_*$, SFR, metallicity, H$\alpha$ and H-band surface
brightness, and the FUV attenuation. A good correlation between the fraction of
PAH and the metallicity is found implying a weakening of the PAH emission in
galaxies with low metallicities. The intensity of the IRSF and the H-band and
H$\alpha$ surface brightnesses are correlated, suggesting that the diffuse dust
component is heated by both the young stars in star forming regions and the
diffuse evolved population. We use these results to provide a new set of IR
templates calibrated with Herschel observations on nearby galaxies and a mean
SED template to provide the z=0 reference for cosmological studies. For the
same purpose, we put our sample on the SFR-$M_*$ diagram. The templates are
compared to the most popular IR SED libraries, enlightening a large discrepancy
between all of them in the 20-100 microns range.Comment: 37 pages, 17 figures, 11 tables, accepted for publication in A&
Natural convection with mixed insulating and conducting boundary
  conditions: low and high Rayleigh numbers regimes

We investigate the stability and dynamics of natural convection in two
dimensions, subject to inhomogeneous boundary conditions. In particular, we
consider a Rayleigh-B\`enard (RB) cell, where the horizontal top boundary
contains a periodic sequence of alternating thermal insulating and conducting
patches, and we study the effects of the heterogeneous pattern on the global
heat exchange, both at low and high Rayleigh numbers. At low Rayleigh numbers,
we determine numerically the transition from a regime characterized by the
presence of small convective cells localized at the inhomogeneous boundary to
the onset of bulk convective rolls spanning the entire domain. Such a
transition is also controlled analytically in the limit when the boundary
pattern length is small compared with the cell vertical size. At higher
Rayleigh number, we use numerical simulations based on a lattice Boltzmann
method to assess the impact of boundary inhomogeneities on the fully turbulent
regime up to $Ra \sim 10^{10}$
Hilbert Series and Moduli Spaces of k U(N) Vortices

We study the moduli spaces of k U(N) vortices which are realized by the Higgs
branch of a U(k) supersymmetric gauge theory. The theory has 4 supercharges and
lives on k D1-branes in a N D3- and NS5-brane background. We realize the vortex
moduli space as a C* projection of the vortex master space. The Hilbert series
is calculated in order to characterize the algebraic structure of the vortex
master space and to identify the precise C* projection. As a result, we are
able to fully classify the moduli spaces up to 3 vortices.Comment: 102 pages, 8 figures, 5 table
Towards R-matrix construction of Khovanov-Rozansky polynomials. I.
  Primary $T$-deformation of HOMFLY

We elaborate on the simple alternative from arXiv:1308.5759 to the
matrix-factorization construction of Khovanov-Rozansky (KR) polynomials for
arbitrary knots and links in the fundamental representation of arbitrary SL(N).
Construction consists of 2 steps: first, with every link diagram with m
vertices one associates an m-dimensional hypercube with certain q-graded vector
spaces, associated to its 2^m vertices. A generating function for q-dimensions
of these spaces is what we suggest to call the primary T-deformation of HOMFLY
polynomial -- because, as we demonstrate, it can be explicitly reduced to
calculations of ordinary HOMFLY polynomials, i.e. to manipulations with quantum
R-matrices. The second step is a certain minimization of residues of this new
polynomial with respect to T+1. Minimization is ambiguous and is actually
specified by the choice of commuting cut-and-join morphisms, acting along the
edges of the hypercube -- this promotes it to Abelian quiver, and KR polynomial
is a Poincare polynomial of associated complex, just in the original Khovanov's
construction at N=2. This second step is still somewhat sophisticated -- though
incomparably simpler than its conventional matrix-factorization counterpart. In
this paper we concentrate on the first step, and provide just a mnemonic
treatment of the second step. Still, this is enough to demonstrate that all the
currently known examples of KR polynomials in the fundamental representation
can be easily reproduced in this new approach. As additional bonus we get a
simple description of the DGR relation between KR polynomials and
superpolynomials and demonstrate that the difference between reduced and
unreduced cases, which looks essential at KR level, practically disappears
after transition to superpolynomials. However, a careful derivation of all
these results from cohomologies of cut-and-join morphisms remains for further
studies.Comment: 146 pages; some points clarified, some typos correcte
Quantum spin models for the SU(n)_1 Wess-Zumino-Witten model

We propose 1D and 2D lattice wave functions constructed from the SU(n)_1
Wess-Zumino-Witten (WZW) model and derive their parent Hamiltonians. When all
spins in the lattice transform under SU(n) fundamental representations, we
obtain a two-body Hamiltonian in 1D, including the SU(n) Haldane-Shastry model
as a special case. In 2D, we show that the wave function converges to a class
of Halperin's multilayer fractional quantum Hall states and belongs to chiral
spin liquids. Our result reveals a hidden SU(n) symmetry for this class of
Halperin states. When the spins sit on bipartite lattices with alternating
fundamental and conjugate representations, we provide numerical evidence that
the state in 1D exhibits quantum criticality deviating from the expected
behaviors of the SU(n)_1 WZW model, while in 2D they are chiral spin liquids
being consistent with the prediction of the SU(n)_1 WZW model.Comment: 28 pages, 9 figures, published versio
N=2 SO(4) 7D gauged supergravity with topological mass term from 11
  dimensions

We construct a consistent reduction ansatz of eleven-dimensional supergravity
to $N=2$ $SO(4)$ seven-dimensional gauged supergravity with topological mass
term for the three-form field. The ansatz is obtained from a truncation of the
$S^4$ reduction giving rise to the maximal $N=4$ $SO(5)$ gauged supergravity.
Therefore, the consistency is guaranteed by the consistency of the $S^4$
reduction. Unlike the gauged supergravity without topological mass having a
half-supersymmetric domain wall vacuum, the resulting 7D gauged supergravity
theory admits a maximally supersymmetric $AdS_7$ critical point. This
corresponds to $N=(1,0)$ superconformal field theory in six dimensions. We also
study RG flows from this $N=(1,0)$ SCFT to non-conformal $N=(1,0)$ Super
Yang-Mills theories in the seven-dimensional framework and use the reduction
ansatz to uplift this RG flow to eleven dimensions.Comment: 20 pages, no figures, typos corrected, fermionic supersymmetry
  transformations and more detail adde
Non-linear Q-clouds around Kerr black holes

Q-balls are regular extended `objects' that exist for some non-gravitating,
self-interacting, scalar field theories with a global, continuous, internal
symmetry, on Minkowski spacetime. Here, analogous objects are also shown to
exist around rotating (Kerr) black holes, as non-linear bound states of a test
scalar field. We dub such configurations Q-clouds. We focus on a complex
massive scalar field with quartic plus hexic self-interactions. Without the
self-interactions, linear clouds have been shown to exist, in synchronous
rotation with the black hole horizon, along 1-dimensional subspaces - existence
lines - of the Kerr 2-dimensional parameter space. They are zero modes of the
superradiant instability. Non-linear Q-clouds, on the other hand, are also in
synchronous rotation with the black hole horizon; but they exist on a
2-dimensional subspace, delimited by a minimal horizon angular velocity and by
an appropriate existence line, wherein the non-linear terms become irrelevant
and the Q-cloud reduces to a linear cloud. Thus, Q-clouds provide an example of
scalar bound states around Kerr black holes which, generically, are not zero
modes of the superradiant instability. We describe some physical properties of
Q-clouds, whose backreaction leads to a new family of hairy black holes,
continuously connected to the Kerr family.Comment: 11 pages, 4 figure
Stabilizing dilaton and moduli vacua in string and M-Theory cosmology

We show how non-trivial form fields can induce an effective potential for the dilaton and metric moduli in compactifications of type II string theory and M-theory. For particular configurations, the potential can have a stable minimum. In cosmological compactifications of type II theories, we demonstrate that, if the metric moduli become fixed, this mechanism can then lead to the stabilization of the dilaton vacuum. Furthermore, we show that for certain cosmological M-theory solutions, non-trivial forms lead to the stabilization of moduli. We present a number of examples, including cosmological solutions with two solitonic forms and examples corresponding to the infinite throat of certain p-branes
$B_{c}$ meson production at the Tevatron Revisited

CDF recently measured the quantity $\frac{\sigma(B_c^+)}{\sigma(B^+)} {}from which we determine the ratio $\frac{\sigma(B_c^+)}{\sigma(\bar b)}$ to be $(2.08\err{1.06}{0.95})\times 10^{-3}$. If we interpret this ratio as a fragmentation probability, we show that this ratio is consistent with the prediction by perturbative QCD $B_c$ fragmentation function of Braaten, Cheung, and Yuan. We also estimate the parameter $m_c$ (charm quark mass) of the fragmentation function, and predict the production rate at RunII
An example of Kaluza-Klein-like theory with boundary conditions, which
  lead to massless and mass protected spinors chirally coupled to gauge fields

The genuine Kaluza-Klein-like theories (with no fields in addition to
gravity) have difficulties with the existence of massless spinors after the
ompactification of some of dimensions of space\cite{witten}. We assume a
$M^{(1+3)} \times$ a flat finite disk in $(1+5)$-dimensional space, with the
boundary allowing spinors of only one handedness. Massless spinors then
chirally couple to the corresponding background gauge gravitational field,
which solves equations of motion for a free field, linear in the Riemann
curvature.Comment: 10 pages, references adde
Towards the supersymmetric standard model from intersecting D6-branes on
  the Z_6' orientifold

We construct N=1 supersymmetric fractional branes on the Z_6' orientifold.
Intersecting stacks of such branes are needed to build a supersymmetric
standard model. If a,b are the stacks that generate the SU(3)_c and SU(2)_L
gauge particles, then, in order to obtain just the chiral spectrum of the
(supersymmetric) standard model (with non-zero Yukawa couplings to the
  Higgs multiplets), it is necessary that the number ofintersections a \circ b
of the stacks a and b, and the number of intersections a \circ b' of a with the
orientifold image b' of b satisfy (a \circ b,a \circ b')=\pm(2,1) or \pm(1,2).
It is also necessary that there is no matter in symmetric representations of
the gauge group, and not too much matter in antisymmetric representations, on
either stack. We provide a number of examples having these properties.
Different lattices give different solutions and different physics.Comment: 27 pages. Typos removed. Error regarding theta^2 and theta^3 twisted
  sector cycles corrected. v4 Further corrections and reference added. New
  material added on possibility of (a \circ b, a \circ b')=(3,0) and
  contributions of antisymmetric representations to U(1) charges. To appear in
  Nucl. Phys.
Charged particle multiplicities in heavy and light quark initiated events above the $Z^0$ peak

We have measured the mean charged particle multiplicities separately for bbbar, ccbar and light quark (uubar, ddbar, ssbar) initiated events produced in e+e- annihilations at LEP. The data were recorded with the OPAL detector at eleven different energies above Z0 peak, corresponding to the full statistics collected at LPE1.5 and LEP2. The difference in mean charged and particle multiplicities for bbbar and light quark events, delta_bl, measured over this energy range is consistent with an energy independent behaviour, as predicted by QCD, but is inconsistent with the prediction of a more phenomenological approach which assumes that the multiplicity accompanying the decay of a heavy quark is independent of the quark mass itself. Our results, which can be combined into the single measurement delta_bl = 3.44+-0.40(stat)+-0.89(syst) at a luminosity weighted average centre-of mass energy of 195 GeV, are also consistent with an energy independent behaviour as extrapolated from lower energy data.We have measured the mean charged particle multiplicities separately for bbbar, ccbar and light quark (uubar, ddbar, ssbar) initiated events produced in e+e- annihilations at LEP. The data were recorded with the OPAL detector at eleven different energies above Z0 peak, corresponding to the full statistics collected at LPE1.5 and LEP2. The difference in mean charged and particle multiplicities for bbbar and light quark events, delta_bl, measured over this energy range is consistent with an energy independent behaviour, as predicted by QCD, but is inconsistent with the prediction of a more phenomenological approach which assumes that the multiplicity accompanying the decay of a heavy quark is independent of the quark mass itself. Our results, which can be combined into the single measurement delta_bl = 3.44+-0.40(stat)+-0.89(syst) at a luminosity weighted average centre-of mass energy of 195 GeV, are also consistent with an energy independent behaviour as extrapolated from lower energy data.We have measured the mean charged particle multiplicities separately for b b ̄ , c c ̄ and light quark ( u u ̄ , d d ̄ , s s ̄ ) initiated events produced in e + e − annihilations at LEP. The data were recorded with the OPAL detector at eleven different energies above the Z 0 peak, corresponding to the full statistics collected at LEP1.5 and LEP2
Global Behavior of Spherically Symmetric Navier-Stokes Equations with
  Density-Dependent Viscosity

In this paper, we study a free boundary problem for compressible spherically
symmetric Navier-Stokes equations without a solid core. Under certain
assumptions imposed on the initial data, we obtain the global existence and
uniqueness of the weak solution, give some uniform bounds (with respect to
time) of the solution and show that it converges to a stationary one as time
tends to infinity. Moreover, we obtain the stabilization rate estimates of
exponential type in $L^\infty$-norm and weighted $H^1$-norm of the solution by
constructing some Lyapunov functionals. The results show that such system is
stable under the small perturbations, and could be applied to the astrophysics.Comment: 38 page
High-$p_T$ Hadron Spectra, Azimuthal Anisotropy and Back-to-Back
  Correlations in High-energy Heavy-ion Collisions

The observed suppression of high-$p_T$ hadron spectra, finite azimuthal
anisotropy, disappearance of jet-like back-to-back correlations, and their
centrality dependence in $Au+Au$ collisions at RHIC are shown to be
quantitatively described by jet quenching within a pQCD parton model. The
difference between $h^{\pm}$ and $\pi^0$ suppression in intermediate $p_T$ is
consistent with the observed $(K+p)/\pi$ enhancement which should disappear at
$p_T>6$ GeV/$c$. The suppression of back-to-back correlations is shown to be
directly related to the medium modification of jet fragmentation functions(FF).Comment: 4 pages in RevTex with 4 figures, some typos corrected in the last
  versio
Matrices, moments and rational quadrature

15 pages, no figures.-- MSC2000 code: 65D15.MR#: MR2456794 (2009h:65035)Zbl#: Zbl pre05362059^aMany problems in science and engineering require the evaluation of functionals of the form $$ F_u(A)=u^\ssf Tf(A)u $$, where A is a large symmetric matrix, u a vector, and f a nonlinear function. A popular and fairly inexpensive approach to determining upper and lower bounds for such functionals is based on first carrying out a few steps of the Lanczos procedure applied to A with initial vector u, and then evaluating pairs of Gauss and Gauss–Radau quadrature rules associated with the tridiagonal matrix determined by the Lanczos procedure. The present paper extends this approach to allow the use of rational Gauss quadrature rules.Publicad
One-loop beta-function for an infinite-parameter family of gauge
  theories

We continue to study an infinite-parametric family of gauge theories with an
arbitrary function of the self-dual part of the field strength as the
Lagrangian. The arising one-loop divergences are computed using the background
field method. We show that they can all be absorbed by a local redefinition of
the gauge field, as well as multiplicative renormalisations of the couplings.
Thus, this family of theories is one-loop renormalisable. The infinite set of
beta-functions for the couplings is compactly stored in a renormalisation group
flow for a single function of the curvature. The flow is obtained explicitly.Comment: 17 pages, no figure
Massive Born--Infeld and Other Dual Pairs

We consider massive dual pairs of p-forms and (D-p-1)-forms described by
non-linear Lagrangians, where non-linear curvature terms in one theory
translate into non-linear mass-like terms in the dual theory. In particular,
for D=2p and p even the two non-linear structures coincide when the non-linear
massless theory is self-dual. This state of affairs finds a natural realization
in the four-dimensional massive N=1 supersymmetric Born-Infeld action, which
describes either a massive vector multiplet or a massive linear (tensor)
multiplet with a Born-Infeld mass-like term. These systems should play a role
for the massive gravitino multiplet obtained from a partial super-Higgs in N=2
Supergravity.Comment: 17 pages, LaTeX. Misprints corrected. Final version to appear in JHE