pinecone/core-2020-05-10-deduplication huggingface dataset:
Exceptional conformal anomaly of null polygonal Wilson loops

We analyse the breaking of conformal invariance for null polygonal Wilson
loops in ${\cal N}=4$ SYM beyond that induced by the UV divergences due to the
cusps. It only shows up in exceptional configurations, where the polygon
intersects the critical light cone of an inversion or a special conformal
transformation. In comparison with the related study for the Euclidean version
by Drukker and Gross, we find different leading terms both for weak as well as
for strong coupling. Hence the conformal anomaly due to intersections of a null
polygon with a critical light cone defines a new universal function of the
coupling constant.Comment: 17 pages, 7 figures, sign error in (20) corrected, comment on smooth
  space-like contours added, version to appear in JHE
On the amplitudes in N=(1,1) D=6 SYM

We consider the on-shell amplitudes in N=(1,1) SYM in D=6 dimensions within
the spinor helicity and on-shell superspace formalism. This leads to an
effective and straightforward technique reducing the calculation to a set of
scalar master integrals. As an example, the simplest four point amplitude is
calculated in one and two loops in the planar limit. All answers are UV and IR
finite and expressed in terms of logs and Polylogs of transcendentality level 2
at one loop, and 4 and 3 at two loops. The all loop asymptotical limit at high
energy is obtained which exhibits the Regge type behaviour. The intercept is
calculated in the planar limit and is equal to alpha(t)=1+\sqrt{g_{YM}^2
N_c|t|/32pi^3}.Comment: Latex, 24 pages, 4 figures, v2 typos corrected, references adde
Higgs windows to new physics through d = 6 operators: Constraints and
  one-loop anomalous dimensions

The leading contributions from heavy new physics to Higgs processes can be
captured in a model-independent way by dimension-six operators in an effective
Lagrangian approach. We present a complete analysis of how these contributions
affect Higgs couplings. Under certain well-motivated assumptions, we find that
8 CP-even plus 3 CP-odd Wilson coefficients parametrize the main impact in
Higgs physics, as all other coefficients are constrained by non-Higgs SM
measurements. We calculate the most relevant anomalous dimensions for these
Wilson coefficients, which describe operator mixing from the heavy scale down
to the electroweak scale. This allows us to find the leading-log corrections to
the predictions for the Higgs couplings in specific models, such as the MSSM or
composite Higgs, which we find to be significant in certain cases.Comment: 45 pages. Some minor typos fixed. Matches published versio
JIMWLK evolution for multi-particle production in Langevin form

Within the effective theory for the Color Glass Condensate, we study
multi-particle production with rapidity correlations in proton-nucleus
collisions at high energy. The high-energy evolution responsible for such
correlations is governed by a generalization of the JIMWLK equation which
describes the simultaneous evolution of the (strong) nuclear color fields in
the direct amplitude and the complex conjugate amplitude. This functional
equation can be used to derive ordinary evolution equations for the
cross-sections for particle production (a generalization of the Balitsky
hierarchy). However, the ensuing equations appear to be too complicated to be
useful in practice, including in the limit where the number of colors is large.
To circumvent this problem, we propose an alternative formulation of the
high-energy evolution as a Langevin process, which is better suited for
numerical implementations. This process is directly oriented towards the
calculation of the cross-sections, so its detailed structure depends upon the
nature of the final state. We present the stochastic equations appropriate for
two gluon production, and also for three gluon production, with generic
rapidity differences.Comment: 28 pages, 5 figure
The discontinuities of conformal transitions and mass spectra of V-QCD

Zero temperature spectra of mesons and glueballs are analyzed in a class of
holographic bottom-up models for QCD in the Veneziano limit, N_c -> infinity,
N_f -> infinity, with x = N_f/N_c fixed (V-QCD). The backreaction of flavor on
color is fully included. It is found that spectra are discrete and gapped
(modulo the pions) in the QCD regime, for x below the critical value x_c where
the conformal transition takes place. The masses uniformly converge to zero in
the walking region x -> x_c^- due to Miransky scaling. All the ratios of masses
asymptote to non-zero constants as x -> x_c^- and therefore there is no
"dilaton" in the spectrum. The S-parameter is computed and found to be of O(1)
in units of N_f N_c in the walking regime, while it is always an increasing
function of x. This indicates the presence of a subtle discontinuity of
correlation functions across the conformal transition at x = x_c.Comment: 45 pages plus appendices, 13 figure
Abelian symmetries of the N-Higgs-doublet model with Yukawa interactions

We investigate finite abelian groups which can represent symmetries of the
N-Higgs-doublet models with quarks. We build a general formalism based on the
powerful method of the Smith normal form and obtain an analytic upper bound on
the order of abelian symmetry groups for any N. We investigate in detail the
case N=2 and rederive known results in a more compact and intuitive fashion. We
also study the NHDM with the maximal finite abelian symmetry for all small N
cases up to N=5, and show that in each case all Yukawa textures compatible with
such symmetry originate from a unique basic structure. This work opens the way
to a systematic exploration of phenomenology of the NHDM with a desired
symmetry, and illustrates the power of the Smith normal form technique.Comment: 31 pages, no figures; v2: extra references, matches published versio
Linear Sigma Models With Strongly Coupled Phases -- One Parameter Models

We systematically construct a class of two-dimensional $(2,2)$ supersymmetric
gauged linear sigma models with phases in which a continuous subgroup of the
gauge group is totally unbroken. We study some of their properties by employing
a recently developed technique. The focus of the present work is on models with
one K\"ahler parameter. The models include those corresponding to Calabi-Yau
threefolds, extending three examples found earlier by a few more, as well as
Calabi-Yau manifolds of other dimensions and non-Calabi-Yau manifolds. The
construction leads to predictions of equivalences of D-brane categories,
systematically extending earlier examples. There is another type of surprise.
Two distinct superconformal field theories corresponding to Calabi-Yau
threefolds with different Hodge numbers, $h^{2,1}=23$ versus $h^{2,1}=59$, have
exactly the same quantum K\"ahler moduli space. The strong-weak duality plays a
crucial r\^ole in confirming this, and also is useful in the actual computation
of the metric on the moduli space.Comment: 84 pages; typos and simple errors corrected, computation of elliptic
  genus and topology added in appendi
Self-energies on deformed spacetimes

We study one-loop photon (Pi) and neutrino (Sigma) self-energies in a U(1)
covariant gauge-theory on d-dimensional noncommutative spaces determined by a
antisymmetric-constant tensor theta^{mu nu}. For the general fermion-photon
(S_f) and photon self-interaction (S_g) the closed form results reveal
self-energies besetting with all kind of pathological terms: the UV divergence,
the quadratic UV/IR mixing terms as well as a logarithmic IR divergent term of
the type ln(mu^2(theta p)^2). In addition, the photon-loop produces new tensor
structures satisfying transversality condition by themselves. We show that the
photon self-energy in four-dimensional Euclidean spacetime can be reduced to
two finite terms by imposing a specific full rank of theta^{mu nu} and setting
deformation parameters (kappa_f,kappa_g)=(0,3). In this case the neutrino
two-point function vanishes. Thus for a specific point (0,3) in the
parameter-space (kappa_f,kappa_g), a covariant theta-exact approach is able to
produce a divergence-free result for one-loop quantum corrections, having also
well-defined both the commutative limit as well as the pointlike limit of an
extended object. While in two-dimensional space the photon self-energy is
finite for arbitrary (kappa_f,kappa_g) combinations, the neutrino self-energy
still contains an superficial IR divergence.Comment: D-dimensional photon-loop contribution added to the photon
  self-energy; version to appear in JHEP, 29 pages, 3 figures, 1 tabl
Exact results for the low energy AdS(4)XCP(3) string theory

We derive the Thermodynamic Bethe Ansatz equations for the relativistic sigma
model describing the AdS(4)XCP(3) string II A theory at strong coupling (i.e.
in the Alday-Maldacena decoupling limit). The corresponding Y-system involves
an infinite number of Y functions and is of a new type, although it shares a
peculiar feature with the Y-system for AdS(4)XCP(3). A truncation of the
equations at level p and a further generalisation to generic rank N allow us an
alternative description of the theory as the N=4, p= \infty representative in
an infinite family of models corresponding to the conformal cosets CP(N-1)_p X
U(1), perturbed by a relevant composite field \phi(N,p) =\phi_[CP(N-1)_p] X
\phi[U(1)] that couples the two independent conformal field theories. The
calculation of the ultraviolet central charge confirms the conjecture by Basso
and Rej and the conformal dimension of the perturbing operator, at every N and
p, is obtained using the Y-system periodicity. The conformal dimension of
\phi[CP(N-1)_p] matches that of the field identified by Fendley while
discussing integrability issues for the purely bosonic CP(N-1) sigma model.Comment: Latex fil
Quantum corrections to holographic entanglement entropy

We consider entanglement entropy in quantum field theories with a gravity
dual. In the gravity description, the leading order contribution comes from the
area of a minimal surface, as proposed by Ryu-Takayanagi. Here we describe the
one loop correction to this formula. The minimal surface divides the bulk into
two regions. The bulk loop correction is essentially given by the bulk
entanglement entropy between these two bulk regions. We perform some simple
checks of this proposal.Comment: 21 pages, 10 figures. V2: reference adde
Examples of N=2 to N=1 supersymmetry breaking

In this paper we consider gauged N=2 supergravities which arise in the
low-energy limit of type II string theories and study examples which exhibit
spontaneous partial supersymmetry breaking. For the quantum STU model we derive
the scalar field space and the scalar potential of the N=1 supersymmetric
low-energy effective action. We also study the properties of the Minkowskian
N=1 supersymmetricground states for a broader class of supergravities including
the quantum STU model.Comment: 22 pages, added references, version to appear in JHE
Initial state propagators

It is possible to define a general initial state for a quantum field by
introducing a contribution to the action defined at an initial-time boundary.
The propagator for this theory is composed of two parts, one associated with
the free propagation of fields and another produced by the operators of this
initial action. The derivation of this propagator is shown for the case of a
translationally and rotationally invariant initial state. In addition to being
able to treat more general states, these techniques can also be applied to
effective field theories that start from an initial time. The eigenstates of a
theory with interacting heavy and light fields are different from the
eigenstates of the theory in the limit where the interactions vanish.
Therefore, a product of states of the noninteracting heavy and light theories
will usually contain excitations of the heavier state once the interactions are
included. Such excitations appear as nonlocal effects in the effective theory,
which are suppressed by powers of the mass of the heavy field. By appropriately
choosing the initial action, these excitations can be excised from the state
leaving just effects that would be produced by a local action of the lighter
fields.Comment: 16 pages, no figure
Holographic Vorticity in the Fluid/Gravity Correspondence

The vorticity statistics characterises both the direct and the inverse
turbulent cascades of two-dimensional fluid flows. The fluid/gravity
correspondence relates fluid flows to black brane dynamics. We construct the
holographic vorticity for relativistic and non-relativistic fluids in terms of
the gravitational black brane data, and relate it to the horizon vorticity
expressed as a Weyl scalar. We discuss the statistical scaling structure of the
horizon geometry.Comment: 13 pages, v2: fixed typos, minor improvement
Single soft gluon emission at two loops

We study the single soft-gluon current at two loops with two energetic
partons in massless perturbative QCD, which describes, for example, the soft
limit of the two-loop amplitude for $gg\to Hg$. The results are presented as
Laurent expansions in $\epsilon$ in $D=4-2\epsilon$ spacetime dimension. We
calculate the expansion to order $\epsilon^2$ analytically, which is a
necessary ingredient for Higgs production at hadron colliders at
next-to-next-to-next-to-leading order in the soft-virtual approximation. We
also give two-loop results of the single soft-gluon current in ${\cal N}=4$
Super-Yang-Mills theory, and find that it has uniform transcendentality. By
iteration relation of splitting amplitudes, our calculations can determine the
three-loop single soft-gluon current to order $\epsilon^0$ in ${\cal N}=4$
Super-Yang-Mills theory in the limit of large $N_c$.Comment: typos corrected; journal versio
Yangian Symmetry of smooth Wilson Loops in N=4 super Yang-Mills Theory

We show that appropriately supersymmetrized smooth Maldacena-Wilson loop
operators in N=4 super Yang-Mills theory are invariant under a Yangian symmetry
Y[psu(2,2|4)] built upon the manifest superconformal symmetry algebra of the
theory. The existence of this hidden symmetry is demonstrated at the one-loop
order in the weak coupling limit as well as at leading order in the strong
coupling limit employing the classical integrability of the dual AdS_5 x S^5
string description. The hidden symmetry generators consist of a canonical
non-local second order variational derivative piece acting on the superpath,
along with a novel local path dependent contribution. We match the functional
form of these Yangian symmetry generators at weak and strong coupling and find
evidence for an interpolating function. Our findings represent the smooth
counterpart to the Yangian invariance of scattering superamplitudes dual to
light-like polygonal super Wilson loops in the N=4 super Yang-Mills theory.Comment: 36 pages, 1 figure. v2: Typos corrected, version to be published in
  JHE
Gluon saturation scale from the KGBJS equation

The CCFM equation and its extended form with a quadratic term (KGBJS
equation) are solved with fixed and running coupling constant. The solution of
the KGBJS equation is compared to gluon densities resulting from the CCFM and
BK equations. As the saturation scale $Q_s$ now becomes available as a function
of the hard scale $p$ we observe that low values of $p$ impede its growth with
$\frac 1 x$. Also, at values much larger than partons transversal momentum the
saturation effects become independent on the hard scale what we call liberation
of saturation scale. We also introduce the hard-scale-related saturation scale
$P_s$ and investigate its energy dependence. We observe that the new scale as a
function of $x$ decreases starting from the value of transversal momentum of
gluon
Extra U(1), effective operators, anomalies and dark matter

A general analysis is performed on the dimension-six operators mixing an
almost hidden Z' to the Standard Model (SM), when the Z' communicates with the
SM via heavy mediators. These are fermions charged under both Z' and the SM,
while all SM fermions are neutral under Z'. We classify the operators as a
function of the gauge anomalies behaviour of mediators and explicitly compute
the dimension-six operators coupling Z' to gluons, generated at one-loop by
chiral but anomaly-free, sets of fermion mediators. We prove that only one
operator contribute to the couplings between Z' charged matter and on-shell
gluons. We then make a complete phenomenological analysis of the scenario where
the lightest fermion charged under Z' is the dark matter candidate. Combining
results from WMAP/PLANCK data, mono-jet searches at LHC, and direct/indirect
dark matter detections restrict considerably the allowed parameter space.Comment: 40 pages, 11 figure
Spacetime emergence via holographic RG flow from incompressible
  Navier-Stokes at the horizon

We show that holographic RG flow can be defined precisely such that it
corresponds to emergence of spacetime. We consider the case of pure Einstein's
gravity with a negative cosmological constant in the dual hydrodynamic regime.
The holographic RG flow is a system of first order differential equations for
radial evolution of the energy-momentum tensor and the variables which
parametrize it's phenomenological form on hypersurfaces in a foliation. The RG
flow can be constructed without explicit knowledge of the bulk metric provided
the hypersurface foliation is of a special kind. The bulk metric can be
reconstructed once the RG flow equations are solved. We show that the full
spacetime can be determined from the RG flow by requiring that the horizon
fluid is a fixed point in a certain scaling limit leading to the
non-relativistic incompressible Navier-Stokes dynamics. This restricts the
near-horizon forms of all transport coefficients, which are thus determined
independently of their asymptotic values and the RG flow can be solved
uniquely. We are therefore able to recover the known boundary values of almost
all transport coefficients at the first and second orders in the derivative
expansion. We conjecture that the complete characterisation of the general
holographic RG flow, including the choice of counterterms, might be determined
from the hydrodynamic regime.Comment: 61 pages, 2 figures, 5 tables; matches with JHEP versio
Competition between the s-wave and p-wave superconductivity phases in a
  holographic model

We build a holographic superconductor model with a scalar triplet charged
under an SU(2) gauge field in the bulk. In this model, the s-wave and p-wave
condensates can be consistently realized. We find that there are totally four
phases in this model, namely, the normal phase without any condensate, s-wave
phase, p-wave phase and the s+p coexisting phase. By calculating Gibbs free
energy, the s+p coexisting phase turns out to be thermodynamically favored once
it can appear. The phase diagram with the dimension of the scalar operator and
temperature is drawn. The temperature range for the s+p coexisting phase is
very narrow, which shows the competition between the s-wave and p-wave orders
in the superconductor model.Comment: 14 pages, 8 figure
Impacts of non-geometric moduli on effective theory of 5D supergravity

5D supergravity generically has non-geometric moduli other than the radion
that belong to 5D vector multiplets. We summarize the impacts of such moduli on
4D effective theory of 5D supergravity on S^1/Z_2. We mainly discuss the
structure of the effective Kahler potential including the one-loop quantum
corrections. As an illustrative example, we construct a model in which the size
of the extra dimension is stabilized at an exponentially large value compared
to the Planck length, which is similar to the LARGE volume scenario in string
theory.Comment: 25 pages, v2: typos corrected, v3: typos correcte
First observation of the decay B0s→φK¯∗0

The first observation of the decay B0s→ϕK¯¯¯∗0 is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb−1 of pp collisions at s√=7 TeV, collected with the LHCb detector. A yield of 30 ± 6 B0s→(K+K−)(K−π+) decays is found in the mass windows 1012.5 < M (K + K −) < 1026.5 MeV/c 2 and 746 < M(K − π +) < 1046 MeV/c 2. The signal yield is found to be dominated by B0s→ϕK¯¯¯∗0 decays, and the corresponding branching fraction is measured to be B(B0s→ϕK¯¯¯∗0) = (1.10 ± 0.24 (stat) ± 0.14 (syst) ± 0.08 (f d /f s )) × 10−6, where the uncertainties are statistical, systematic and from the ratio of fragmentation fractions f d /f s which accounts for the different production rate of B 0 and B0s mesons. The significance of B0s→ϕK¯¯¯∗0 signal is 6.1 standard deviations. The fraction of longitudinal polarization in B0s→ϕK¯¯¯∗0 decays is found to be f 0 = 0.51 ± 0.15 (stat) ± 0.07 (syst)
T-Duality in Gauged Linear Sigma-Models with Torsion

(0,2) gauged linear sigma models with torsion, corresponding to principal
torus bundles over warped CY bases, provide a useful framework for getting
exact statements about perturbative dualities in the presence of fluxes. In
this context we first study dualities mapping the torus fiber onto itself,
implying the existence of quantization constraints on the torus moduli for
consistency. Second, we investigate dualities mixing the principal torus bundle
with the gauge bundle, relating the torsional GLSMs to ordinary ones
corresponding to CY compactifications with non-standard embeddings, namely two
classes of models with different target-space topologies.Comment: 27 pages. Version 2 : significant changes in section 4. Version 3 :
  few improvements in the text, published version. Version 4 : few typos
  corrected and clarification
Ensemble fermions for electroweak dynamics and the fermion preheating
  temperature

We refine the implementation of ensemble fermions for the electroweak sector
of the Standard Model, introduced previously. We consider the behavior of
different observables as the size of the ensemble is increased and show that
the dynamics converges for ensemble sizes small enough that simulations of the
entire electroweak sector become numerically tractable. We apply the method to
the computation of the effective preheating temperature during a fast
electroweak transition, relevant for Cold Electroweak Baryogenesis. We find
that this temperature is never below 20 GeV, and this in combination with the
early results convincingly rules out Standard Model CP-violation as the origin
of the baryon asymmetry of the Universe.Comment: 19 pages, 10 figure
Localization on round sphere revisited

We consider supersymmetric gauge theories on round 3-sphere with a certain
background gauge field. The Lagrangians break the usual symmetry because the
background gauge field which we have turned on violates the isometry. In order
to maintain the supersymmetry, we choose unfamiliar charged Killing spinors as
N = 2 SUSY parameters. We perform localization calculous within this setup and
find the double sine function as we expected. We comment on more direct
relationship between theories on round sphere and squashed sphere via Weyl
transformation.Comment: 17 pages. Weyl rescaling and Wilson loop discussions added. reference
  adde
Index theory and dynamical symmetry enhancement near IIB horizons

We show that the number of supersymmetries of IIB black hole horizons is N=2
N_- + 2 index(D_\lambda), where index(D_\lambda) is the index of the Dirac
operator twisted with the line bundle \lambda^{1/2} of IIB scalars, and N_- is
the dimension of the kernel of a horizon Dirac operator which depends on IIB
fluxes. Therefore, all IIB horizons preserve an even number of supersymmetries.
In addition if the horizons have non-trivial fluxes and N_- is nonzero, then
index(D_\lambda) is non-negative, and the horizons admit an sl(2,R) symmetry
subalgebra. This provides evidence that all such horizons have an AdS/CFT dual.
Furthermore if the orbits of sl(2,R) are two-dimensional, the IIB horizons are
warped products AdS_2 X S.Comment: 37 pages, late