pinecone/core-2020-05-10-deduplication huggingface dataset:
p-wave Holographic Superconductors and five-dimensional gauged
  Supergravity

We explore five-dimensional ${\cal N}=4$ $SU(2)\times U(1)$ and ${\cal N}=8$
SO(6) gauged supergravities as frameworks for condensed matter applications.
These theories contain charged (dilatonic) black holes and 2-forms which have
non-trivial quantum numbers with respect to U(1) subgroups of SO(6). A question
of interest is whether they also contain black holes with two-form hair with
the required asymptotic to give rise to holographic superconductivity. We first
consider the ${\cal N}=4$ case, which contains a complex two-form potential
$A_{\mu\nu}$ which has U(1) charge $\pm 1$. We find that a slight
generalization, where the two-form potential has an arbitrary charge $q$, leads
to a five-dimensional model that exhibits second-order superconducting
transitions of p-wave type where the role of order parameter is played by
$A_{\mu\nu}$, provided $q \gtrsim 5.6$. We identify the operator that condenses
in the dual CFT, which is closely related to ${\cal N}=4$ Super Yang-Mills
theory with chemical potentials. Similar phase transitions between R-charged
black holes and black holes with 2-form hair are found in a generalized version
of the ${\cal N}=8$ gauged supergravity Lagrangian where the two-forms have
charge $q\gtrsim 1.8$.Comment: 35 pages, 14 figure
Absence of sign problem in two-dimensional N=(2,2) super Yang-Mills on
  lattice

We show that N=(2,2) SU(N) super Yang-Mills theory on lattice does not have
sign problem in the continuum limit, that is, under the phase-quenched
simulation phase of the determinant localizes to 1 and hence the phase-quench
approximation becomes exact. Among several formulations, we study models by
Cohen-Kaplan-Katz-Unsal (CKKU) and by Sugino. We confirm that the sign problem
is absent in both models and that they converge to the identical continuum
limit without fine tuning. We provide a simple explanation why previous works
by other authors, which claim an existence of the sign problem, do not capture
the continuum physics.Comment: 27 pages, 24 figures; v2: comments and references added; v3: figures
  on U(1) mass independence and references added, to appear in JHE
A subtraction scheme for computing QCD jet cross sections at NNLO:
  integrating the iterated singly-unresolved subtraction terms

We perform the integration of all iterated singly-unresolved subtraction
terms, as defined in ref. [1], over the two-particle factorized phase space. We
also sum over the unresolved parton flavours. The final result can be written
as a convolution (in colour space) of the Born cross section and an insertion
operator. We spell out the insertion operator in terms of 24 basic integrals
that are defined explicitly. We compute the coefficients of the
Laurent-expansion of these integrals in two different ways, with the method of
Mellin-Barnes representations and sector decomposition. Finally, we present the
Laurent-expansion of the full insertion operator for the specific examples of
electron-positron annihilation into two and three jets.Comment: 83 pages, one reference added, typos corrected, agrees with published
  versio
Multiple Parton Interactions in Z+jets production at the LHC. A
  comparison of factorized and non--factorized double parton distribution
  functions

We examine the contribution of Multiple Parton Interactions to Z+n-jets
production at the LHC, n=2,3,4, where the Z boson is assumed to decay
leptonically. We compare the results obtained with the correlated GS09 double
parton distribution function with those obtained with two instances of fully
factorized single parton distribution functions: MSTW2008LO and CTEQ6LO. It
appears quite feasible to measure the MPI contribution to Z+2/3/4 jets already
in the first phase of the LHC with a total luminosity of one inverse femtobarn
at 7 TeV. If as expected the trigger threshold for single photons is around 80
GeV, Z+2-jets production may well turn out to be more easily observable than
the gamma+3-jets channel. The MPI cross section is dominated by relatively soft
events with two jets balancing in transverse momentum.Comment: 15 pages, 3 plot
SUSY Splits, But Then Returns

We study the phenomenon of accidental or "emergent" supersymmetry within
gauge theory and connect it to the scenarios of Split Supersymmetry and Higgs
compositeness. Combining these elements leads to a significant refinement and
extension of the proposal of Partial Supersymmetry, in which supersymmetry is
broken at very high energies but with a remnant surviving to the weak scale.
The Hierarchy Problem is then solved by a non-trivial partnership between
supersymmetry and compositeness, giving a promising approach for reconciling
Higgs naturalness with the wealth of precision experimental data. We discuss
aspects of this scenario from the AdS/CFT dual viewpoint of higher-dimensional
warped compactification. It is argued that string theory constructions with
high scale supersymmetry breaking which realize warped/composite solutions to
the Hierarchy Problem may well be accompanied by some or all of the features
described. The central phenomenological considerations and expectations are
discussed, with more detailed modelling within warped effective field theory
reserved for future work.Comment: 29 pages. Flavor and CP constraints on left-right symmetric structure
  briefly discussed. References adde
Generalized geometry, calibrations and supersymmetry in diverse
  dimensions

We consider type II backgrounds of the form R^{1,d-1} x M^{10-d} for even d,
preserving 2^{d/2} real supercharges; for d = 4, 6, 8 this is minimal
supersymmetry in d dimensions, while for d = 2 it is N = (2,0) supersymmetry in
two dimensions. For d = 6 we prove, by explicitly solving the Killing-spinor
equations, that there is a one-to-one correspondence between background
supersymmetry equations in pure-spinor form and D-brane generalized
calibrations; this correspondence had been known to hold in the d = 4 case.
Assuming the correspondence to hold for all d, we list the calibration forms
for all admissible D-branes, as well as the background supersymmetry equations
in pure-spinor form. We find a number of general features, including the
following: The pattern of codimensions at which each calibration form appears
exhibits a (mod 4) periodicity. In all cases one of the pure-spinor equations
implies that the internal manifold is generalized Calabi-Yau. Our results are
manifestly invariant under generalized mirror symmetry.Comment: 28 pages, 1 tabl
Cosmic Ray Anomalies from the MSSM?

The recent positron excess in cosmic rays (CR) observed by the PAMELA
satellite may be a signal for dark matter (DM) annihilation. When these
measurements are combined with those from FERMI on the total ($e^++e^-$) flux
and from PAMELA itself on the $\bar p/p$ ratio, these and other results are
difficult to reconcile with traditional models of DM, including the
conventional mSUGRA version of Supersymmetry even if boosts as large as
$10^{3-4}$ are allowed. In this paper, we combine the results of a previously
obtained scan over a more general 19-parameter subspace of the MSSM with a
corresponding scan over astrophysical parameters that describe the propagation
of CR. We then ascertain whether or not a good fit to this CR data can be
obtained with relatively small boost factors while simultaneously satisfying
the additional constraints arising from gamma ray data. We find that a specific
subclass of MSSM models where the LSP is mostly pure bino and annihilates
almost exclusively into $\tau$ pairs comes very close to satisfying these
requirements. The lightest $\tilde \tau$ in this set of models is found to be
relatively close in mass to the LSP and is in some cases the nLSP. These models
lead to a significant improvement in the overall fit to the data by an amount
$\Delta \chi^2 \sim 1/$dof in comparison to the best fit without Supersymmetry
while employing boosts $\sim 100$. The implications of these models for future
experiments are discussed.Comment: 57 pages, 31 figures, references adde
On the effective theory of long open strings

We study the general low-energy effective action on long open strings, such
as confining strings in pure gauge theories. Using Lorentz invariance, we find
that for a string of length R, the leading deviation from the Nambu-Goto energy
levels generically occurs at order 1/R^4 (including a correction to the ground
state energy), as opposed to 1/R^5 for excited closed strings in four
dimensions, and 1/R^7 for closed strings in three dimensions. This is true both
for Dirichlet and for Neumann boundary conditions for the transverse
directions, though the worldsheet boundary actions are different. The Dirichlet
case is relevant (for instance) for the force between external quarks in a
confining gauge theory, and the Neumann case for a string stretched between
domain walls. In the specific case of confining gauge theories with a weakly
curved holographic dual, we compute the coefficient of the leading correction
when the open string ends on two D-branes, and find a non-vanishing result.Comment: 51 pages, JHEP format. v2: added reference
Fusion of line operators in conformal sigma-models on supergroups, and
  the Hirota equation

We study line operators in the two-dimensional sigma-model on PSl(n|n) using
the current-current OPEs. We regularize and renormalize these line operators,
and compute their fusion up to second order in perturbation theory. In
particular we show that the transfer matrix associated to a one-parameter
family of flat connections is free of divergences. Moreover this transfer
matrix satisfies the Hirota equation (which can be rewritten as a Y-system, or
Thermodynamic Bethe Ansatz equations) for all values of the two parameters
defining the sigma-model. This provides a first-principles derivation of the
Hirota equation which does not rely on the string hypothesis nor on the
assumption of quantum integrability.Comment: 53 pages, 6 figures. Minor correction
The electrostatic view on M-theory LLM geometries

We describe the geometry of the R x SO(3) x SO(6) x U(1) invariant half-BPS
M-theory configurations considered in LLM in terms of their electrostatic
variables. We discuss both regular configurations, such as AdS_4 x S^7 and
AdS_7 x S^4 vacua or simple excited solutions, and singular ones such as the
superstar geometries. This allows us to identify the appropriate boundary
conditions describing the most general smooth and superstar-like singular
configurations. We also compute their masses, matching the expected result from
their microscopic interpretation, but now at finite radius of curvature.Comment: 35 page
Inclusive double-quarkonium production at the Large Hadron Collider

Based on the nonrelativistic QCD (NRQCD) factorization formalism, we
investigate inclusive productions of two spin-triplet S-wave quarkonia
pp->2J/psi+X, 2Upsilon+X, and J/psi+Upsilon+X at the CERN Large Hadron
Collider. The total production rates integrated over the rapidity (y) and
transverse-momentum (p_T) ranges |y|<2.4 and p_T<50 GGeV are predicted to be
sigma[pp->2J/psi+X] = 22 (35) nb, sigma[pp->2Upsilon+X] = 24 (49) pb, and
sigma[pp->J/psi+Upsilon+X] = 7 (13) pb at the center-of-momentum energy sqrt{s}
= 7 (14) TeV. In order to provide predictions that can be useful in both small-
and large-p_T regions, we do not employ the fragmentation approximation and we
include the spin-triplet S-wave color-singlet and color-octet channels for each
quarkonium final state at leading order in the strong coupling. The p_T
distributions of pp->2J/psi+X and 2Upsilon+X in the low-p_T region are
dominated by the color-singlet contributions. At leading order in the strong
coupling, the color-singlet channel is absent for pp->J/psi+Upsilon+X.
Therefore, the process pp->J/psi+Upsilon+X may provide a useful probe to the
color-octet mechanism of NRQCD.Comment: 26 pages, 7 figures, 3 tables, version published in JHE
On Moduli Stabilisation and de Sitter Vacua in MSSM Heterotic Orbifolds

We study the problem of moduli stabilisation in explicit heterotic orbifold
compactifications, whose spectra contain the MSSM plus some vector-like exotics
that can be decoupled. Considering all the bulk moduli, we obtain the 4D low
energy effective action for the compactification, which has contributions from
various, computable, perturbative and non-perturbative effects. Hidden sector
gaugino condensation and string worldsheet instantons result in a combination
of racetrack, KKLT and cusp-form contributions to the superpotential, which
lift all the bulk moduli directions. We point out the properties observed in
our concrete models, which tend to be missed when only "generic" features of a
model are assumed. We search for interesting vacua and find several de Sitter
solutions, but -- so far -- they all turn out to be unstable.Comment: 55 pages, 2 figures, v2: added link to mathematica files, other minor
  revisions, matches JHEP versio
A Direct Proof of BCFW Recursion for Twistor-Strings

This paper gives a direct proof that the leading trace part of the genus zero
twistor-string path integral obeys the BCFW recursion relation. This is the
first complete proof that the twistor-string correctly computes all tree
amplitudes in maximally supersymmetric Yang-Mills theory. The recursion has a
beautiful geometric interpretation in twistor space that closely reflects the
structure of BCFW recursion in momentum space, both on the one hand as a
relation purely among tree amplitudes with shifted external momenta, and on the
other as a relation between tree amplitudes and leading singularities of higher
loop amplitudes. The proof works purely at the level of the string path
integral and is intimately related to the recursive structure of boundary
divisors in the moduli space of stable maps to CP^3.Comment: 23 pages, 5 figure
Global F-theory Models: Instantons and Gauge Dynamics

We elucidate certain aspects of F-theory gauge dynamics, due to quantum
splitting of certain brane stacks, which are absent in the Type IIB limit. We
also provide a working implementation of an algorithm for computing cohomology
of line bundles on arbitrary toric varieties. This should be of general use for
studying the physics of global Type IIB and F-theory models, in particular for
the explicit counting of zero modes for rigid F-theory instantons which
contribute to charged matter couplings. We illustrate the discussion by
constructing and analyzing in detail a compact F-theory GUT model in which a
D-brane instanton generates the top Yukawa coupling non-perturbatively.Comment: 28 pages, 4 figures. v2: Added refs and fixed typos. v3: Rearranged
  section
M-theory and Seven-Dimensional Inhomogeneous Sasaki-Einstein Manifolds

Seven-dimensional inhomogeneous Sasaki-Einstein manifolds $Y^{p,k}(KE_4)$
present a challenging example of AdS/CFT correspondence. At present, their
field theory duals for $KE_4=\mathbb{CP}^2$ base are proposed only within a
restricted range $3p/2\le k \le 2p$ as ${\cal N}=2$ quiver Chern-Simons-matter
theories with $SU(N)\times SU(N)\times SU(N)$ gauge group, nine bifundamental
chiral multiplets interacting through a cubic superpotential. To further
elucidate this correspondence, we use particle approximation both at classical
and quantum level. We setup a concrete AdS/CFT mapping of conserved quantities
using geodesic motions, and turn to solutions of scalar Laplace equation in
$Y^{p,k}$. The eigenmodes also provide an interesting subset of Kaluza-Klein
spectrum for $D=11$ supergravity in ${\rm AdS}_4\times Y^{p,k}$, and are dual
to protected operators written in terms of matter multiplets in the dual
conformal field theory.Comment: v2 refs added. 19 pages 1 figur
Type IIB construction of flavoured ABJ(M) and fractional M2 branes

We study type IIB brane configurations engineering 3d flavoured ABJ(M)
theories with Yang-Mills kinetic terms, which flow to IR fixed points
describing M2 branes at a class of toric Calabi-Yau fourfold singularities. The
type IIB construction provides a bridge between M-theory geometry and field
theory, and allows to identify the superconformal field theories with fixed
quiver diagram, Chern-Simons levels and superpotential, differing by the ranks
of the gauge groups, which we associate to dual AdS_4\timesY_7 backgrounds of
M-theory without or with torsion G-fluxes sourced by fractional M2 branes in
Y_7, when Y_7 is smooth. The analysis includes the Q^{1,1,1} and Y^{1,2}(CP^2)
geometries. We also comment on duality cascades and on the interplay between
torsion G-fluxes in M-theory and partial resolutions.Comment: 38 pages, 17 figures; v2: references added; v3: abstract slightly
  modified, discussion expanded with more emphasis on smooth Sasaki-Einstein
  geometries. 41 pages, version published on JHE
Counting charged massless states in the (0,2) heterotic CFT/geometry
  connection

We use simple current techniques and their relation to orbifolds with
discrete torsion for studying the (0,2) CFT/geometry duality with non-rational
internal N=2 SCFTs. Explicit formulas for the charged spectra of heterotic
SO(10) GUT models are computed in terms of their extended Poincar\'{e}
polynomials and the complementary Poincar\'{e} polynomial which can be computed
in terms of the elliptic genera. While non-BPS states contribute to the charged
spectrum, their contributions can be determined also for non-rational cases.
For model building, with generalizations to SU(5) and SM gauge groups, one can
take advantage of the large class of Landau-Ginzburg orbifold examples.Comment: 51 pages. Acknowledgments update
On tree amplitudes with gluons coupled to gravitons

In this paper, we study the tree amplitudes with gluons coupled to gravitons.
We first study the relations among the mixed amplitudes. With BCFW on-shell
recursion relation, we will show the color-order reversed relation,
$U(1)$-decoupling relation and KK relation hold for tree amplitudes with gluons
coupled to gravitons. We then study the disk relation which expresses mixed
amplitudes by pure gluon amplitudes. More specifically we will prove the disk
relation for mixed amplitudes with gluons coupled to one graviton. Using the
disk relation and the properties of pure gluon amplitudes, the color-order
reversed relation, $U(1)$-decoupling relation and KK relation for mixed
amplitudes can also be proved. Finally, we give some brief discussions on
BCJ-like relation for mixed amplitudes.Comment: 33pages,no figur
Hamiltonian analysis of BHT massive gravity

We study the Hamiltonian structure of the Bergshoeff-Hohm-Townsend (BHT)
massive gravity with a cosmological constant. In the space of coupling
constants $(\Lambda_0,m^2)$, our canonical analysis reveals the special role of
the condition $\Lambda_0/m^2\neq-1$. In this sector, the dimension of the
physical phase space is found to be $N^*=4$, which corresponds to two
Lagrangian degree of freedom. When applied to the AdS asymptotic region, the
canonical approach yields the conserved charges of the BTZ black hole, and
central charges of the asymptotic symmetry algebra.Comment: LATEX, 21 pages; v2: minor correction
Asymptotically Schroedinger Space-Times: TsT Transformations and
  Thermodynamics

We study the complete class of 5-dimensional asymptotically Schroedinger
space-times that can be obtained as the TsT transform of a 5-dimensional
asymptotically AdS space-time. Based on this we identify a conformal class of
Schroedinger boundaries. We use a Fefferman-Graham type expansion to study the
on-shell action for this class of asymptotically Schroedinger space-times and
we show that its value is TsT invariant. In the second part we focus on black
hole space-times and prove that black hole thermodynamics is also TsT
invariant. We use this knowledge to argue that thermal global Schroedinger
space-time at finite chemical potential undergoes a Hawking-Page type phase
transition.Comment: References adde
Heavy Flavour Production at Tevatron and Parton Shower Effects

We present hadron-level predictions from the Monte Carlo generator Cascade
and numerical calculations of charm and beauty production at the Fermilab
Tevatron within the framework of the $k_T$-factorization QCD approach. Our
consideration is based on the CCFM-evolved unintegrated gluon densities in a
proton. The performed analysis covers the total and differential cross sections
of open charm and beauty quarks, $B$ and $D$ mesons (or rather muons from their
semileptonic decays) and the total and differential cross sections of $b \bar
b$ di-jet hadroproduction. We study the theoretical uncertainties of our
calculations and investigate the effects coming from parton showers in initial
and final states. Our predictions are compared with the recent experimental
data taken by the D0 and CDF collaborations. Special attention is put on the
specific angular correlations between the final-state particles. We demonstrate
that the final state parton shower plays a crucial role in the description of
such observables. The decorrelated part of angular separations can be fully
described, if the process $gg^*\rightarrow gg$ is included.Comment: Fig 8,9 10 replaced, small corrections in text A discussion of the
  delta phi results is adde
Continuous Hawking-Page transitions in Einstein-scalar gravity

We investigate continuous Hawking-Page transitions in Einstein's gravity
coupled to a scalar field with an arbitrary potential in the weak gravity
limit. We show that this is only possible in a singular limit where the
black-hole horizon marginally traps a curvature singularity. Depending on the
subleading terms in the potential, a rich variety of continuous phase
transitions arise. Our examples include second and higher order, including the
Berezinskii-Kosterlitz-Thouless type. In the case when the scalar is dilaton,
the condition for a continuous phase transition lead to (asymptotically)
linear-dilaton background. We obtain the scaling laws of thermodynamic
functions, as well as the viscosity coefficients near the transition. In the
limit of weak gravitational interactions, the bulk viscosity asymptotes to a
universal constant, independent of the details of the scalar potential. As a
byproduct of our analysis we obtain a one-parameter family of kink solutions in
arbitrary dimension d that interpolate between AdS near the boundary and
linear-dilaton background in the deep interior. The continuous Hawking-Page
transitions found here serve as holographic models for normal-to superfluid
transitions.Comment: 35 pages + appendice
Moduli Thermalization and Finite Temperature Effects in "Big" Divisor
  Large Volume D3/D7 Swiss-Cheese Compactification

In the context of Type IIB compactified on a large volume Swiss-Cheese
orientifold in the presence of a mobile space-time filling D3-brane and stacks
of fluxed D7-branes wrapping the "big" divisor Sigma_B of a Swiss-Cheese Calabi
Yau in WCP^4 [1,1,1,6,9], we explore various implications of moduli dynamics
and discuss their couplings and decay into MSSM (-like) matter fields early in
the history of universe to reach thermal equilibrium. Like finite temperature
effects in O'KKLT, we observe that the local minimum of zero-temperature
effective scalar potential is stable against any finite temperature corrections
(up to two-loops) in large volume scenarios as well. Also, we find that moduli
are heavy enough to avoid any cosmological moduli problem.Comment: 23 pages, 3 tables, LaTeX, references added, to appear in JHE