pinecone/core-2020-05-10-deduplication huggingface dataset:
Lorentz Constraints on Massive Three-Point Amplitudes

Using the helicity-spinor language we explore the non-perturbative
constraints that Lorentz symmetry imposes on three-point amplitudes where the
asymptotic states can be massive. As it is well known, in the case of only
massless states the three-point amplitude is fixed up to a coupling constant by
these constraints plus some physical requirements. We find that a similar
statement can be made when some of the particles have mass. We derive the
generic functional form of the three-point amplitude by virtue of Lorentz
symmetry, which displays several functional structures accompanied by arbitrary
constants. These constants can be related to the coupling constants of the
theory, but in an unambiguous fashion only in the case of one massive particle.
Constraints on these constants are obtained by imposing that in the UV limit
the massive amplitude matches the massless one. In particular, there is a
certain Lorentz frame, which corresponds to projecting all the massive momenta
along the same null momentum, where the three-point massive amplitude is fully
fixed, and has a universal form.Comment: 31+10 pages, 0 figures. Relevant improvements of the results.
  Appendix B added. Version accepted by journa
How to save the WIMP: global analysis of a dark matter model with two
  s-channel mediators

A reliable comparison of different dark matter (DM) searches requires models
that satisfy certain consistency requirements like gauge invariance and
perturbative unitarity. As a well-motivated example, we study two-mediator DM
(2MDM). The model is based on a spontaneously broken $U(1)'$ gauge symmetry and
contains a Majorana DM particle as well as two $s$-channel mediators, one
vector (the $Z'$) and one scalar (the dark Higgs). We perform a global scan
over the parameters of the model assuming that the DM relic density is obtained
by thermal freeze-out in the early Universe and imposing a large set of
constraints: direct and indirect DM searches, monojet, dijet and dilepton
searches at colliders, Higgs observables, electroweak precision tests and
perturbative unitarity. We conclude that thermal DM is only allowed either
close to an $s$-channel resonance or if at least one mediator is lighter than
the DM particle. In these cases a thermal DM abundance can be obtained although
DM couplings to the Standard Model are tiny. Interestingly, we find that
vector-mediated DM-nucleon scattering leads to relevant constraints despite the
velocity-suppressed cross section, and that indirect detection can be important
if DM annihilations into both mediators are kinematically allowed.Comment: 30 pages, 9 figures + appendice
Deformations of $W_{A,D,E}$ SCFTs

We discuss aspects of theories with superpotentials given by Arnold's $A,D,E$
singularities, particularly the novelties that arise when the fields are
matrices. We focus on 4d ${\cal N}=1$ variants of susy QCD, with $U(N_c)$ or
$SU(N_c)$ gauge group, $N_f$ fundamental flavors, and adjoint matter fields $X$
and $Y$ appearing in $W_{A,D,E}(X,Y)$ superpotentials. Many of our
considerations also apply in other possible contexts for matrix-variable
$W_{A,D,E}$. The 4d $W_{A,D,E}$ SQCD-type theories RG flow to superconformal
field theories, and there are proposed duals in the literature for the
$W_{A_k}$, $W_{D_k}$, and $W_{E_7}$ cases. As we review, the
$W_{D_\text{even}}$ and $W_{E_7}$ duals rely on a conjectural, quantum
truncation of the chiral ring. We explore these issues by considering various
deformations of the $W_{A,D,E}$ superpotentials, and the resulting RG flows and
IR theories. Rather than finding supporting evidence for the quantum truncation
and $W_{D_\text{even}}$ and $W_{E_7}$ duals, we note some challenging evidence
to the contrary.Comment: 59 pages, many figure
Horizon as Critical Phenomenon

We show that renormalization group(RG) flow can be viewed as a gradual wave
function collapse, where a quantum state associated with the action of field
theory evolves toward a final state that describes an IR fixed point. The
process of collapse is described by the radial evolution in the dual
holographic theory. If the theory is in the same phase as the assumed IR fixed
point, the initial state is smoothly projected to the final state. If in a
different phase, the initial state undergoes a phase transition which in turn
gives rise to a horizon in the bulk geometry. We demonstrate the connection
between critical behavior and horizon in an example, by deriving the bulk
metrics that emerge in various phases of the U(N) vector model in the large N
limit based on the holographic dual constructed from quantum RG. The gapped
phase exhibits a geometry that smoothly ends at a finite proper distance in the
radial direction. The geometric distance in the radial direction measures a
complexity : the depth of RG transformation that is needed to project the
generally entangled UV state to a direct product state in the IR. For gapless
states, entanglement persistently spreads out to larger length scales, and the
initial state can not be projected to the direct product state. The obstruction
to smooth projection at charge neutral point manifests itself as the long
throat in the anti-de Sitter space. The Poincare horizon at infinity marks the
critical point which exhibits a divergent length scale in the spread of
entanglement. For the gapless states with non-zero chemical potential, the bulk
space becomes the Lifshitz geometry with the dynamical critical exponent two.
The identification of horizon as critical point may provide an explanation for
the universality of horizon. We also discuss the structure of the bulk tensor
network that emerges from the quantum RG.Comment: 37 pages, 8 figures; v2) introduction expande
Leading two-loop corrections to the Higgs boson masses in SUSY models
  with Dirac gauginos

We compute the two-loop O(as*at) corrections to the Higgs boson masses in
supersymmetric extensions of the Standard Model with Dirac gaugino masses. We
rely on the effective-potential technique, allow for both Dirac and Majorana
mass terms for the gluinos, and compute the corrections in both the DRbar and
on-shell renormalisation schemes. We give detailed results for the MDGSSM and
the MRSSM, and simple approximate formulae valid in the decoupling limit for
all currently-studied variants of supersymmetric models with Dirac gluinos.
These results represent the first explicit two-loop calculation of Higgs boson
masses in supersymmetric models beyond the MSSM and the NMSSM.Comment: 36 pages, 5 figures; v2: version published in JHE
Universality of anomalous conductivities in theories with
  higher-derivative holographic duals

Anomalous chiral conductivities in theories with global anomalies are
independent of whether they are computed in a weakly coupled quantum (or
thermal) field theory, hydrodynamics, or at infinite coupling from holography.
While the presence of dynamical gauge fields and mixed, gauge-global anomalies
can destroy this universality, in their absence, the non-renormalisation of
anomalous Ward identities is expected to be obeyed at all intermediate coupling
strengths. In holography, bulk theories with higher-derivative corrections
incorporate coupling constant corrections to the boundary theory observables in
an expansion around infinite coupling. In this work, we investigate the
coupling constant dependence and universality of anomalous conductivities (and
thus of the anomalous Ward identities) in general, four-dimensional systems
that possess asymptotically anti-de Sitter holographic duals with a
non-extremal black brane in five dimensions, and anomalous transport introduced
into the boundary theory via the bulk Chern-Simons action. We show that in bulk
theories with arbitrary gauge- and diffeomorphism-invariant higher-derivative
actions, anomalous conductivities, which can incorporate an infinite series of
(inverse) coupling constant corrections, remain universal. Owing to the
existence of the membrane paradigm, the proof reduces to a construction of bulk
effective theories at the horizon and the boundary. It only requires us to
impose the condition of horizon regularity and correct boundary conditions on
the fields. We also discuss ways to violate the universality by violating
conditions for the validity of the membrane paradigm, in particular, by adding
mass to the vector fields (a case with a mixed, gauge-global anomaly) and in
bulk geometries with a naked singularity.Comment: V2: 29 pages, 1 figure, version published in JHE
A note on multiply wound BPS Wilson loops in ABJM

We consider BPS Wilson loops in planar ABJM theory, wound multiple times
around the great circle. We compute the expectation value of the 1/6-BPS and
1/2-BPS Wilson loops to three- and two-loop order in perturbation theory,
respectively, dealing with the combinatorics of multiple winding via recursive
relations. For the 1/6-BPS Wilson loop we perform the computation at generic
framing and at framing 1 we find agreement with the localization result. For
the 1/2-BPS Wilson loop we compute the expectation value at trivial framing and
by comparison with the matrix model expression we extract the framing
dependence of the fermion diagrams.Comment: 40 page
Feebly Interacting Dark Matter Particle as the Inflaton

We present a scenario where a $Z_2$-symmetric scalar field $\phi$ first
drives cosmic inflation, then reheats the Universe but remains
out-of-equilibrium itself, and finally comprises the observed dark matter
abundance, produced by particle decays \`{a} la freeze-in mechanism. We work
model-independently without specifying the interactions of the scalar field
besides its self-interaction coupling, $\lambda\phi^4$, non-minimal coupling to
gravity, $\xi\phi^2R$, and coupling to another scalar field, $g\phi^2\sigma^2$.
We find the scalar field $\phi$ serves both as the inflaton and a dark matter
candidate if $10^{-9}\lesssim \lambda\lesssim g\lesssim 10^{-7}$ and $3
\rm{keV} \lesssim m_{\rm \phi}\lesssim 85 \rm{MeV}$ for $\xi=\mathcal{O}(1)$.
Such a small value of the non-minimal coupling is also found to be of the right
magnitude to produce the observed curvature perturbation amplitude within the
scenario. We also discuss how the model may be distinguished from other
inflationary models of the same type by the next generation CMB satellites.Comment: 14 pages, 2 figures. Typos corrected, references added. To appear in
  JHE
Traces of a triboson resonance

We show that the relatively small but coincident excesses observed around 2
TeV in the ATLAS Run 1 and Run 2 hadronic diboson searches --- when a cut on
the number of tracks in the fat jets is not applied --- and the null results of
all remaining high-mass diboson searches are compatible with the decay of a
triboson resonance $R$ into $WZ$ plus an extra particle $X$. These decays can
take place via new neutral ($Y^0$) or charged ($Y^\pm$) particles, namely $R
\to Y^0 \, W$, with $Y^0 \to Z X$, or $R \to Y^\pm Z$, with $Y^\pm \to W X$. An
obvious candidate for such intermediate particle is a neutral one $Y^0$, given
a $3.9\sigma$ excess found at 650 GeV by the CMS Collaboration in searches for
intermediate mass diboson resonances decaying to $ZV$, with $V=W,Z$. We discuss
discovery strategies for triboson resonances with small modifications of
existing hadronic searches.Comment: LaTeX 32 pages, 38 figures. v2: Figs. 6, 9 and 11 modified. v3: added
  VH search in hadronic final state. v4: final published versio
On gravitational and thermal corrections to vacuum decay

We reconsider gravitational corrections to vacuum decay, confirming and
simplifying earlier results and extending them by allowing for a non-minimal
coupling of the Higgs to gravity. We find that leading-order gravitational
corrections suppress the vacuum decay rate. Furthermore, we compute minor
corrections to thermal vacuum decay in the SM by adding one-loop contributions
to the Higgs kinetic term, two-loop contributions to the Higgs potential and
allowing for time-dependent bounces.Comment: 19 pages, 7 figure
Merging WW and WW+jet with MINLO

We present a simulation program for the production of a pair of W bosons in
association with a jet, that can be used in conjunction with general-purpose
shower Monte Carlo generators, according to the POWHEG method. We have further
adapted and implemented the MINLO' method on top of the NLO calculation
underlying our WW+jet generator. Thus, the resulting simulation achieves NLO
accuracy not only for inclusive distributions in WW+jet production but also WW
production, i.e. when the associated jet is not resolved, without the
introduction of any unphysical merging scale. This work represents the first
extension of the MINLO' method, in its original form, to the case of a genuine
underlying 2->2 process, with non-trivial virtual corrections.Comment: 22 pages, 9 figure
Adiabatic corrections to holographic entanglement in thermofield doubles
  and confining ground states

We study entanglement in states of holographic CFTs defined by Euclidean path
integrals over geometries with slowly varying metrics. In particular, our CFT
spacetimes have $S^1$ fibers whose size $b$ varies along one direction ($x$) of
an ${\mathbb R}^{d-1}$ base. Such examples respect an ${\mathbb R}^{d-2}$
Euclidean symmetry. Treating the $S^1$ direction as time leads to a thermofield
double state on a spacetime with adiabatically varying redshift, while treating
another direction as time leads to a confining ground state with slowly varying
confinement scale. In both contexts the entropy of slab-shaped regions defined
by $|x - x_0| \le L$ exhibits well-known phase transitions at length scales $L=
L_{crit}$ characterizing the CFT entanglements. For the thermofield double, the
numerical coefficients governing the effect of variations in $b(x)$ on the
transition are surprisingly small and exhibit an interesting change of sign:
gradients reduce $L_{crit}$ for $d \le 3$ but increase $L_{crit}$ for $d\ge4$.
This means that, while for general $L > L_{crit}$ they significantly increase
the mutual information of opposing slabs as one would expect, for $d\ge 4$
gradients cause a small decrease near the phase transition. In contrast, for
the confining ground states gradients always decrease $L_{crit}$, with the
effect becoming more pronounced in higher dimensions.Comment: 32 pages, 16 figures, typos fixed and reg. procedure refine
A Holographic Description of Negative Energy States

Using the AdS/CFT duality, we study the expectation value of stress tensor in
$2+1$-dimensional quantum critical theories with a general dynamical scaling
$z$, and explore various constrains on negative energy density for strongly
coupled field theories. The holographic dual theory is the theory of gravity in
3+1-dimensional Lifshitz backgrounds. We adopt a consistent approach to obtain
the boundary stress tensor from bulk construction, which satisfies the trace
Ward identity associated with Lifshitz scaling symmetry. In particular, the
boundary stress tensor, constructed from the gravitational wave deformed
Lifshitz geometry, is found up to second order in gravitational wave
perturbations. {The result} is compared to its counterpart in free {scalar}
field theory at the same order in an expansion of small squeezing parameters.
This allows us to relate the boundary values of gravitational waves to the
squeezing parameters of squeezed vacuum states. We find that, in both cases
with $z=1$, the stress tensor satisfies the averaged null energy condition, and
is consistent with the quantum interest conjecture. Moreover, the negative
lower bound on null-contracted stress tensor, which is averaged over time-like
trajectories along nearly null directions, is obtained. We find a weaker
constraint on the magnitude and duration of negative null energy density in
strongly coupled field theory as compared with the constraint in free
relativistic field theory. The implications are discussed.Comment: This is the version(v2) published in JHE
Thermodynamics and holographic entanglement entropy for spherical black
  holes in 5D Gauss-Bonnet gravity

The holographic entanglement entropy is studied numerically in
(4+1)-dimensional spherically symmetric Gauss-Bonnet AdS black hole spacetime
with compact boundary. On the bulk side the black hole spacetime undergoes a
van der Waals-like phase transition in the extended phase space, which is
reviewed with emphasis on the behavior on the temperature-entropy plane. On the
boundary, we calculated the regularized HEE of a disk region of different
sizes. We find strong numerical evidence for the failure of equal area law for
isobaric curves on the temperature-HEE plane and for the correctness of first
law of entanglement entropy, and briefly give an explanation for why the latter
may serve as a reason for the former, i.e. the failure of equal area law on the
temperature-HEE plane.Comment: 17 pages, 4 PDF figures. Update: journal versio
On circular strings in $(AdS_3 \times S^3)_{\varkappa}$

The so called one-parameter (often called $\varkappa$) deformed $AdS$ string
sigma models have attracted a lot of attention lately in the study of
integrability in string theory. We construct various circular string solutions
in the $(AdS_3 \times S^3)_{\varkappa}$ background and describe the
characteristics of such solutions qualitatively. We study the Bohr-Sommerfeld
like quantization for these string states to characterise the motion. Further
we find a `long' string limit of such circular strings in the
$\varkappa$-deformed $AdS_3$ and find a novel dependence of the oscillation
number on the energy in the next to leading order expansion.Comment: v2: References added, typos correcte
String Theory Origin of Constrained Multiplets

We study the non-linearly realized spontaneously broken supersymmetry of the
(anti-)D3-brane action in type IIB string theory. The worldvolume fields are
one vector $A_\mu$, three complex scalars $\phi^i$ and four 4d fermions
$\lambda^0$, $\lambda^i$. These transform, in addition to the more familiar N=4
linear supersymmetry, also under 16 spontaneously broken, non-linearly realized
supersymmetries. We argue that the worldvolume fields can be packaged into the
following constrained 4d non-linear N=1 multiplets: four chiral multiplets $S$,
$Y^i$ that satisfy $S^2=SY^i=0$ and contain the worldvolume fermions
$\lambda^0$ and $\lambda^i$; and four chiral multiplets $W_\alpha$, $H^i$ that
satisfy $S W_\alpha=0$ and $S \bar D_{\dot \alpha} \bar H^{\bar \imath}=0$ and
contain the vector $A_\mu$ and the scalars $\phi^i$. We also discuss how
placing an anti-D3-brane on top of intersecting O7-planes can lead to an
orthogonal multiplet $\Phi$ that satisfies $S(\Phi-\bar \Phi)=0$, which is
particularly interesting for inflationary cosmology.Comment: 28 pages, v2: published version, 1 reference adde
Multimetric Supergravities

Making use of integral forms and superfield techniques we propose
supersymmetric extensions of the multimetric gravity Lagrangians in dimensions
one, two, three and four. The supersymmetric interaction potential covariantly
deforms the bosonic one, producing in particular suitable super-symmetric
polynomials generated by the Berezinian. As an additional application of our
formalism we construct supersymmetric multi-Maxwell theories in dimensions
three and four.Comment: 37 pages, Latex2e, no figure
Correlators at large c without information loss

We study a simple class of correlators with two heavy and two light operators
both in the D1D5 CFT and in the dual AdS$_3 \times S^3 \times T^4$ description.
On the CFT side we focus on the free orbifold point and discuss how these
correlators decompose in terms of conformal blocks, showing that they are
determined by protected quantities. On the gravity side, the heavy states are
described by regular, asymptotically AdS$_3 \times S^3 \times T^4$ solutions
and the correlators are obtained by studying the wave equation in these
backgrounds. We find that the CFT and the gravity results agree and that, even
in the large central charge limit, these correlators do not have (Euclidean)
spurious singularities. We suggest that this is indeed a general feature of the
heavy-light correlators in unitary CFTs, which can be relevant for
understanding how information is encoded in black hole microstates.Comment: 32 pages, v2: citations added, typos corrected, v3: typos corrected,
  submitted to JHE
A Holographic Model for Quantum Critical Responses

We analyze the dynamical response functions of strongly interacting quantum
critical states described by conformal field theories (CFTs). We construct a
self-consistent holographic model that incorporates the relevant scalar
operator driving the quantum critical phase transition. Focusing on the finite
temperature dynamical conductivity $\sigma(\omega,T)$, we study its dependence
on our model parameters, notably the scaling dimension of the relevant
operator. It is found that the conductivity is well-approximated by a simple
ansatz proposed by Katz et al [1] for a wide range of parameters. We further
dissect the conductivity at large frequencies $\omega >> T$ using the operator
product expansion, and show how it reveals the spectrum of our model CFT. Our
results provide a physically-constrained framework to study the analytic
continuation of quantum Monte Carlo data, as we illustrate using the O(2)
Wilson-Fisher CFT. Finally, we comment on the variation of the conductivity as
we tune away from the quantum critical point, setting the stage for a
comprehensive analysis of the phase diagram near the transition.Comment: 25+18 pages; 8+2 figures; 1 table. v3: published versio
Perturbative Construction of Stationary Randall-Sundrum II Black Holes
  on a 5-Brane

We numerically construct large Randall-Sundrum II brane black holes in 4 and
5 dimensions from associated AdS/CFT spacetimes. Our solutions are leading
order perturbations of a representative of the boundary conformal structure of
the AdS spacetime sourced by the dual CFT stress tensor. The 4-dimensional
solutions are static perturbations of the Euclidean Schwarzschild metric, while
the 5-dimensional solutions are perturbations of the Myers-Perry metric with
equal angular momenta. We compare the former with previous numerical results
for Randall-Sundrum bulk black holes and find good agreement down to a horizon
radius of about rH ~30l. The latter are the first numerical results pertaining
to rotating Randall-Sundrum black holes. They have the same entropy, but a
larger horizon area than Myers-Perry black holes of the same mass and angular
momentum.Comment: 25 pages, 14 figures, v2: references adde
The gravity duals of modular Hamiltonians

In this work, we investigate modular Hamiltonians defined with respect to arbitrary spatial regions in quantum field theory states which have semi-classical gravity duals. We find prescriptions in the gravity dual for calculating the action of the modular Hamiltonian on its defining state, including its dual metric, and also on small excitations around the state. Curiously, use of the covariant holographic entanglement entropy formula leads us to the conclusion that the modular Hamiltonian, which in the quantum field theory acts only in the causal completion of the region, does not commute with bulk operators whose entire gauge-invariant description is space-like to the causal completion of the region.United States. Dept. of Energy (Contract DE-SC00012567
Higgs pair productions in the CP-violating two-Higgs-doublet model

In this work, we study the SM-like Higgs pair productions in the framework of
the general CP-violating two-Higgs-doublet model. Several constraints are
imposed to the model sequentially, including the SM-like Higgs boson signal
fits, the precise measurements of the electric dipole moments, the perturbative
unitarity and stability bounds to the Higgs potential, and the most recent LHC
searches for the heavy Higgs bosons. We show how are the CP-violating mixing
angles related to the Higgs cubic self couplings in this setup. Afterwards, we
estimate the cross sections of the future LHC/SppC searches for the Higgs pair
productions, as well as other possible decay modes for the heavy Higgs bosons.Comment: JHEP style, 29 pages, 9 figures, matches the published versio