pinecone/core-2020-05-10-deduplication huggingface dataset:
Effective Theory of a Dynamically Broken Electroweak Standard Model at
  NLO

We consider the Standard Model as an effective theory at the weak scale $v$
of a generic new strong interaction that dynamically breaks electroweak
symmetry at the energy scale $\Lambda\sim $ (few) TeV. Assuming only the
minimal field content with the Standard Model fermions and gauge bosons, but
without a light Higgs particle, we construct the complete Lagrangian through
next-to-leading order, that is, including terms of order $v^2/\Lambda^2$. The
systematics behind this expansion is clarified. Although similar to chiral
perturbation theory, it is not governed by the dimension of operators alone,
but depends in an essential way on the loop expansion. Power-counting formulas
are derived that indicate the classes of operators required at the
next-to-leading order. The complete set of operators at leading and
next-to-leading order is then listed, based on the restrictions implied by the
Standard-Model gauge symmetries. We recover the well-known operators discussed
in the literature in connection with the electroweak chiral Lagrangian and in
similar contexts, but we collect a complete and systematic list of all terms
through order $v^2/\Lambda^2$. This includes some operators not discussed in
explicit terms before. We also show that a few of the previously considered
operators can be eliminated via the equations of motion. As another important
result we confirm the known list of dimension-6 operators in the Standard Model
with an elementary Higgs doublet, essentially as a special case of our
scenario.Comment: 35 pages, 1 figure; references adde
Infrared fixed point in quantum Einstein gravity

We performed the renormalization group analysis of the quantum Einstein
gravity in the deep infrared regime for different types of extensions of the
model. It is shown that an attractive infrared point exists in the broken
symmetric phase of the model. It is also shown that due to the Gaussian fixed
point the IR critical exponent $\nu$ of the correlation length is 1/2. However,
there exists a certain extension of the model which gives finite correlation
length in the broken symmetric phase. It typically appears in case of models
possessing a first order phase transitions as is demonstrated on the example of
the scalar field theory with a Coleman-Weinberg potential.Comment: 9 pages, 7 figures, final version, to appear in JHE
Higgs and Dark Matter Hints of an Oasis in the Desert

Recent LHC results suggest a standard model (SM)-like Higgs boson in the
vicinity of 125 GeV with no clear indications yet of physics beyond the SM. At
the same time, the SM is incomplete, since additional dynamics are required to
accommodate cosmological dark matter (DM). In this paper we show that
interactions between weak scale DM and the Higgs which are strong enough to
yield a thermal relic abundance consistent with observation can easily
destabilize the electroweak vacuum or drive the theory into a non-perturbative
regime at a low scale. As a consequence, new physics--beyond the DM
itself--must enter at a cutoff well below the Planck scale and in some cases as
low as O(10 - 1000 TeV), a range relevant to indirect probes of flavor and CP
violation. In addition, this cutoff is correlated with the DM mass and
scattering cross-section in a parameter space which will be probed
experimentally in the near term. Specifically, we consider the SM plus
additional spin 0 or 1/2 states with singlet, triplet, or doublet electroweak
quantum numbers and quartic or Yukawa couplings to the Higgs boson. We derive
explicit expressions for the full two-loop RGEs and one-loop threshold
corrections for these theories.Comment: 29 pages, 13 figure
Stop the Top Background of the Stop Search

The main background for the supersymmetric stop direct production search
comes from Standard Model ttbar events. For the single-lepton search channel,
we introduce a few kinematic variables to further suppress this background by
focusing on its dileptonic and semileptonic topologies. All are defined to have
end points in the background, but not signal distributions. They can
substantially improve the stop signal significance and mass reach when combined
with traditional kinematic variables such as the total missing transverse
energy. Among them, our variable M^W_T2 has the best overall performance
because it uses all available kinematic information, including the on-shell
mass of both W's. We see 20%-30% improvement on the discovery significance and
estimate that the 8 TeV LHC run with 20 fb-1 of data would be able to reach an
exclusion limit of 650-700 GeV for direct stop production, as long as the stop
decays dominantly to the top quark and a light stable neutralino. Most of the
mass range required for the supersymmetric solution of the naturalness problem
in the standard scenario can be covered.Comment: 16 pages, 5 figure
Constraining BSM Physics at the LHC: Four top final states with NLO
  accuracy in perturbative QCD

Many theories, from Supersymmetry to models of Strong Electroweak Symmetry
Breaking, look at the production of four top quarks as an interesting channel
to evidentiate signals of new physics beyond the Standard Model. The production
of four-top final states requires large partonic energies, above the 4mt
threshold, that are available at the CERN Large Hadron Collider and will become
more and more accessible with increasing energy and luminosity of the proton
beams. A good theoretical control on the Standard Model background is a
fundamental prerequisite for a correct interpretation of the possible signals
of new physics that may arise in this channel. In this paper we report on the
calculation of the next-to-leading order QCD corrections to the Standard Model
process pp -> tttt + X. As it is customary for such studies, we present results
for both integrated and differential cross sections. A judicious choice of a
dynamical scale allows us to obtain nearly constant K-factors in most
distributions.Comment: 21 pages, 14 figures, 3 table
Underlying Event measurements in pp collisions at sqrt(s) = 0.9 and 7 TeV with the ALICE experiment at the LHC

We present measurements of Underlying Event observables in pp collisions at sqrt(s)=0.9 and 7 TeV. The analysis is performed as a function of the highest charged-particle transverse momentum pT, LT in the event. Different regions are defined with respect to the azimuthal direction of the leading (highest transverse momentum) track: Toward, Transverse and Away. The Toward and Away regions collect the fragmentation products of the hardest partonic interaction. The Transverse region is expected to be most sensitive to the Underlying Event activity. The study is performed with charged particles above three different pT thresholds: 0.15, 0.5 and 1.0 GeV/c. In the Transverse region we observe an increase in the multiplicity of a factor 2–3 between the lower and higher collision energies, depending on the track pT threshold considered. Data are compared to Pythia 6.4, Pythia 8.1 and Phojet. On average, all models considered underestimate the multiplicity and summed pT in the Transverse region by about 10–30%
Invisible Higgs and Dark Matter

We investigate the possibility that a massive weakly interacting fermion
simultaneously provides for a dominant component of the dark matter relic
density and an invisible decay width of the Higgs boson at the LHC. As a
concrete model realizing such dynamics we consider the minimal walking
technicolor, although our results apply more generally. Taking into account the
constraints from the electroweak precision measurements and current direct
searches for dark matter particles, we find that such scenario is heavily
constrained, and large portions of the parameter space are excluded.Comment: arXiv admin note: text overlap with arXiv:0912.229
The Higgs as a Probe of Supersymmetric Extra Sectors

We present a general method for calculating the leading contributions to h ->
gg and h -> gamma gamma in models where the Higgs weakly mixes with a nearly
supersymmetric extra sector. Such mixing terms can play an important role in
raising the Higgs mass relative to the value expected in the MSSM. Our method
applies even when the extra sector is strongly coupled, and moreover does not
require a microscopic Lagrangian description. Using constraints from holomorphy
we fix the leading parametric form of the contributions to these Higgs
processes, including the Higgs mixing angle dependence, up to an overall
coefficient. Moreover, when the Higgs is the sole source of mass for a
superconformal sector, we show that even this coefficient is often calculable.
For appropriate mixing angles, the contribution of the extra states to h -> gg
and h -> gamma gamma can vanish. We also discuss how current experimental
limits already lead to non-trivial constraints on such models. Finally, we
provide examples of extra sectors which satisfy the requirements necessary to
use the holomorphic approximation.Comment: v4: 34 pages, 2 figures, typo corrected and clarification adde
Searching for Direct Stop Production in Hadronic Top Data at the LHC

We argue that evidence can be uncovered for stops between 300-600 GeV in 5
fb^-1 of 7 TeV proton-proton collisions if they decay into top quarks and light
neutral particles. We also show that with 20 fb^-1 of 8 TeV running, discovery
or exclusion can be made in large regions of parameter space. Events with a
fully hadronic top/anti-top pair and a pair of invisible decay products can be
identified with the top-tagging of a fat jet, a single b-tag, a missing
transverse energy cut, as well as other kinematic cuts to reduce backgrounds
with real top quarks in them. Such cuts obliterate the background suggesting
discovery can be made with a handful of events.Comment: 8 pages, 7 figure
Black Branes in a Box: Hydrodynamics, Stability, and Criticality

We study the effective hydrodynamics of neutral black branes enclosed in a
finite cylindrical cavity with Dirichlet boundary conditions. We focus on how
the Gregory-Laflamme instability changes as we vary the cavity radius R. Fixing
the metric at the cavity wall increases the rigidity of the black brane by
hindering gradients of the redshift on the wall. In the effective fluid, this
is reflected in the growth of the squared speed of sound. As a consequence,
when the cavity is smaller than a critical radius the black brane becomes
dynamically stable. The correlation with the change in thermodynamic stability
is transparent in our approach. We compute the bulk and shear viscosities of
the black brane and find that they do not run with R. We find mean-field theory
critical exponents near the critical point.Comment: 23 pages, 3 figures. v2: added comments on first-order phase
  transitio
Geometry and Observables in Vasiliev's Higher Spin Gravity

We provide global formulations of Vasiliev's four-dimensional minimal bosonic
higher spin gravities by identifying structure groups, soldering one-forms and
classical observables. In the unbroken phase, we examine how decorated Wilson
loops collapse to zero-form charges and exploit them to enlarge the Vasiliev
system with new interactions. We propose a metric phase whose characteristic
observables are minimal areas of higher spin metrics and on shell closed
abelian forms of positive even degrees. We show that the four-form is an on
shell deformation of the generalized Hamiltonian action recently proposed by
Boulanger and one of the authors. In the metric phase, we also introduce
tensorial coset coordinates and demonstrate how single derivatives with respect
to coordinates of higher ranks factorize into multiple derivatives with respect
to coordinates of lower ranks.Comment: 32 pages, v2: Introduction revised, clarifying remarks added and a
  few equations corrected; v3: Further clarifying remarks adde
Classical Duals, Legendre Transforms and the Vainshtein Mechanism

We show how to generalize the classical duals found by Gabadadze {\it et al}
to a very large class of self-interacting theories. This enables one to adopt a
perturbative description beyond the scale at which classical perturbation
theory breaks down in the original theory. This is particularly relevant if we
want to test modified gravity scenarios that exhibit Vainshtein screening on
solar system scales. We recognise the duals as being related to the Legendre
transform of the original Lagrangian, and present a practical method for
finding the dual in general; our methods can also be applied to
self-interacting theories with a hierarchy of strong coupling scales, and with
multiple fields. We find the classical dual of the full quintic galileon theory
as an example.Comment: 16 page
Dipole Coupling Effect of Holographic Fermion in the Background of
  Charged Gauss-Bonnet AdS Black Hole

We investigate the holographic fermions in the charged Gauss-Bonnet $AdS_{d}$
black hole background with the dipole coupling between fermion and gauge field
in the bulk. We show that in addition to the strength of the dipole coupling,
the spacetime dimension and the higher curvature correction in the gravity
background also influence the onset of the Fermi gap and the gap distance. We
find that the higher curvature effect modifies the fermion spectral density and
influences the value of the Fermi momentum for the appearance of the Fermi
surface. There are richer physics in the boundary fermion system due to the
modification in the bulk gravity.Comment: 16 pages, accepted for publication in JHE
Fluid/Gravity Correspondence, Local Wald Entropy Current and
  Gravitational Anomaly

We propose, in the framework of the fluid/gravity correspondence, a
definition for a local horizon entropy current for higher-curvature
gravitational theories. The current is well-defined to first order in fluid
gradients for general gravity actions with an algebraic dependence on the
Riemann tensor. As a detailed example, we consider five-dimensional
Einstein-Maxwell theory with a mixed gauge-gravitational Chern-Simons term. In
this theory, we construct the proposed entropy current on a charged black-brane
background, and show that it has a non-negative divergence. Moreover, a
complete correspondence between the charged black-brane horizon's dynamics and
the hydrodynamics of an anomalous four-dimensional field theory is established.
Our proposed entropy current is then found to coincide with the entropy current
of the anomalous field theory fluid.Comment: 44 page
Study of Anisotropic Black Branes in Asymptotically anti-de Sitter

We investigate the four dimensional gravitational theories which admit
homogeneous but anisotropic black brane solutions in asymptotically AdS
space-time. The gravitational theories we consider are 1)
Einstein-Maxwell-dilaton theory, and 2) Einstein-Maxwell-dilaton-axion theory
with SL(2,R) symmetry. We obtain the solutions both analytically and
numerically. Analytical solutions are obtained by perturbation from the
isotropic solutions. Our solutions approach singular behavior at the horizon in
the extremal limit but in non-extremal case, they are smooth everywhere. We
also discuss how the third law of thermodynamics holds in our set-up.Comment: 31 pages, 12 figure
HOMFLY and superpolynomials for figure eight knot in all symmetric and
  antisymmetric representations

Explicit answer is given for the HOMFLY polynomial of the figure eight knot
$4_1$ in arbitrary symmetric representation R=[p]. It generalizes the old
answers for p=1 and 2 and the recently derived results for p=3,4, which are
fully consistent with the Ooguri-Vafa conjecture. The answer can be considered
as a quantization of the \sigma_R = \sigma_{[1]}^{|R|} identity for the
"special" polynomials (they define the leading asymptotics of HOMFLY at q=1),
and arises in a form, convenient for comparison with the representation of the
Jones polynomials as sums of dilogarithm ratios. In particular, we construct a
difference equation ("non-commutative A-polynomial") in the representation
variable p. Simple symmetry transformation provides also a formula for
arbitrary antisymmetric (fundamental) representation R=[1^p], which also passes
some obvious checks. Also straightforward is a deformation from HOMFLY to
superpolynomials. Further generalizations seem possible to arbitrary Young
diagrams R, but these expressions are harder to test because of the lack of
alternative results, even partial.Comment: 14 page
Measurement of the isospin asymmetry in B→K(∗)μ+μ− decays

The isospin asymmetries of B → K (∗) μ + μ − decays and the partial branching fractions of B 0 → K 0 μ + μ − and B + → K ∗+ μ + μ − are measured as a function of the di-muon mass squared q 2 using an integrated luminosity of 1.0 fb−1 collected with the LHCb detector. The B → Kμ + μ − isospin asymmetry integrated over q 2 is negative, deviating from zero with over 4 σ significance. The B → K ∗ μ + μ − decay measurements are consistent with the Standard Model prediction of negligible isospin asymmetry. The observation of the decay B 0 → K S μ + μ − is reported with 5.7 σ significance. Assuming that the branching fraction of B 0 → K 0 μ + μ − is twice that of B 0 → K S μ + μ −, the branching fractions of B 0 → K 0 μ + μ − and B → K ∗+ μ + μ − are found to be (0.31−0.06) × 10−6 and (1.16 ± 0.19) × 10−6, respectively
Minimal lepton flavor violating realizations of minimal seesaw models

We study the implications of the global U(1)R symmetry present in minimal
lepton flavor violating implementations of the seesaw mechanism for neutrino
masses. In the context of minimal type I seesaw scenarios with a slightly
broken U(1)R, we show that, depending on the R-charge assignments, two classes
of generic models can be identified. Models where the right-handed neutrino
masses and the lepton number breaking scale are decoupled, and models where the
parameters that slightly break the U(1)R induce a suppression in the light
neutrino mass matrix. We show that within the first class of models,
contributions of right-handed neutrinos to charged lepton flavor violating
processes are severely suppressed. Within the second class of models we study
the charged lepton flavor violating phenomenology in detail, focusing on mu to
e gamma, mu to 3e and mu to e conversion in nuclei. We show that sizable
contributions to these processes are naturally obtained for right-handed
neutrino masses at the TeV scale. We then discuss the interplay with the
effects of the right-handed neutrino interactions on primordial B - L
asymmetries, finding that sizable right-handed neutrino contributions to
charged lepton flavor violating processes are incompatible with the requirement
of generating (or even preserving preexisting) B - L asymmetries consistent
with the observed baryon asymmetry of the Universe.Comment: 21 pages, 4 figures; version 2: Discussion on possible generic models
  extended, typos corrected, references added. Version matches publication in
  JHE
Interpreting LHC Higgs Results from Natural New Physics Perspective

We analyze the 2011 LHC Higgs data in the context of simplified new physics
models addressing the naturalness problem. These models are expected to contain
new particles with sizable couplings to the Higgs boson, which can easily
modify the Higgs production cross sections and branching fractions. We focus on
searches in the Higgs to 4 leptons and Higgs to diphoton channels, in the
latter case including the vector boson fusion production mode. Combining the
available ATLAS and CMS data in these channels, we derive constraints on an
effective low-energy theory of the Higgs boson. We then map several simplified
scenarios to the effective theory, capturing numerous natural new physics
models such as supersymmetry and Little Higgs, and extract the constraints on
the corresponding parameter space. We show that simple models where one
fermionic or one scalar partner is responsible for stabilizing the Higgs
potential are already constrained in a non-trivial way by LHC Higgs data.Comment: 26 pages, 9 figures; v2: small changes in the analysis, figures and
  typos fixed, references added; v3: plots and discussion update
A non-renormalization theorem for chiral primary 3-point functions

In this note we prove a non-renormalization theorem for the 3-point functions
of 1/2 BPS primaries in the four-dimensional N = 4 SYM and chiral primaries in
two dimensional N =(4,4) SCFTs. Our proof is rather elementary: it is based on
Ward identities and the structure of the short multiplets of the superconformal
algebra and it does not rely on superspace techniques. We also discuss some
possible generalizations to less supersymmetric multiplets.Comment: 32 pages, added references, corrected typo
On The Inflaton Potential From Antibranes in Warped Throats

We compute the force between a stack of smeared antibranes at the bottom of a
warped throat and a stack of smeared branes at some distance up the throat,
both for anti-D3 branes and for anti-M2 branes. We perform this calculation in
two ways: first, by treating the antibranes as probes in the background sourced
by the branes and second, by treating the branes as probes in the candidate
background sourced by the antibranes. These two very different calculations
yield exactly the same expression for the force, for all values of the
brane-antibrane separation. This indicates that the force between a brane and
an antibrane is not screened in backgrounds where there is positive charge
dissolved in flux, and gives a way to precisely compute the inflaton potential
in certain string cosmology scenarios.Comment: 9 page
Sommerfeld Enhancement from Multiple Mediators

We study the Sommerfeld enhancement experienced by a scattering object that
couples to a tower of mediators. This can occur in, e.g., models of secluded
dark matter when the mediator scale is generated naturally by hidden-sector
confinement. Specializing to the case of a confining CFT, we show that
off-resonant values of the enhancement can be increased by ~ 20% for cases of
interest when (i) the (strongly-coupled) CFT admits a weakly-coupled dual
description and (ii) the conformal symmetry holds up to the Planck scale.
Larger enhancements are possible for lower UV scales due to an increase in the
coupling strength of the tower.Comment: 17p, 2 figures; v2 JHEP version (inconsequential typo fixed,
  references added
From Navier-Stokes to Einstein

We show by explicit construction that for every solution of the incompressible Navier-Stokes equation in \(p + 1\) dimensions, there is a uniquely associated “dual” solution of the vacuum Einstein equations in \(p + 2\) dimensions.  The dual geometry has an intrinsically flat timelike boundary segment \(\sum_c\) whose extrinsic curvature is given by the stress tensor of the Navier-Stokes fluid. We consider a “near-horizon” limit in which \(\sum_c\) becomes highly accelerated.  The near-horizon expansion in gravity is shown to be mathematically equivalent to the hydrodynamic expansion in fluid dynamics, and the Einstein equation reduces to the incompressible Navier-Stokes equation.  For \(p = 2\), we show that the full dual geometry is algebraically special Petrov type II.  The construction is a mathematically precise realization of suggestions of a holographic duality relating fluids and horizons which began with the membrane paradigm in the 70’s and resurfaced recently in studies of the AdS/CFT correspondence.Physic