pinecone/core-2020-05-10-deduplication huggingface dataset:
Consistent Searches for SMEFT Effects in Non-Resonant Dijet Events

We investigate the bounds which can be placed on generic new-physics
contributions to dijet production at the LHC using the framework of the
Standard Model Effective Field Theory, deriving the first consistently-treated
EFT bounds from non-resonant high-energy data. We recast an analysis searching
for quark compositeness, equivalent to treating the SM with one
higher-dimensional operator as a complete UV model. In order to reach
consistent, model-independent EFT conclusions, it is necessary to truncate the
EFT effects consistently at order $1/\Lambda^2$ and to include the possibility
of multiple operators simultaneously contributing to the observables, neither
of which has been done in previous searches of this nature. Furthermore, it is
important to give consistent error estimates for the theoretical predictions of
the signal model, particularly in the region of phase space where the probed
energy is approaching the cutoff scale of the EFT. There are two linear
combinations of operators which contribute to dijet production in the SMEFT
with distinct angular behavior; we identify those linear combinations and
determine the ability of LHC searches to constrain them simultaneously.
Consistently treating the EFT generically leads to weakened bounds on
new-physics parameters. These constraints will be a useful input to future
global analyses in the SMEFT framework, and the techniques used here to
consistently search for EFT effects are directly applicable to other
off-resonance signals.Comment: v1: 23 pages, 9 figures, 3 tables; v2: references added, typos
  corrected, matches version published in JHE
Integrability of Conformal Fishnet Theory

We study integrability of fishnet-type Feynman graphs arising in planar
four-dimensional bi-scalar chiral theory recently proposed in arXiv:1512.06704
as a special double scaling limit of gamma-deformed $\mathcal{N}=4$ SYM theory.
We show that the transfer matrix "building" the fishnet graphs emerges from the
$R-$matrix of non-compact conformal $SU(2,2)$ Heisenberg spin chain with spins
belonging to principal series representations of the four-dimensional conformal
group. We demonstrate explicitly a relationship between this integrable spin
chain and the Quantum Spectral Curve (QSC) of $\mathcal{N}=4$ SYM. Using QSC
and spin chain methods, we construct Baxter equation for $Q-$functions of the
conformal spin chain needed for computation of the anomalous dimensions of
operators of the type $\text{tr}(\phi_1^J)$ where $\phi_1$ is one of the two
scalars of the theory. For $J=3$ we derive from QSC a quantization condition
that fixes the relevant solution of Baxter equation. The scaling dimensions of
the operators only receive contributions from wheel-like graphs. We develop
integrability techniques to compute the divergent part of these graphs and use
it to present the weak coupling expansion of dimensions to very high orders.
Then we apply our exact equations to calculate the anomalous dimensions with
$J=3$ to practically unlimited precision at any coupling. These equations also
describe an infinite tower of local conformal operators all carrying the same
charge $J=3$. The method should be applicable for any $J$ and, in principle, to
any local operators of bi-scalar theory. We show that at strong coupling the
scaling dimensions can be derived from semiclassical quantization of finite gap
solutions describing an integrable system of noncompact $SU(2,2)$ spins. This
bears similarities with the classical strings arising in the strongly coupled
limit of $\mathcal{N}=4$ SYM.Comment: 71 pages, 14 figure
Higgs decay into four charged leptons in the presence of dimension-six
  operators

We study the indirect effects of New Physics in the Higgs decay into four
charged leptons, using an Effective Field Theory (EFT) approach to Higgs
interactions. We evaluate the deviations induced by the EFT dimension-six
operators in observables like partial decay width and various kinematic
distributions, including angular observables, and compare them with the
contribution of the full SM electroweak corrections. The calculation is
implemented in an improved version of the event generator Hto4l, which can
provide predictions in terms of different EFT-bases and is available for data
analysis at the LHC. We also perform a phenomenological study in order to
assess the benefits coming from the inclusion of differential information in
the future analyses of very precise data which will be collected during the
high luminosity phase of the LHC.Comment: 31 pages, 8 figures, 1 table. Version to appear on JHEP, expanded
  phenomenological section including an analysis for HL-LH
Entanglement of purification: from spin chains to holography

Purification is a powerful technique in quantum physics whereby a mixed
quantum state is extended to a pure state on a larger system. This process is
not unique, and in systems composed of many degrees of freedom, one natural
purification is the one with minimal entanglement. Here we study the entropy of
the minimally entangled purification, called the entanglement of purification,
in three model systems: an Ising spin chain, conformal field theories
holographically dual to Einstein gravity, and random stabilizer tensor
networks. We conjecture values for the entanglement of purification in all
these models, and we support our conjectures with a variety of numerical and
analytical results. We find that such minimally entangled purifications have a
number of applications, from enhancing entanglement-based tensor network
methods for describing mixed states to elucidating novel aspects of the
emergence of geometry from entanglement in the AdS/CFT correspondence.Comment: 40 pages, multiple figures. v2: references added, typos correcte
Left-handed and right-handed U(1) gauge symmetry

We propose a model with the left-handed and right-handed continuous Abelian
gauge symmetry; $U(1)_L\times U(1)_R$. Then three right-handed neutrinos are
naturally required to achieve $U(1)_R$ anomaly cancellations, while several
mirror fermions are also needed to do $U(1)_L$ anomaly cancellations. Then we
formulate the model, and discuss its testability of the new gauge interactions
at collider physics such as the large hadron collider (LHC) and the
international linear collider (ILC). In particular, we can investigate chiral
structure of the interactions by the analysis of forward-backward asymmetry
based on polarized beam at the ILC.Comment: 15 pages, 2 tables, 2 figure
The holographic dual of the Penrose transform

We consider the holographic duality between type-A higher-spin gravity in
AdS_4 and the free U(N) vector model. In the bulk, linearized solutions can be
translated into twistor functions via the Penrose transform. We propose a
holographic dual to this transform, which translates between twistor functions
and CFT sources and operators. We present a twistorial expression for the
partition function, which makes global higher-spin symmetry manifest, and
appears to automatically include all necessary contact terms. In this picture,
twistor space provides a fully nonlocal, gauge-invariant description underlying
both bulk and boundary spacetime pictures. While the bulk theory is handled at
the linear level, our formula for the partition function includes the effects
of bulk interactions. Thus, the CFT is used to solve the bulk, with twistors as
a language common to both. A key ingredient in our result is the study of
ordinary spacetime symmetries within the fundamental representation of
higher-spin algebra. The object that makes these "square root" spacetime
symmetries manifest becomes the kernel of our boundary/twistor transform, while
the original Penrose transform is identified as a "square root" of CPT.Comment: 82 pages, 1 figure; v2: JHEP version - expanded exposition and
  references, improved the discussion of contact effect
Delocalizing Entanglement of Anisotropic Black Branes

We study the mutual information between pairs of regions on the two
asymptotic boundaries of maximally-extended anisotropic black-brane solutions.
This quantity characterizes the local pattern of entanglement of thermofield
double states which are dual to these geometries. We analyse the disruption of
the mutual information in anisotropic shock wave geometries and show that the
entanglement velocity plays an important role in this phenomenon. Besides that
we compute several chaos-related properties of this system, like the
entanglement velocity, the butterfly velocity and the scrambling time. We find
that the butterfly velocity and the entanglement velocity violate the upper
bounds proposed in 1311.1200 and 1612.00082, but remain bounded by their
corresponding values in the infrared effective theory.Comment: 34 pages, 10 figures. V2: typos corrected and references added.
  Analysis extended to higher anisotropies. Figures 3, 6(a) and 8(b) replaced
  to include higher anisotropies. Figures 6(b), 7(a) and 7(b) replaced to
  improve visualization. Minor changes in the end of the abstract and
  introduction. Two figures added in App. C. Discussion and App.C expanded. V3:
  Matches published versio
Simulations of Cold Electroweak Baryogenesis: Quench from portal
  coupling to new singlet field

We compute the baryon asymmetry generated from Cold Electroweak Baryogenesis,
when a dynamical Beyond-the-Standard-Model scalar singlet field triggers the
spinodal transition. Using a simple potential for this additional field, we
match the speed of the quench to earlier simulations with a "by-hand" mass
flip. We find that for the parameter subspace most similar to a by-hand
transition, the final baryon asymmetry shows a similar dependence on quench
time and is of the same magnitude. For more general parameter choices the
Higgs-singlet dynamics can be very complicated, resulting in an enhancement of
the final baryon asymmetry. Our results validate and generalise results of
simulations in the literature and open up the Cold Electroweak Baryogenesis
scenario to further model building.Comment: 23 pages, 11 figure
The Analytic Bootstrap in Fermionic CFTs

We apply the method of the large spin bootstrap to analyse fermionic
conformal field theories with weakly broken higher spin symmetry. Through the
study of correlators of composite operators, we find the anomalous dimensions
and OPE coefficients in the Gross-Neveu model in $d=2+\varepsilon$ dimensions
and the Gross-Neveu-Yukawa model in $d=4-\varepsilon$ dimensions, based only on
crossing symmetry. Furthermore a non-trivial solution in the $d=2+\varepsilon$
expansion is found for a fermionic theory in which the fundamental field is not
part of the spectrum. The results are perturbative in $\varepsilon$ and valid
to all orders in the spin, reproducing known results for operator dimensions
and providing some new results for operator dimensions and OPE coefficients.Comment: 42+3 pages, no figure
The Torus Operator in Holography

We consider the non-local operator ${\mathcal T}$ defined in 2-dimensional
CFTs by the path integral over a torus with two punctures. Using the AdS/CFT
correspondence, we study the spectrum and ground state of this operator in
holographic such CFTs in the limit of large central charge $c$. In one region
of moduli space, we argue that the operator retains a finite gap and has a
ground state that differs from the CFT vacuum only by order one corrections. In
this region the torus operator is much like the cylinder operator. But in
another region of moduli space we find a puzzle. Although our ${\mathcal T}$ is
of the manifestly positive form $A^\dagger A$, studying the most tractable
phases of $\text{Tr}( {\mathcal T}^n)$ suggests that ${\mathcal T}$ has
negative eigenvalues. It seems clear that additional phases must become
relevant at large $n$, perhaps leading to novel behavior associated with a
radically different ground state or a much higher density of states. By
studying the action of two such torus operators on the CFT ground state, we
also provide evidence that, even at large $n$, the relevant bulk saddles have
$t=0$ surfaces with small genus.Comment: 42 pages, 24 figures, introduction rewritten for clarity, appendix
  adde
Large-N CP(N-1) sigma model on a finite interval and the renormalized
  string energy

We continue the analysis started in a recent paper of the large-N
two-dimensional CP(N-1) sigma model, defined on a finite space interval L with
Dirichlet (or Neumann) boundary conditions. Here we focus our attention on the
problem of the renormalized energy density $\mathcal{E}(x,\Lambda,L)$ which is
found to be a sum of two terms, a constant term coming from the sum over modes,
and a term proportional to the mass gap. The approach to
$\mathcal{E}(x,\Lambda,L)\to\tfrac{N}{4\pi}\Lambda^2$ at large $L\Lambda$ is
shown, both analytically and numerically, to be exponential: no power
corrections are present and in particular no L\"uscher term appears. This is
consistent with the earlier result which states that the system has a unique
massive phase, which interpolates smoothly between the classical weakly-coupled
limit for $L\Lambda\to 0$ and the "confined" phase of the standard CP(N-1)
model in two dimensions for $L\Lambda\to\infty$.Comment: LaTeX: 32 pages, 11 figures; V2: appendices E and F added and typos
  corrected; V3: grant information adde
Antisymmetric Wilson loops in $\mathcal{N}=4$ SYM beyond the planar
  limit

We study the $\frac{1}{2}$-BPS circular Wilson loop in the totally
antisymmetric representation of the gauge group in $\mathcal N =4 $
supersymmetric Yang-Mills. This observable is captured by a Gaussian matrix
model with appropriate insertion. We compute the first $1/N$ correction at
leading order in 't Hooft coupling by means of the matrix model loop equations.
Disagreement with the 1-loop effective action of the holographically dual
$D5$-brane suggests the need to account for gravitational backreaction on the
string theory side.Comment: 20 pages, 4 figures; typos fixed, references adde
Heavy Higgs Searches: Flavour Matters

We point out that the stringent lower bounds on the masses of additional
electrically neutral and charged Higgs bosons crucially depend on the flavour
structure of their Yukawa interactions. We show that these bounds can easily be
evaded by the introduction of flavour-changing neutral currents in the Higgs
sector. As an illustration, we study the phenomenology of a two Higgs doublet
model with a Yukawa texture singling out the third family of quarks and
leptons. We combine constraints from low-energy flavour physics measurements,
LHC measurements of the 125 GeV Higgs boson rates, and LHC searches for new
heavy Higgs bosons. We propose novel LHC searches that could be performed in
the coming years to unravel the existence of these new Higgs bosons.Comment: 41 pages, 11 figures and 4 tables (v2: References added. Comment on
  associated production with a top quark added. Matched published version.
A Symmetry Breaking Scenario for QCD$_3$

We consider the dynamics of 2+1 dimensional $SU(N)$ gauge theory with
Chern-Simons level $k$ and $N_f$ fundamental fermions. By requiring consistency
with previously suggested dualities for $N_f\leq 2k$ as well as the dynamics at
$k=0$ we propose that the theory with $N_f> 2k$ breaks the $U(N_f)$ global
symmetry spontaneously to $U(N_f/2+k)\times U(N_f/2-k)$. In contrast to the 3+1
dimensional case, the symmetry breaking takes place in a range of quark masses
and not just at one point. The target space never becomes parametrically large
and the Nambu-Goldstone bosons are therefore not visible semi-classically. Such
symmetry breaking is argued to take place in some intermediate range of the
number of flavors, $2k< N_f< N_*(N,k)$, with the upper limit $N_*$ obeying
various constraints. The Lagrangian for the Nambu-Goldstone bosons has to be
supplemented by nontrivial Wess-Zumino terms that are necessary for the
consistency of the picture, even at $k=0$. Furthermore, we suggest two scalar
dual theories in this range of $N_f$. A similar picture is developed for
$SO(N)$ and $Sp(N)$ gauge theories. It sheds new light on monopole condensation
and confinement in the $SO(N)$ and $Spin(N)$ theories.Comment: 25 pages, 6 figures. v2 added references, minor corrections, new
  material about symmetry breaking in U(1) gauge theorie
Time-Reversal Breaking in QCD$_4$, Walls, and Dualities in 2+1
  Dimensions

We study $SU(N)$ Quantum Chromodynamics (QCD) in 3+1 dimensions with $N_f$
degenerate fundamental quarks with mass $m$ and a $\theta$-parameter. For
generic $m$ and $\theta$ the theory has a single gapped vacuum. However, as
$\theta$ is varied through $\theta=\pi$ for large $m$ there is a first order
transition. For $N_f=1$ the first order transition line ends at a point with a
massless $\eta'$ particle (for all $N$) and for $N_f>1$ the first order
transition ends at $m=0$, where, depending on the value of $N_f$, the IR theory
has free Nambu-Goldstone bosons, an interacting conformal field theory, or a
free gauge theory. Even when the $4d$ bulk is smooth, domain walls and
interfaces can have interesting phase transitions separating different $3d$
phases. These turn out to be the phases of the recently studied $3d$
Chern-Simons matter theories, thus relating the dynamics of QCD$_4$ and
QCD$_3$, and, in particular, making contact with the recently discussed
dualities in 2+1 dimensions. For example, when the massless $4d$ theory has an
$SU(N_f)$ sigma model, the domain wall theory at low (nonzero) mass supports a
$3d$ massless $CP^{N_f-1}$ nonlinear $\sigma$-model with a Wess-Zumino term, in
agreement with the conjectured dynamics in 2+1 dimensions.Comment: 32 pages. v2: references added, improved discussion of anomalies in
  Chern-Simons theorie
Universality of fast quenches from the conformal perturbation theory

We consider global quantum quenches, a protocol when a continuous field
theoretic system in the ground state is driven by a homogeneous time-dependent
external interaction. When the typical inverse time scale of the interaction is
much larger than all relevant scales except for the UV-cutoff the system's
response exhibits universal scaling behavior. We provide both qualitative and
quantitative explanations of this universality and argue that physics of the
response during and shortly after the quench is governed by the conformal
perturbation theory around the UV fixed point. We proceed to calculate the
response of one and two-point correlation functions confirming and generalizing
universal scalings found previously. Finally, we discuss late time behavior
after the quench and argue that all local quantities will equilibrate to their
thermal values specified by an excess energy acquired by the system during the
quench.Comment: published version, refs added, minor typos corrected, 38 pages, no
  fgiure
Anomalous dimensions of spinning operators from conformal symmetry

We compute, to the first non-trivial order in the $\epsilon$-expansion of a
perturbed scalar field theory, the anomalous dimensions of an infinite class of
primary operators with arbitrary spin $\ell=0,1,..$, including as a particular
case the weakly broken higher-spin currents, using only constraints from
conformal symmetry. Following the bootstrap philosophy, no reference is made to
any Lagrangian, equations of motion or coupling constants. Even the space
dimensions d are left free. The interaction is implicitly turned on through the
local operators by letting them acquire anomalous dimensions. When matching
certain four-point and five-point functions with the corresponding quantities
of the free field theory in the $\epsilon\to 0$ limit, no free parameter
remains. It turns out that only the expected discrete d values are permitted
and the ensuing anomalous dimensions reproduce known results for the weakly
broken higher-spin currents and provide new results for the other spinning
operators.Comment: 20 pages.v2: an important remark and references added, more examples
  include
The Action of the (free) $(4,0)$-theory

The $(4,0)$ theory in six dimensions is an exotic theory of supergravity that
has been argued to emerge as the strong coupling limit of theories having $N=8$
supergravity as their low energy effective theory in five spacetime dimensions.
It has maximal supersymmetry and is superconformal. Very little is known about
this intriguing theory. While the spectrum of fields occurring in its
description has been given and their equations of motion in the absence of
interactions have been written down, no action principle has been formulated,
even in the free case. We extend here previous analyses by writing explicitly
the action of the free $(4,0)$ theory from which the equations of motion
derive. The variables of the variational principle are prepotentials adapted to
the self-duality properties of the fields. The "exotic gravitini", described by
chiral fermionic two-forms, are given special attention. The supersymmetry
transformations are written down and the invariance of the action is explicitly
proven. Even though the action is not manifestly covariant, the symmetry
transformations are shown to close according to the $(4,0)$-extended Poincar\'e
supersymmetry algebra. We also discuss exotic supergravity models with fewer
supersymmetries. Remarks on dimensional reduction close the paper.Comment: v2: some typos corrected, references update
Renyi Entropy for Local Quenches in 2D CFTs from Numerical Conformal
  Blocks

We study the time evolution of Renyi entanglement entropy for locally excited
states in two dimensional large central charge CFTs. It generically shows a
logarithmical growth and we compute the coefficient of $\log t$ term. Our
analysis covers the entire parameter regions with respect to the replica number
$n$ and the conformal dimension $h_O$ of the primary operator which creates the
excitation. We numerically analyse relevant vacuum conformal blocks by using
Zamolodchikov's recursion relation. We find that the behavior of the conformal
blocks in two dimensional CFTs with a central charge $c$, drastically changes
when the dimensions of external primary states reach the value $c/32$. In
particular, when $h_O\geq c/32$ and $n\geq 2$, we find a new universal formula
$\Delta S^{(n)}_A\simeq \frac{nc}{24(n-1)}\log t$. Our numerical results also
confirm existing analytical results using the HHLL approximation.Comment: 24 pages, 8 figure
Generalized Parallelizable Spaces from Exceptional Field Theory

Generalized parallelizable spaces allow a unified treatment of consistent
maximally supersymmetric truncations of ten- and eleven-dimensional
supergravity in generalized geometry. Known examples are spheres, twisted tori
and hyperboloides. They admit a generalized frame field over the coset space
$M$=$G/H$ which reproduces the Lie algebra $\mathfrak{g}$ of $G$ under the
generalized Lie derivative. An open problem is a systematic construction of
these spaces and especially their generalized frames fields. We present a
technique which applies to $\dim M$=4 for SL(5) exceptional field theory. In
this paper the group manifold $G$ is identified with the extended space of the
exceptional field theory. Subsequently, the section condition is solved to
remove unphysical directions from the extended space. Finally, a SL(5)
generalized frame field is constructed from parts of the left-invariant
Maurer-Cartan form on $G$. All these steps impose conditions on $G$ and $H$.Comment: 63 pages, 1 figure, 1 table, comments welcom
Momentum conservation and unitarity in parton showers and NLL
  resummation

We present a systematic study of differences between NLL resummation and
parton showers. We first construct a Markovian Monte-Carlo algorithm for
resummation of additive observables in electron-positron annihilation.
Approximations intrinsic to the pure NLL result are then removed, in order to
obtain a traditional, momentum and probability conserving parton shower based
on the coherent branching formalism. The impact of each approximation is
studied, and an overall comparison is made between the parton shower and pure
NLL resummation. Differences compared to modern parton-shower algorithms
formulated in terms of color dipoles are analyzed.Comment: 13 pages, 1 table, 8 figure