pinecone/core-2020-05-10-deduplication huggingface dataset:
The low energy limit of the AdS(3) x S(3) x M(4) spinning string

We derive the low-energy effective action for the spinning (GKP) string in
AdS(3) x S(3) x M(4) where M(4) = S(3) x S(1) or T(4). In the first case the
action consists of two O(4) non-linear sigma models which are coupled through
their interaction with four massless Majorana fermions (plus one free decoupled
scalar). While in the second case it consists of one O(4) sigma model coupled
to four Majorana fermions together with four free scalars from the T(4). We
show that these models are classically integrable by constructing their Lax
connections.Comment: 13 page
Vacuum Instability in Electric Fields via AdS/CFT: Euler-Heisenberg
  Lagrangian and Planckian Thermalization

We analyze vacuum instability of strongly coupled gauge theories in a
constant electric field using AdS/CFT correspondence. The model is the N=2
1-flavor supersymmetric large N_c QCD in the strong 't Hooft coupling limit. We
calculate the Euler-Heisenberg effective Lagrangian L(E), which encodes the
nonlinear response and the quantum decay rate of the vacuum in a background
electric field E, from the complex D-brane action in AdS/CFT. We find that the
decay rate given by Im L(E) becomes nonzero above a critical electric field set
by the confining force between quarks. A large-E expansion of Im L(E) is found
to coincide with that of the Schwinger effects in QED, replacing its electron
mass by the confining force. Then, the time-dependent response of the system in
a strong electric field is solved non-perturbatively, and we observe a
universal thermalization at a shortest timescale "Planckian thermalization
time" t ~ 1/T ~ E^{-1/2}. Here, T is an effective temperature which quarks feel
in the nonequilibrium state with nonzero electric current, calculated in
AdS/CFT as a Hawking temperature. Stronger electric fields accelerate the
thermalization, and for a realistic value of the electric field in RHIC
experiment, we obtain t ~ 1 [fm/c], which is consistent with the believed
value.Comment: 41 page
Reanalysis of the BFKL Pomeron at the next-to-leading logarithmic
  accuracy

We apply the principle of maximum conformality (PMC) to the
Balitsky-Fadin-Kuraev-Lipatov (BFKL) Pomeron intercept at the next-to-leading
logarithmic (NLL) accuracy. The PMC eliminates the conventional renormalization
scale ambiguity by absorbing the non-conformal $\{\beta_i\}$-terms into the
running coupling, and a more accurate pQCD estimation can be obtained. After
PMC scale setting, the QCD perturbative convergence can be greatly improved due
to the elimination of renormalon terms in pQCD series, and the BFKL Pomeron
intercept has a weak dependence on the virtuality of the reggeized gluon. For
example, by taking the Fried-Yennie gauge, we obtain $\omega_{\rm MOM}^{\rm
PMC}(Q^{2},0)\in [0.149,0.176]$ for $Q^2\in[1,100]\;{\rm GeV}^2$. This is a
good property to apply to the high-energy phenomenology. Further more, to
compare with the data, it is found that the physical ${\rm MOM}$-scheme is more
reliable than the $\overline{\rm MS}$-scheme. The ${\rm MOM}$-scheme is gauge
dependent, which can also be greatly suppressed after PMC scale setting. We
discuss the MOM-scheme gauge dependence for the Pomeron intercept by adopting
three gauges, i.e. the Landau gauge, the Feynman gauge and the Fried-Yennie
gauge, and we obtain $\omega_{\rm MOM}^{\rm PMC}(Q^{2}=15\;{\rm GeV}^2,0) =
0.166^{+0.010}_{-0.017}$; i.e. about $10\%$ gauge dependence is observed. We
apply the BFKL Pomeron intercept to the photon-photon collision process, and
compare the theoretical predictions with the data from the OPAL and L3
experiments.Comment: 18 pages, 6 figures. References updated and discussions improve
Testable two-loop radiative neutrino mass model based on an $LLQd^cQd^c$
  effective operator

A new two-loop radiative Majorana neutrino mass model is constructed from the
gauge-invariant effective operator $L^i L^j Q^k d^c Q^l d^c \epsilon_{ik}
\epsilon_{jl}$ that violates lepton number conservation by two units. The
ultraviolet completion features two scalar leptoquark flavors and a color-octet
Majorana fermion. We show that there exists a region of parameter space where
the neutrino oscillation data can be fitted while simultaneously meeting
flavor-violation and collider bounds. The model is testable through lepton
flavor-violating processes such as ${\mu} \to e{\gamma}$, $\mu \to eee$, and
$\mu N \to eN$ conversion, as well as collider searches for the scalar
leptoquarks and color-octet fermion. We computed and compiled a list of
necessary Passarino-Veltman integrals up to boxes in the approximation of
vanishing external momenta and made them available as a Mathematica package,
denoted as ANT.Comment: 42 pages, 11 figures, typo in Eq. (4.9) as well as wrong chirality
  structures in Secs. 4.5 and 5.2 corrected, final results unchange
How robust is a thermal photon interpretation of the ALICE low-p_T data?

We present a rigorous theoretical analysis of the ALICE measurement of
low-p_T direct-photon production in central lead-lead collisions at the LHC
with a centre-of-mass energy of \sqrt{s_{NN}}=2.76 TeV. Using NLO QCD, we
compute the relative contributions to prompt-photon production from different
initial and final states and the theoretical uncertainties coming from
independent variations of the renormalisation and factorisation scales, the
nuclear parton densities and the fragmentation functions. Based on different
fits to the unsubtracted and prompt-photon subtracted ALICE data, we
consistently find T = 304 \pm 58 MeV and 309 \pm 64 MeV for the effective
temperature of the quark-gluon plasma (or hot medium) at p_T \in [0.8;2.2] GeV
and p_T \in [1.5;3.5] GeV as well as a power-law (p_T^{-4}) behavior for p_T >
4 GeV as predicted by QCD hard scattering.Comment: 18 pages, 7 figures, 1 tabl
In Wino Veritas? Indirect Searches Shed Light on Neutralino Dark Matter

Indirect detection constraints on gamma rays (both continuum and lines) have
set strong constraints on wino dark matter. By combining results from Fermi-LAT
and HESS, we show that: light nonthermal wino dark matter is strongly excluded;
thermal wino dark matter is allowed only if the Milky Way dark matter
distribution has a significant (>~0.4 kpc) core; and for plausible NFW and
Einasto distributions the entire range of wino masses from 100 GeV up to 3 TeV
can be excluded. The case of light, nonthermal wino dark matter is particularly
interesting in scenarios with decaying moduli that reheat the universe to a low
temperature. Typically such models have been discussed for low reheating
temperatures, not far above the BBN bound of a few MeV. We show that
constraints on the allowed wino relic density push such models to higher
reheating temperatures and hence heavier moduli. Even for a flattened halo
model consisting of an NFW profile with constant-density core inside 1 kpc and
a density near the sun of 0.3 GeV/cm^3, for 150 GeV winos current data
constrains the reheat temperature to be above 1.4 GeV. As a result, for models
in which the wino mass is a loop factor below the gravitino mass, the data
favor moduli that are more than an order of magnitude heavier than the
gravitino. We discuss some of the sobering implications of this result for the
status of supersymmetry. We also comment on other neutralino dark matter
scenarios, in particular the case of mixed bino/higgsino dark matter. We show
that in this case, direct and indirect searches are complementary to each other
and could potentially cover most of the parameter space
Black branes in flux compactifications

We construct charged black branes in type IIA flux compactifications that are
dual to (2+1)-dimensional field theories at finite density. The internal space
is a general Calabi-Yau manifold with fluxes, with internal dimensions much
smaller than the AdS radius. Gauge fields descend from the 3-form RR potential
evaluated on harmonic forms of the Calabi-Yau, and Kaluza-Klein modes decouple.
Black branes are described by a four-dimensional effective field theory that
includes only a few light fields and is valid over a parametrically large range
of scales. This effective theory determines the low energy dynamics, stability
and thermodynamic properties. Tools from flux compactifications are also used
to construct holographic CFTs with no relevant scalar operators, that can lead
to symmetric phases of condensed matter systems stable to very low
temperatures. The general formalism is illustrated with simple examples such as
toroidal compactifications and manifolds with a single size modulus. We
initiate the classification of holographic phases of matter described by flux
compactifications, which include generalized Reissner-Nordstrom branes,
nonsupersymmetric $AdS_2 \times R^2$ and hyperscaling violating solutions.Comment: 37 pages, 2 figures, typos corrected and comments adde
Corrections for tribimaximal, bimaximal and democratic neutrino mixing
  matrices

In this work we analyze the corrections to tribimaximal (TBM), bimaximal (BM)
and democratic (DC) mixing matrices for explaining large reactor mixing angle
$\theta_{13}$ and checking the consistency with other neutrino mixing angles.
The corrections are parameterized in terms of small orthogonal rotations (R)
with corresponding modified PMNS matrix of the form $R_{ij}\cdot U \cdot
R_{kl}$ where $R_{ij}$ is rotation in ij sector and U is any one of these
special matrices. We showed the rotations $R_{13}\cdot U \cdot R_{23}$,
$R_{12}\cdot U \cdot R_{13}$ for BM and $R_{13}\cdot U \cdot R_{13}$ for TBM
perturbative case successfully fit all neutrino mixing angles within $1\sigma$
range. The perturbed PMNS matrix $R_{12}\cdot U \cdot R_{13}$ for DC, TBM and
$R_{23}\cdot U \cdot R_{23}$ for TBM case is successful in producing mixing
angles at 2$\sigma$ level. The other rotation schemes are either excluded or
successful in producing mixing angles at $3\sigma$ level.Comment: 25 pages, 56 figures; v2: new rotation cases with corresponding
  discussion and figures included, new references added, accepted for
  publication in JHE
Cogeneration of Dark Matter and Baryons by Non-Standard-Model Sphalerons
  in Unified Models

Sphalerons of a new gauge interaction can convert a primordial asymmetry in B
or L into a dark matter asymmetry. From the equilibrium conditions for the
sphalerons of both the electroweak and the new interactions, one can compute
the ratios of B, L, and X, where X is the dark matter number, thus determining
the mass of the dark matter particle fairly precisely. Such a scenario can
arise naturally in the context of unification with larger groups. An
illustrative model embeddable in $SU(6) \times SU(2) \subset E_6$ is described
as well as an equally simple model based on SU(7).Comment: 13 pages. Revised introduction and references, changed titl
Mixing with descendant fields in perturbed minimal CFT models

We extend the analysis of the RG trajectory connecting successive minimal CFT
models ${\cal M}_p$ and ${\cal M}_{p-1}$ for $p\gg 1$, performed by A.
Zamolodchikov, to the fields $\varphi_{n,n\pm 3}$. This required a close
investigation of mixing with the descendant fields at the level 2. In
particular we identify those specific linear combinations of UV fields which
flow to the IR fields $\varphi_{n+3,n}$ and $\varphi_{n-3,n}$. We report also
the results of the calculation of the same mixing coefficients through the
recent RG domain wall approach by Gaiotto. These results are in complete
agreement with the leading order perturbation theory.Comment: 13 pages; minor corrections; version published in JHE
Cornering light Neutralino Dark Matter at the LHC

We investigate the current status of the light neutralino dark matter
scenario within the minimal supersymmetric standard model (MSSM) taking into
account latest results from the LHC. A discussion of the relevant constraints,
in particular from the dark matter relic abundance, leads us to a manageable
simplified model defined by a subset of MSSM parameters. Within this simplified
model we reinterpret a recent search for electroweak supersymmetric particle
production based on a signature including multi-taus plus missing transverse
momentum performed by the ATLAS collaboration. In this way we derive stringent
constraints on the light neutralino parameter space. In combination with
further experimental information from the LHC, such as dark matter searches in
the monojet channel and constraints on invisible Higgs decays, we obtain a
lower bound on the lightest neutralino mass of about 24 GeV. This limit is
stronger than any current limit set by underground direct dark matter searches
or indirect detection experiments. With a mild improvement of the sensitivity
of the multi-tau search, light neutralino dark matter can be fully tested up to
about 30 GeV.Comment: 26 pages, 11 figures. v2: version published in JHE
Is Natural SUSY Natural?

We study the fine tuning associated to a `Natural Supersymmetry' spectrum
with stops, after RG running, significantly lighter than the first two
generation sfermions and the gluino. In particular, we emphasise that this
tuning should be measured with respect to the parameters taken to be
independent at the assumed UV boundary of the renormalisation group flow, and
improve the accuracy of previous approximate expressions. It is found that, if
running begins at $10^{16}~\rm{GeV}$ $\left(10^5~\rm{GeV}\right)$, decreasing
the UV stop mass below $0.75$ $\left(0.4\right)$ of the weak scale Majorana
gluino mass does not improve the overall fine tuning of the theory. In
contrast, it is possible to raise the first two generation sfermion masses out
of LHC reach without introducing additional tuning. After running, regions of
parameter space favoured by naturalness and consistent with LHC bounds
typically have IR stop masses of order 1.5 TeV (0.75 TeV), and fine tuning of
at least 400 (50) for high (low) scale mediation. We also study the fine tuning
of theories with Dirac gluinos. These allow for substantial separation of the
gluino and sfermion masses and, regardless of the scale of mediation, lead to
relatively low fine tuning of order 50. Hence viable models can still favour
light stops, but this requires extra structure beyond the MSSM field content.Comment: 26 pages, 8 figures, V3: JHEP versio
Measuring extended Higgs sectors as a consistent free couplings model

Extended Higgs sectors appear in many models for physics beyond the Standard
Model. Current Higgs measurements at the LHC are starting to significantly
constrain them. We study their Higgs coupling patterns at tree level as well as
including quantum corrections. Our benchmarks include a dark singlet-doublet
extension and several two-doublet setups. Using SFitter we translate the
current Higgs coupling measurements for one light Higgs state into their
respective parameter spaces. Finally, we show how two-Higgs-doublet models can
serve as a consistent ultraviolet completion of an assumed single
Standard-Model-like Higgs boson with free couplings.Comment: 49 pages, including the updated SFitter Higgs couplings results for
  the Standard Mode
Integrable Wilson loops

The generalized quark-antiquark potential of N=4 supersymmetric Yang-Mills
theory on S^3 x R calculates the potential between a pair of heavy charged
particles separated by an arbitrary angle on S^3 and also an angle in flavor
space. It can be calculated by a Wilson loop following a prescribed path and
couplings, or after a conformal transformation, by a cusped Wilson loop in flat
space, hence also generalizing the usual concept of the cusp anomalous
dimension. In AdS_5 x S^5 this is calculated by an infinite open string. I
present here an open spin-chain model which calculates the spectrum of
excitations of such open strings. In the dual gauge theory these are cusped
Wilson loops with extra operator insertions at the cusp. The boundaries of the
spin-chain introduce a non-trivial reflection phase and break the bulk symmetry
down to a single copy of psu(2|2). The dependence on the two angles is captured
by the two embeddings of this algebra into \psu(2|2)^2, i.e., by a global
rotation. The exact answer to this problem is conjectured to be given by
solutions to a set of twisted boundary thermodynamic Bethe ansatz integral
equations. In particular the generalized quark-antiquark potential or cusp
anomalous dimension is recovered by calculating the ground state energy of the
minimal length spin-chain, with no sites. It gets contributions only from
virtual particles reflecting off the boundaries. I reproduce from this
calculation some known weak coupling perturtbative results.Comment: 40 pages, 11 figures; v2-some formulas corrected, results unchange
Mild-split SUSY with flavor

In the framework of a gauge mediated quiver-like model, the standard model
flavor texture can be naturally generated. The model - like the MSSM - has
furthermore a region in parameter space where the lightest Higgs mass is fed by
heavy stop loops, which in turn sets the average squark mass scale near 10-20
TeV. We perform a careful flavor analysis to check whether this type of
mild-split SUSY passes all flavor constraints as easily as envisioned in the
original type of split SUSY. Interestingly, it turns out to be on the border of
several constraints, in particular, the branching ratio of mu -> e gamma and,
if order one complex phases are assumed, also epsilon_K neutron and electron
EDM. Furthermore, we consider unification as well as dark matter candidates,
especially the gravitino. Finally, we provide a closed-form formula for the
soft masses of matter in arbitrary representations of any of the gauge groups
in a generic quiver-like model with a general messenger sector.Comment: LaTeX, 37 pages, 15 figures; V2: references added, minor corrections
  in sec.
Subset method for one-dimensional QCD

We present a subset method which solves the sign problem for QCD at nonzero
quark chemical potential in 0+1 dimensions. The subsets gather gauge
configurations based on the center symmetry of the SU(3) group. We show that
the sign problem is solved for one to five quark flavors and that it slowly
reappears for a larger number of flavors. We formulate an extension of the
center subsets that solves the sign problem for a larger number of flavors as
well. We also derive some new analytical results for this toy model.Comment: 29 pages, 12 figures; references added, as published in JHE
Scattering in Three Dimensions from Rational Maps

The complete tree-level S-matrix of four dimensional ${\cal N}=4$ super
Yang-Mills and ${\cal N} = 8$ supergravity has compact forms as integrals over
the moduli space of certain rational maps. In this note we derive formulas for
amplitudes in three dimensions by using the fact that when amplitudes are
dressed with proper wave functions dimensional reduction becomes
straightforward. This procedure leads to formulas in terms of rational maps for
three dimensional maximally supersymmetric Yang-Mills and gravity theories. The
integrand of the new formulas contains three basic structures:
Parke-Taylor-like factors, Vandermonde determinants and resultants. Integrating
out some of the Grassmann directions produces formulas for theories with less
than maximal supersymmetry, which exposes yet a fourth kind of structure.
Combining all four basic structures we start a search for consistent S-matrices
in three dimensions. Very nicely, the most natural ones are those corresponding
to ABJM and BLG theories. We also make a connection between the power of a
resultant in the integrand, representations of the Poincar\'e group, infrared
behavior and conformality of a theory. Extensions to other theories in three
dimensions and to arbitrary dimensions are also discussed.Comment: 21 page
Entanglement Temperature in Non-conformal Cases

Potential reconstruction can be used to find various analytical asymptotical
AdS solutions in Einstein dilation system generally. We have generated two
simple solutions without physical singularity called zero temperature
solutions. We also proposed a numerical way to obtain black hole solution in
Einstein dilaton system with special dilaton potential. By using this method,
we obtain the corresponding black hole solutions numerically and investigate
the thermal stability of the black hole by comparing the free energy of thermal
gas and the corresponding black hole. In two groups of non-conformal gravity
solutions obtained in this paper, we find that the two thermal gas solutions
are more unstable than black hole solutions respectively. Finally, we consider
black hole solutions as a thermal state of zero temperature solutions to check
that the first thermal dynamical law exists in entanglement system from
holographic point of view.Comment: 39 pages, 14 figures, version accepted by JHE
Near-Extremal Black Hole Thermodynamics from AdS2/CFT1 Correspondence in
  The Low Energy Limit of 4D Heterotic String Theory

We compute the asymptotic symmetry group of the four dimensional
near-extremal Kerr-Sen black hole within an AdS2/CFT1 correspondence. We do
this by performing a Robinson-Wilczek two dimensional reduction and construct a
quantum theory of the remaining field content. The resulting energy momentum
tensor generates an asymptotic Virasoro algebra, to s-wave, with a calculable
central extension. This center in conjunction with the proper regularized
lowest Virasoro eigen-mode yields the near-extremal Kerr-Sen entropy via the
statistical Cardy formula. Finally we analyze quantum holomorphic fluxes of the
dual CFT giving rise to a finite Hawking temperature weighted by the central
charge of the near-extremal Kerr-Sen metric.Comment: 16 pages, references added, revised for clarity. To appear in JHE
Soft gravitational effects in Kadanoff-Baym approach

In de Sitter space, the gravitational fluctuation at the super-horizon scale
may make physical quantities time dependent by breaking the de Sitter symmetry.
We adopt the Kadanoff-Baym approach to evaluate soft gravitational effects in a
matter system at the sub-horizon scale. This investigation proves that only the
local terms contribute to the de Sitter symmetry breaking at the one-loop
level. The IR singularities in the non-local terms cancel after summing over
degenerate states between real and virtual processes. The corresponding IR
cut-off is given by the energy resolution like QED. Since the energy resolution
is physical and independent of cosmic evolution, the non-local contributions do
not induce the de Sitter symmetry breaking. We can confirm that soft
gravitational effects preserve the effective Lorentz invariance.Comment: 27 page
Hybrid Monte Carlo on Lefschetz Thimbles -- A study of the residual sign
  problem

We consider a hybrid Monte Carlo algorithm which is applicable to lattice
theories defined on Lefschetz thimbles. In the algorithm, any point (field
configuration) on a thimble is parametrized uniquely by the flow-direction and
the flow-time defined at a certain asymptotic region close to the critical
point, and it is generated by solving the gradient flow equation downward. The
associated complete set of tangent vectors is also generated in the same
manner. Molecular dynamics is then formulated as a constrained dynamical
system, where the equations of motion with Lagrange multipliers are solved by
the second-order constraint-preserving symmetric integrator. The algorithm is
tested in the lambda phi^4 model at finite density, by choosing the thimbles
associated with the classical vacua for subcritical and supercritical values of
chemical potential. For the lattice size L=4, we find that the residual sign
factors average to not less than 0.99 and are safely included by reweighting
and that the results of the number density are consistent with those obtained
by the complex Langevin simulations.Comment: 25 pages, 10 figures, references updated, comments added, typos
  correcte