pinecone/core-2020-05-10-deduplication huggingface dataset:
On flavour and naturalness of composite Higgs models

We analyse the interplay of the constraints imposed on flavour-symmetric Composite Higgs models by Naturalness considerations and the constraints derived from Flavour Physics and Electroweak Precision Tests. Our analysis is based on the Effective Field Theory which describes the Higgs as a pseudo-Nambu-Goldstone boson and also includes the composite fermionic resonances. Within this approach one is able to identify the directions in the parameter space where the U(3)-symmetric flavour models can pass the current experimental constraints, without conflicting with the light Higgs mass. We also derive the general features of the U(2)-symmetric models required by the experimental bounds, in case of elementary and totally composite t R . An effect in the Z b ¯ b $$ Z\overline{b}b $$ coupling, which can potentially allow for sizable deviations in Z → b ¯ b $$ Z\to \overline{b}b $$ decay parameters without modifying flavour physics observables, is identified. We also present the analysis of the mixed scenario, where the top quark mass is generated due to Partial Compositeness while the light quark masses are Technicolor-like
On the calculation of soft phase space integral

The recent discovery of the Higgs boson at the LHC attracts much attention to
the precise calculation of its production cross section in quantum
chromodynamics. In this work, we discuss the calculation of soft
triple-emission phase space integral, which is an essential ingredient in the
recently calculated soft-virtual corrections to Higgs boson production at
next-to-next-to-next-to-leading order. The main techniques used this
calculation are method of differential equation for Feynman integral, and
integration of harmonic polylogarithms.Comment: 20 pages, 1 figur
Illuminating dark photons with high-energy colliders

High-energy colliders offer a unique sensitivity to dark photons, the mediators of a broken dark U(1) gauge theory that kinetically mixes with the Standard Model (SM) hypercharge. Dark photons can be detected in the exotic decay of the 125 GeV Higgs boson, h → ZZ D →4 ℓ , and in Drell-Yan events, pp → Z D → ℓℓ . If the dark U(1) is broken by a hidden-sector Higgs mechanism, then mixing between the dark and SM Higgs bosons also allows the exotic decay h → Z D Z D → 4 ℓ . We show that the 14 TeV LHC and a 100 TeV proton-proton collider provide powerful probes of both exotic Higgs decay channels. In the case of kinetic mixing alone, direct Drell-Yan production offers the best sensitivity to Z D , and can probe ϵ ≳ 9 × 10 −4 (4 × 10 −4 ) at the HL-LHC (100 TeV pp collider). The exotic Higgs decay h → ZZ D offers slightly weaker sensitivity, but both measurements are necessary to distinguish the kinetically mixed dark photon from other scenarios. If Higgs mixing is also present, then the decay h → Z D Z D can allow sensitivity to the Z D for ϵ ≳ 10 −9 − 10 −6 (10 −10 − 10 −7 ) for the mass range 2 m μ < m Z D < m h / 2 $$ 2{m}_{\mu }<{m_Z}_{{}_D}<{m}_h/2 $$ by searching for displaced dark photon decays. We also compare the Z D sensitivity at pp colliders to the indirect, but model-independent, sensitivity of global fits to electroweak precision observables. We perform a global electroweak fit of the dark photon model, substantially updating previous work in the literature. Electroweak precision measurements at LEP, Tevatron, and the LHC exclude ϵ as low as 3 × 10 −2 . Sensitivity can be improved by up to a factor of ∼ 2 with HL-LHC data, and an additional factor of ∼ 4 with ILC/GigaZ data
A Calabi-Yau database: threefolds constructed from the Kreuzer-Skarke list

Kreuzer and Skarke famously produced the largest known database of Calabi-Yau threefolds by providing a complete construction of all 473,800,776 reflexive polyhedra that exist in four dimensions [1]. These polyhedra describe the singular limits of ambient toric varieties in which Calabi-Yau threefolds can exist as hypersurfaces. In this paper, we review how to extract topological and geometric information about Calabi-Yau threefolds using the toric construction, and we provide, in a companion online database (see http://nuweb1.neu.edu/cydatabase ), a detailed inventory of these quantities which are of interest to physicists. Many of the singular ambient spaces described by the Kreuzer-Skarke list can be smoothed out into multiple distinct toric ambient spaces describing different Calabi-Yau threefolds. We provide a list of the different Calabi-Yau threefolds which can be obtained from each polytope, up to current computational limits. We then give the details of a variety of quantities associated to each of these Calabi-Yau such as Chern classes, intersection numbers, and the Kähler and Mori cones, in addition to the Hodge data. This data forms a useful starting point for a number of physical applications of the Kreuzer-Skarke list
Gauge Invariance and QCD Twist-3 Factorization for Single Spin
  Asymmetries

The collinear factorization at twist-3 for Drell-Yan processes is studied
with the motivation to solve the discrepancy in literature about the single
spin asymmetry in the lepton angular distribution, and to show how QCD gauge
invariance is realized in the hadronic tensor. The obtained result here agrees
with our early result derived with a totally different approach. In addition to
the asymmetry we can construct another two observables to identify the spin
effect. We show that the gauge invariance of different contributions in the
hadronic tensor is made in different ways by summing the effects of gluon
exchanges. More interestingly is that we can show that the virtual correction
to one structure function of the hadronic tensor, hence to some weighted SSA
observables, is completely determined by the quark form factor. This will
simplify the calculation of higher order corrections. The corresponding result
in semi-inclusive DIS is also given for the comparison with Drell-Yan
processes.Comment: Small changes, accepted by JHE
Light-by-light scattering with intact protons at the LHC: from standard model to new physics

We discuss the discovery potential of light-by-light scattering at the Large Hadron Collider (LHC), induced by the Standard Model (SM) and by new exotic charged particles. Our simulation relies on intact proton detection in the planned forward detectors of CMS and ATLAS. The full four-photon amplitudes generated by any electrically charged particles of spins 1/2 and 1, including the SM processes involving loops of leptons, quarks and W bosons are implemented in the Forward Physics Monte Carlo generator. Our method provides model-independent bounds on massive charged particles, only parametrized by the spin, mass and “effective charge” Q eff of the new particle. We find that a new charged vector (fermion) with Q eff = 4 can be discovered up to m = 700 GeV ( m = 370 GeV) with an integrated luminosity of 300 fb −1 at the LHC. We also discuss the sensitivities to neutral particles such as a strongly-interacting heavy dilaton and warped Kaluza-Klein gravitons, whose effects could be discovered for masses in the multi-TeV range
Comments on Takahashi-Tanimoto's scalar solution

We study the identity-based solution of Witten's cubic bosonic open string
field theory constructed by Takahashi and Tanimoto, which is claimed to
describe the tachyon vacuum. We argue that the observables of the solution
coincide with those of the tachyon vacuum using the method proposed by
Kishimoto and Takahashi. We also discuss how to treat the kinetic term of the
string field theory expanded around it.Comment: 25 pages, 4 figures, v3: several clarifications added, corrected
  statements about operator U, v4: comments on operator U_k are adde
(Non)-renormalization of the chiral vortical effect coefficient

We show using diagramtic arguments that in some (but not all) cases, the temperature dependent part of the chiral vortical effect coefficient is independent of the coupling constant. An interpretation of this result in terms of quantization in the effective 3 dimensional Chern-Simons theory is also given. In the language of 3D, dimensionally reduced theory, the value of the chiral vortical coefficient is related to the formula ∑ n  = 1 ∞ n  = − 1/12 . We also show that in the presence of dynamical gauge fields, the CVE coefficient is not protected from renormalization, even in the large N limit
Wilson lines and Chern-Simons flux in explicit heterotic Calabi-Yau compactifications

We study to what extent Wilson lines in heterotic Calabi-Yau compactifications lead to non-trivial H-flux via Chern-Simons terms. Wilson lines are basic ingredients for Standard Model constructions but their induced H-flux may affect the consistency of the leading order background geometry and of the two-dimensional worldsheet theory. Moreover H-flux in heterotic compactifications would play an important role for moduli stabilization and could strongly constrain the supersymmetry breaking scale. We show how to compute H-flux and the corresponding superpotential, given an explicit complete intersection Calabi-Yau compactification and choice of Wilson lines. We do so by identifying large classes of special Lagrangian submanifolds in the Calabi-Yau, understanding how the Wilson lines project onto these submanifolds, and computing their Chern-Simons invariants. We illustrate our procedure with the quintic hypersurface as well as the split-bicubic, which can provide a potentially realistic three generation model
Argyres-Douglas theories and S-duality

This article is distributed under the terms of the Creative Commons\ud
Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are creditedÂ© 2015, The Author(s).Abstract: We generalize S-duality to N = 2 superconformal field theories (SCFTs) with Coulomb branch operators of non-integer scaling dimension. As simple examples, we find minimal generalizations of the S-dualities discovered in SU(2) gauge theory with four fundamental flavors by Seiberg and Witten and in SU(3) gauge theory with six fundamental flavors by Argyres and Seiberg. Our constructions start by weakly gauging diagonal SU(2) and SU(3) flavor symmetry subgroups of two copies of a particular rank-one Argyres-Douglas theory (along with sufficient numbers of hypermultiplets to guarantee conformality of the gauging). As we explore the resulting conformal manifold of the SU(2) SCFT, we find an action of S-duality on the parameters of the theory that is reminiscent of Spin(8) triality. On the other hand, as we explore the conformal manifold of the SU(3) theory, we find that an exotic rank-two SCFT emerges in a dual SU(2) description
Type IIB flux vacua from G-theory I

We construct non-perturbatively exact four-dimensional Minkowski vacua of type IIB string theory with non-trivial fluxes. These solutions are found by gluing together, consistently with U-duality, local solutions of type IIB supergravity on T 4 × ℂ $$ {T}^4\times \mathbb{C} $$ with the metric, dilaton and flux potentials varying along ℂ $$ \mathbb{C} $$ and the flux potentials oriented along T 4 . We focus on solutions locally related via U-duality to non-compact Ricci-flat geometries. More general solutions and a complete analysis of the supersymmetry equations are presented in the companion paper [1]. We build a precise dictionary between fluxes in the global solutions and the geometry of an auxiliary K 3 surface fibered over ℂ ℙ 1 $$ \mathbb{C}{\mathrm{\mathbb{P}}}^1 $$ . In the spirit of F-theory, the flux potentials are expressed in terms of locally holomorphic functions that parametrize the complex structure moduli space of the K 3 fiber in the auxiliary geometry. The brane content is inferred from the monodromy data around the degeneration points of the fiber
Type IIB flux vacua from G-theory II

We find analytic solutions of type IIB supergravity on geometries that locally take the form Mink × M 4 × ℂ with M 4 a generalised complex manifold. The solutions involve the metric, the dilaton, NSNS and RR flux potentials (oriented along the M 4 ) parametrised by functions varying only over ℂ. Under this assumption, the supersymmetry equations are solved using the formalism of pure spinors in terms of a finite number of holomorphic functions. Alternatively, the solutions can be viewed as vacua of maximally supersymmetric supergravity in six dimensions with a set of scalar fields varying holomorphically over ℂ. For a class of solutions characterised by up to five holomorphic functions, we outline how the local solutions can be completed to four-dimensional flux vacua of type IIB theory. A detailed study of this global completion for solutions with two holomorphic functions has been carried out in the companion paper [1]. The fluxes of the global solutions are, as in F-theory, entirely codified in the geometry of an auxiliary K 3 fibration over ℂℙ 1 . The results provide a geometric construction of fluxes in F-theory
Chaos in quantum channels

We study chaos and scrambling in unitary channels by considering their
entanglement properties as states. Using out-of-time-order correlation
functions to diagnose chaos, we characterize the ability of a channel to
process quantum information. We show that the generic decay of such correlators
implies that any input subsystem must have near vanishing mutual information
with almost all partitions of the output. Additionally, we propose the
negativity of the tripartite information of the channel as a general diagnostic
of scrambling. This measures the delocalization of information and is closely
related to the decay of out-of-time-order correlators. We back up our results
with numerics in two non-integrable models and analytic results in a perfect
tensor network model of chaotic time evolution. These results show that the
butterfly effect in quantum systems implies the information-theoretic
definition of scrambling.Comment: 44+17 pages, many figures. v2: typos fixed, references added,
  statements clarified. v3: minor confusion alleviate
Non-equilibrium steady state in the hydro regime

We study the existence and properties of the non-equilibrium steady state
which arises by putting two copies of systems at different temperatures into a
thermal contact. We solve the problem for the relativistic systems that are
described by the energy-momentum of a perfect hydro with general equation of
state (EOS). In particular, we examine several simple examples: a hydro with a
linear EOS, a holographic CFT perturbed by a relevant operator and a barotropic
fluid, i.e., P = P(E). Our studies suggest that the formation of steady state
is a universal result of the hydro regime regardless of the kind of fluid.Comment: 1+17 page
Triple Higgs boson production at a 100 TeV proton-proton collider

We consider triple Higgs boson production at a future 100 TeV proton-proton
collider. We perform a survey of viable final states and compare and contrast
triple production to Higgs boson pair production. Focussing on the $hhh
\rightarrow (b\bar{b}) (b\bar{b}) (\gamma \gamma)$ final state, we construct a
baseline analysis for the Standard Model scenario and simple deformations,
demonstrating that the process merits investigation in the high-luminosity
phase of the future collider as a new probe of the self-coupling sector of the
Higgs boson.Comment: 11 pages, 6 figures, 5 tables. Added new exclusion that allows
  general triple-quartic relations. Version accepted for publication in JHE
Stringy explanation of $b \to s \ell^+ \ell^-$ anomalies

We show that the recent anomalies in $b \to s \ell^+ \ell^-$ transitions
observed by the LHCb collaboration can be accommodated within string motivated
models with a low mass $Z^{\prime}$ gauge boson. Such $Z^{\prime}$ gauge boson
can be obtained in compactifications with a low string scale. We consider a
class of intersecting D-brane models, in which different families of quarks and
leptons are simultaneously realized at different D-brane intersections. The
explanation of $b \to s \ell^+ \ell^-$ anomalies via a stringy $Z^{\prime}$
sets important restrictions on these viable D-brane constructions.Comment: 18 pages, 13 figure
A model-independent analysis of final-state interactions in \bar
  B_{d/s}^0 --> J/psi pi pi

Exploiting $B$-meson decays for Standard Model tests and beyond requires a
precise understanding of the strong final-state interactions that can be
provided model-independently by means of dispersion theory. This formalism
allows one to deduce the universal pion-pion final-state interactions from the
accurately known $\pi\pi$ phase shifts and, in the scalar sector, a
coupled-channel treatment with the kaon-antikaon system. In this work an
analysis of the decays $\bar B_d^0 \to J/\psi \pi^+\pi^-$ and $\bar B_s^0 \to
J/\psi \pi^+\pi^-$ is presented. We find very good agreement with the data up
to 1.05 GeV with a number of parameters reduced significantly compared to a
phenomenological analysis. In addition, the phases of the amplitudes are
correct by construction, a crucial feature when it comes to studies of $CP$
violation in heavy-meson decays.Comment: 25 pages, 6 figures, version published in JHE
The BMS Equation and c\bar{c} Production; A Comparison of the BMS and BK
  Equations

We introduce two processes where the BMS equation appears in a context quite
different from the original context of non-global jet observables. We note the
strong similarities of the BMS equation to the BK and FKPP equations and argue
that these, essentially identical equations, can be viewed either in terms of
the probability, or amplitude, of something not happening or in terms of the
nonlinear terms setting unitarity limits. Mostly analytic solutions are given
for (i) the probability that no $c\bar{c}$ pairs be produced in a jet decay and
(ii) the probability that no-$c\bar{c}$ pairs be produced in a high energy
dipole nucleus scattering. Both these processes obey BMS equations, albeit with
very different kernels.Comment: 14 page
Direct and indirect constraints on CP-violating Higgs-quark and
  Higgs-gluon interactions

We investigate direct and indirect constraints on the complete set of
anomalous CP-violating Higgs couplings to quarks and gluons originating from
dimension-6 operators, by studying their signatures at the LHC and in electric
dipole moments (EDMs). We show that existing uncertainties in hadronic and
nuclear matrix elements have a significant impact on the interpretation of EDM
experiments, and we quantify the improvements needed to fully exploit the power
of EDM searches. Currently, the best bounds on the anomalous CP-violating Higgs
interactions come from a combination of EDM measurements and the data from LHC
Run 1. We argue that Higgs production cross section and branching ratios
measurements at the LHC Run 2 will not improve the constraints significantly.
On the other hand, the bounds on the couplings scale roughly linearly with EDM
limits, so that future theoretical and experimental EDM developments can have a
major impact in pinning down interactions of the Higgs.Comment: Included analysis of Higgs decay processes. References adde
Exceptional field theory: $SL(5)$

In this work the exceptional field theory formulation of supergravity with
SL(5) gauge group is considered. This group appears as a U-duality group of
$D=7$ maximal supergravity. In the formalism presented the hidden global
duality group is promoted into a gauge group of a theory in dimensions 7+number
of extended directions. This work is a continuation of the series of works for
$E_{8,7,6}, SO(5,5)$ and $SL(3)\times SL(2)$ duality groups.Comment: 20 pages + Appendix; ver 2: misprints corrected, some citations
  added, the email on the title page correcte
Semi-doubled Sigma Models for Five-branes

We study two-dimensional ${\cal N}=(2,2)$ gauge theory and its dualized
system in terms of complex (linear) superfields and their alternatives.
Although this technique itself is not new, we can obtain a new model, the
so-called "semi-doubled" GLSM. Similar to doubled sigma model, this involves
both the original and dual degrees of freedom simultaneously, whilst the latter
only contribute to the system via topological interactions. Applying this to
the ${\cal N}=(4,4)$ GLSM for H-monopoles, i.e., smeared NS5-branes, we obtain
its T-dualized systems in quite an easy way. As a bonus, we also obtain the
semi-doubled GLSM for an exotic $5^3_2$-brane whose background is locally
nongeometric. In the low energy limit, we construct the semi-doubled NLSM which
also generates the conventional string worldsheet sigma models. In the case of
the NLSM for $5^3_2$-brane, however, we find that the Dirac monopole equation
does not make sense any more because the physical information is absorbed into
the divergent part via the smearing procedure. This is nothing but the signal
which indicates that the nongeometric feature emerges in the considering model.Comment: 34 pages, version published in JHE
Holographic quenches towards a Lifshitz point

We use the holographic duality to study quantum quenches of a strongly
coupled CFT that drive the theory towards a non-relativistic fixed point with
Lifshitz scaling. We consider the case of a Lifshitz dynamical exponent $z$
close to unity, where the non-relativistic field theory can be understood as a
specific deformation of the corresponding CFT and, hence, the standard
holographic dictionary can be applied. On the gravity side this amounts to
finding a dynamical bulk solution which interpolates between AdS and Lishitz
spacetimes as time evolves. We show that an asymptotically Lifshitz black hole
is always formed in the final state. This indicates that it is impossible to
reach the vacuum state of the Lifshitz theory from the CFT vacuum as a result
of the proposed quenching mechanism. The nonequilibrium dynamics following the
breaking of the relativistic scaling symmetry is also probed using both local
and non-local observables. In particular, we conclude that the equilibration
process happens in a top-down manner, i.e., the symmetry is broken faster for
UV modes.Comment: 33 pages, 4 figures. V2: minor clarifications and references added,
  new subsection and appendix included discussing the time evolution of
  correlators. Matches version to appear in JHE
Asymptotic structure of the Einstein-Maxwell theory on AdS$_{3}$

The asymptotic structure of AdS spacetimes in the context of General
Relativity coupled to the Maxwell field in three spacetime dimensions is
analyzed. Although the fall-off of the fields is relaxed with respect to that
of Brown and Henneaux, the variation of the canonical generators associated to
the asymptotic Killing vectors can be shown to be finite once required to span
the Lie derivative of the fields. The corresponding surface integrals then
acquire explicit contributions from the electromagnetic field, and become
well-defined provided they fulfill suitable integrability conditions, implying
that the leading terms of the asymptotic form of the electromagnetic field are
functionally related. Consequently, for a generic choice of boundary
conditions, the asymptotic symmetries are broken down to $\mathbb{R}\otimes
U\left(1\right)\otimes U\left(1\right)$. Nonetheless, requiring compatibility
of the boundary conditions with one of the asymptotic Virasoro symmetries,
singles out the set to be characterized by an arbitrary function of a single
variable, whose precise form depends on the choice of the chiral copy.
Remarkably, requiring the asymptotic symmetries to contain the full conformal
group selects a very special set of boundary conditions that is labeled by a
unique constant parameter, so that the algebra of the canonical generators is
given by the direct sum of two copies of the Virasoro algebra with the standard
central extension and $U\left(1\right)$. This special set of boundary
conditions makes the energy spectrum of electrically charged rotating black
holes to be well-behaved.Comment: 18 pages, no figure