pinecone/core-2020-05-10-deduplication huggingface dataset:
A study on the interplay between perturbative QCD and CSS/TMD formalism in SIDIS processes

We study the Semi-Inclusive Deep Inelastic Scattering (SIDIS) cross section as a function of the transverse momentum, q T . In order to describe it over a wide region of q T , soft gluon resummation has to be performed. Here we will use the original Collins-Soper-Sterman (CSS) formalism; however, the same procedure would hold within the improved Transverse Momentum Dependent (TMD) framework. We study the matching between the region where fixed order perturbative QCD can successfully be applied and the region where soft gluon resummation is necessary. We find that the commonly used prescription of matching through the so-called Y-factor cannot be applied in the SIDIS kinematical configurations we examine. In particular, the non-perturbative component of the resummed cross section turns out to play a crucial role and should not be overlooked even at relatively high energies. Moreover, the perturbative expansion of the resummed cross section in the matching region is not as reliable as it is usually believed and its treatment requires special attention
$W^+ W^-$ pair production in proton-proton collisions: small missing
  terms

$W^+ W^-$ production is one of the golden channels for testing the Standard
Model as well for searches beyond the Standard Model. We discuss many new
subleading processes for inclusive production of $W^+ W^-$ pairs generally not
included in the litterature so far. We focus mainly on photon-photon induced
processes. We include elastic-elastic, elastic-inelastic, inelastic-elastic and
inelastic-inelastic contributions. We also calculate the contributions with
resolved photons including the partonic substructure of the virtual photon.
Predictions for the total cross section and differential distributions in $W$-
boson rapidity and transverse momentum as well as $WW$ invariant mass are
presented. The $\gamma \gamma$ components only constitute about 1-2 \% of the
inclusive $W^+ W^-$ cross section but increases up to about 10 \% at large
$W^{\pm}$ transverse momenta, and are even comparable to the dominant $q \bar
q$ component at large $M_{WW}$, i.e. are much larger than the $g g \to W^+ W^-$
one.Comment: 26 pages, 17 figure and 1 table. arXiv admin note: substantial text
  overlap with arXiv:1309.720
Minimal muon anomalous magnetic moment

We classify all possible one-particle (scalar and fermion) extensions of the Standard Model that can contribute to the anomalous magnetic moment of leptons. We review the cases already discussed in the literature and complete the picture by performing the calculation for a fermionic doublet with hypercharge −3/2. We conclude that, out of the listed possibilities, only two scalar leptoquarks and the pseudoscalar of a peculiar two-Higgs-doublet model could be the responsibles for the muon anomalous magnetic moment discrepancy. Were this the case, this particles could be seen in the next LHC run. To this aim, especially to test the leptoquark hypothesis, we suggest to look for final states with tops and muons
Holographic mutual information and distinguishability of Wilson loop and
  defect operators

The mutual information of disconnected regions in large $N$ gauge theories
with holographic gravity duals can undergo phase transitions. These occur when
connected and disconnected bulk Ryu-Takayanagi surfaces exchange dominance.
That is, the bulk `soap bubble' snaps as the boundary regions are drawn apart.
We give a gauge-theoretic characterization of this transition: States with and
without a certain defect operator insertion -- the defect separates the
entangled spatial regions -- are shown to be perfectly distinguishable if and
only if the Ryu-Takayanagi surface is connected. Meanwhile, states with and
without a certain Wilson loop insertion -- the Wilson loop nontrivially threads
the spatial regions -- are perfectly distinguishable if and only if the
Ryu-Takayanagi surface is disconnected. The quantum relative entropy of two
perfectly distinguishable states is infinite. The results are obtained by
relating the soap bubble transition to Hawking-Page (deconfinement) transitions
in the Renyi entropies, where defect operators and Wilson loops are known to
act as order parameters.Comment: 1+21 pages. 11 figure
Generalized bootstrap equations for N=4 SCFT

We study the consistency of four-point functions of half-BPS chiral primary
operators of weight p in four-dimensional N=4 superconformal field theories.
The resulting conformal bootstrap equations impose non-trivial bounds for the
scaling dimension of unprotected local operators transforming in various
representations of the R-symmetry group. These bounds generalize recent bounds
for operators in the singlet representation, arising from consistency of the
four-point function of the stress-energy tensor multiplet.Comment: 18 pages, 3 figure
Strong Coupling Expansion for the Conformal Pomeron/Odderon Trajectories

From the perspective of AdS/CFT the Pomeron is identified with a Reggeized
Graviton, while the Odderons correspond to Reggeized anti-symmetric $AdS_5$
Kalb-Ramond tensor-fields. In this paper, we consider the strong coupling
expansion of the dimension of the leading twist operators dual to these Regge
trajectories, $\Delta(j)$, to determine its analytic continuation in $j$ beyond
the diffusion limit. In particular, we compute the strong coupling expansion of
the intercept to order $\lambda^{-3}$, where $\lambda$ is the t'Hooft coupling,
for both the Pomeron, which is $C=+1$ crossing-even, and the "Odderons", which
are the leading $C=-1$ crossing-odd Regge singularities. We discuss the
spectral curves of the class of single-trace operators to which these string
modes couple.Comment: 27 pages, 4 figures; v2 added clarifying remark
CP Violation with Majorana neutrinos in K Meson Decays

We study the possibility of having CP asymmetries in the decay Kaon(+/-) ->
pion(-/+) lepton(+/-) lepton(+/-) (lepton = muon or electron). This decay
violates Lepton Number by two units and occurs only if there are Majorana
particles that mediate the transition. Even though the absolute rate is highly
suppressed by current bounds, we search for Majorana neutrino scenarios where
the CP asymmetry arising from the lepton sector could be sizeable. This is
indeed the case if there are two or more Majorana neutrinos with similar masses
in the range around 10^2 MeV. In particular, the asymmetry is potentially near
unity if two neutrinos are nearly degenerate, in the sense that the mass
difference is similar to the decay rate. The full decay, however, may be
difficult to detect not only because of the suppression caused by the
heavy-to-light lepton mixing, but also because of the long lifetime of the
heavy neutrino, which would induce large space separation between the two
vertices where the charge leptons are produced. This particular problem should
be less serious in heavier meson decays, as they involve heavier neutrinos with
shorter lifetimes.Comment: 13 pages, 5 figure
Convergence of Derivative Expansion in Supersymmetric Functional RG
  Flows

We confirm the convergence of the derivative expansion in two supersymmetric
models via the functional renormalization group method. Using pseudo-spectral
methods, high-accuracy results for the lowest energies in supersymmetric
quantum mechanics and a detailed description of the supersymmetric analogue of
the Wilson-Fisher fixed point of the three-dimensional Wess-Zumino model are
obtained. The superscaling relation proposed earlier, relating the relevant
critical exponent to the anomalous dimension, is shown to be valid to all
orders in the supercovariant derivative expansion and for all $d \ge 2$
Elliptic genera of ALE and ALF manifolds from gauged linear sigma models

We compute the equivariant elliptic genera of several classes of ALE and ALF
manifolds using localization in gauged linear sigma models. In the sigma model
computation the equivariant action corresponds to chemical potentials for U(1)
currents and the elliptic genera exhibit interesting pole structure as a
function of the chemical potentials. We use this to decompose the answers into
polar terms that exhibit wall crossing and universal terms. We compare our
results to previous results on the large radius limit of the Taub-NUT elliptic
genus and also discuss applications of our results to counting of BPS
world-sheet spectrum of monopole strings in the 5d N=2 super Yang-Mills theory
and self-dual strings in the 6d N=(2,0) theories.Comment: 1+60 page
Unification of SUSY breaking and GUT breaking

We build explicit supersymmetric unification models where grand unified gauge symmetry breaking and supersymmetry (SUSY) breaking are caused by the same sector. Besides, the SM-charged particles are also predicted by the symmetry breaking sector, and they give the soft SUSY breaking terms through the so-called gauge mediation. We investigate the mass spectrums in an explicit model with SU(5) and additional gauge groups, and discuss its phenomenological aspects. Especially, nonzero A-term and B-term are generated at one-loop level according to the mediation via the vector superfields, so that the electro-weak symmetry breaking and 125 GeV Higgs mass may be achieved by the large B-term and A-term even if the stop mass is around 1 TeV
M-theoretic matrix models

Some matrix models admit, on top of the usual 't Hooft expansion, an
M-theory-like expansion, i.e. an expansion at large N but where the rest of the
parameters are fixed, instead of scaling with N. These models, which we call
M-theoretic matrix models, appear in the localization of Chern-Simons-matter
theories, and also in two-dimensional statistical physics. Generically, their
partition function receives non-perturbative corrections which are not captured
by the 't Hooft expansion. In this paper, we discuss general aspects of these
type of matrix integrals and we analyze in detail two different examples. The
first one is the matrix model computing the partition function of N=4
supersymmetric Yang-Mills theory in three dimensions with one adjoint
hypermultiplet and N_f fundamentals, which has a conjectured M-theory dual, and
which we call the N_f matrix model. The second one, which we call the polymer
matrix model, computes form factors of the 2d Ising model and is related to the
physics of 2d polymers. In both cases we determine their exact planar limit. In
the N_f matrix model, the planar free energy reproduces the expected behavior
of the M-theory dual. We also study their M-theory expansion by using Fermi gas
techniques, and we find non-perturbative corrections to the 't Hooft expansion.Comment: 38 pages, 3 figures; v2: Added references and results on genus one
  free energy: minor correction
A Worldsheet Theory for Supergravity

We present a worldsheet theory that describes maps into a curved target space
equipped with a B-field and dilaton. The conditions for the theory to be
consistent at the quantum level can be computed exactly, and are that the
target space fields obey the nonlinear d=10 supergravity equations of motion,
with no higher curvature terms. The path integral is constrained to obey a
generalization of the scattering equations to curved space. Remarkably, the
supergravity field equations emerge as quantum corrections to these curved
space scattering equations.Comment: 17 pages, no figures. v2: references added, published versio
Jet-Images: Computer Vision Inspired Techniques for Jet Tagging

We introduce a novel approach to jet tagging and classification through the
use of techniques inspired by computer vision. Drawing parallels to the problem
of facial recognition in images, we define a jet-image using calorimeter towers
as the elements of the image and establish jet-image preprocessing methods. For
the jet-image processing step, we develop a discriminant for classifying the
jet-images derived using Fisher discriminant analysis. The effectiveness of the
technique is shown within the context of identifying boosted hadronic W boson
decays with respect to a background of quark- and gluon- initiated jets. Using
Monte Carlo simulation, we demonstrate that the performance of this technique
introduces additional discriminating power over other substructure approaches,
and gives significant insight into the internal structure of jets
A quasi-finite basis for multi-loop Feynman integrals

We present a new method for the decomposition of multi-loop Euclidean Feynman integrals into quasi-finite Feynman integrals. These are defined in shifted dimensions with higher powers of the propagators, make explicit both infrared and ultraviolet divergences, and allow for an immediate and trivial expansion in the parameter of dimensional regularization. Our approach avoids the introduction of spurious structures and thereby leaves integrals particularly accessible to direct analytical integration techniques. Alternatively, the resulting convergent Feynman parameter integrals may be evaluated numerically. Our approach is guided by previous work by the second author but overcomes practical limitations of the original procedure by employing integration by parts reduction
Tension of confining strings at low temperature

In the low temperature confining phase of QCD or QCD-like theories it is challenging to capture the temperature dependence of observables through AdS/CFT. Using the blackfold approach we compute the quark-anti-quark linear static potential in the low temperature confining phase, taking into account the thermal excitations of the string. We find the explicit temperature dependence of the string tension and notice that, as naturally expected, tension decreases as temperature increases. We have also generalized the blackfold approach for the computation of the Wilson loops, making it directly applicable to a large class of backgrounds
h → γγ in U(1) R -lepton number model with a right-handed neutrino

We perform a detailed study of the signal rate of the lightest Higgs boson in the diphoton channel ( μ γγ ), recently analyzed by both the ATLAS and CMS collaborations at the Large Hadron Collider, in the framework of U(1) R − lepton number model with a right handed neutrino superfield. The corresponding neutrino Yukawa coupling, ‘ f ’, plays a very important role in the phenomenology of this model. A large value of f ∼ O 1 $$ f\sim \mathcal{O}(1) $$ provides an additional tree level contribution to the lightest Higgs boson mass along with a very light (mass ∼ a few hundred MeV) bino like neutralino and a small tree level mass of one of the active neutrinos that is compatible with various experimental results. In the presence of this light neutralino, the total decay width of the Higgs boson and its various branching fractions are affected. When studied in conjunction with the recent LHC results, these put significant constraints on the parameter space. The signal rate μ γγ obtained in this scenario is compatible with the recent results from both the ATLAS and the CMS collaborations at 1 σ level. A small value of ‘ f ’, on the other hand, is compatible with a sterile neutrino acting as a 7 keV dark matter that can explain the observation of a mono-energetic X-ray photon line by the XMM-Newton X-ray observatory. Because of the absence of a light neutralino, the total decay width of the lightest Higgs boson in this case remains close to the SM expectation. Hence, in the small ‘ f ’ scenario we obtain a relatively larger value of μ γγ which is closer to the central values reported recently by these two collaborations
Ramond-Ramond gauge fields in superspace with manifest T-duality

A superspace with manifest T-duality including Ramond-Ramond gauge fields is presented. The superspace is defined by the double nondegenerate super-Poincaré algebras where Ramond-Ramond charges are introduced by central extension. This formalism allows a simple treatment that all the supergravity multiplets are in a vielbein superfield and all torsions with dimension 1 and less are trivial. A Green-Schwarz superstring action is also presented where the Wess-Zumino term is given in a bilinear form of local currents. Equations of motion are separated into left and right modes in a suitable gauge
Global Structure of Curves from Generalized Unitarity Cut of Three-loop
  Diagrams

This paper studies the global structure of algebraic curves defined by
generalized unitarity cut of four-dimensional three-loop diagrams with eleven
propagators. The global structure is a topological invariant that is
characterized by the geometric genus of the algebraic curve. We use the
Riemann-Hurwitz formula to compute the geometric genus of algebraic curves with
the help of techniques involving convex hull polytopes and numerical algebraic
geometry. Some interesting properties of genus for arbitrary loop orders are
also explored where computing the genus serves as an initial step for integral
or integrand reduction of three-loop amplitudes via an algebraic geometric
approach.Comment: 35pages, 10 figures, version appeared in JHE
Two Species of Vortices in a massive Gauged Non-linear Sigma Model

Non-linear sigma models with scalar fields taking values on
$\mathbb{C}\mathbb{P}^n$ complex manifolds are addressed. In the simplest $n=1$
case, where the target manifold is the $\mathbb{S}^2$ sphere, we describe the
scalar fields by means of stereographic maps. In this case when the
$\mathbb{U}(1)$ symmetry is gauged and Maxwell and mass terms are allowed, the
model accommodates stable self-dual vortices of two kinds with different
energies per unit length and where the Higgs field winds at the cores around
the two opposite poles of the sphere. Allowing for dielectric functions in the
magnetic field, similar and richer self-dual vortices of different species in
the south and north charts can be found by slightly modifying the potential.
Two different situations are envisaged: either the vacuum orbit lies on a
parallel in the sphere, or one pole and the same parallel form the vacuum
orbit. Besides the self-dual vortices of two species, there exist BPS domain
walls in the second case. Replacing the Maxwell contribution of the gauge field
to the action by the second Chern-Simons secondary class, only possible in
$(2+1)$-dimensional Minkowski space-time, new BPS topological defects of two
species appear. Namely, both BPS vortices and domain ribbons in the south and
the north charts exist because the vacuum orbit consits of the two poles and
one parallel. Formulation of the gauged $\mathbb{C}\mathbb{P}^2$ model in a
Reference chart shows a self-dual structure such that BPS semi-local vortices
exist. The transition functions to the second or third charts break the
$\mathbb{U}(1)\times\mathbb{S}\mathbb{U}(2)$ semi-local symmetry, but there is
still room for standard self-dual vortices of the second species. The same
structures encompassing $N$ complex scalar fields are easily generalized to
gauged $\mathbb{C}\mathbb{P}^N$ models.Comment: 39 pages, 23 figures (extended version), to be published in JHE
Probing anomalous $t\bar t Z$ interactions with rare meson decays

Anomalous couplings of the $Z$ boson to top quarks are only marginally constrained by direct searches and are still sensitive to new particle dynamics at the TeV scale. Employing an effective field theory approach we consider the dimension-six operators which generate deviations from the standard-model vector and axial-vector interactions. We show that rare $B$ and $K$ meson decays together with electroweak precision observables provide strong constraints on these couplings. We also consider constraints from t-channel single-top production
Probing the scotogenic model with lepton flavor violating processes

We study the impact that future lepton flavor violating experiments will have on the viable parameter space of the scotogenic model. Within this model, the dark matter particle is assumed to be the lightest singlet fermion and two cases are considered depending on how its relic density is obtained: via self-annihilations or via coannihilations with the scalars. For each case, a scan over the parameter space of the model is used to obtain a large sample of viable points, which we subsequently analyze. We find that future lepton flavor violating experiments, in particular those searching for μ → 3 e and μ - e conversion in nuclei, will probe the parameter space of the scotogenic model in a significant way. They may exclude a large fraction of the models where the dark matter density is determined by coannihilations, and could rule out all the models where it is determined by annihilations
Supersymmetry of AdS and flat backgrounds in M-theory

We give a systematic description of all warped $AdS_n$ and
${\mathbb{R}}^{n-1,1}$ backgrounds of M-theory and identify the a priori number
of supersymmetries that these backgrounds preserve. In particular, we show that
$AdS_n$ backgrounds preserve $N= 2^{[{n\over2}]} k$ for $n\leq4$ and $N=
2^{[{n\over2}]+1} k$ for $4<n\leq 7$ supersymmetries while
${\mathbb{R}}^{n-1,1}$ backgrounds preserve $N= 2^{[{n\over2}]} k$ for $n\leq4$
and $N= 2^{[{n+1\over2}]} k$ for $4<n\leq7$, supersymmetries. Furthermore for
$AdS_n$ backgrounds that satisfy the requirements for the maximum principle to
hold, we show that the Killing spinors can be identified with the zero modes of
Dirac-like operators on $M^{11-n}$ coupled to fluxes thus establishing a new
class of Lichnerowicz type theorems. We also demonstrate that the Killing
spinors of generic warped $AdS_n$ backgrounds do not factorize into products of
Killing spinors on $AdS_n$ and Killing spinors on the transverse space.Comment: 37 pages, late
Conformal correlators of mixed-symmetry tensors

We generalize the embedding formalism for conformal field theories to the case of general operators with mixed symmetry. The index-free notation encoding symmetric tensors as polynomials in an auxiliary polarization vector is extended to mixed-symmetry tensors by introducing a new commuting or anticommuting polarization vector for each row or column in the Young diagram that describes the index symmetries of the tensor. We determine the tensor structures that are allowed in n -point conformal correlation functions and give an algorithm for counting them in terms of tensor product coefficients. A simple derivation of the unitarity bound for arbitrary mixed-symmetry tensors is obtained by considering the conservation condition in embedding space. We show, with an example, how the new formalism can be used to compute conformal blocks of arbitrary external fields for the exchange of any conformal primary and its descendants. The matching between the number of tensor structures in conformal field theory correlators of operators in d dimensions and massive scattering amplitudes in d + 1 dimensions is also seen to carry over to mixed-symmetry tensors
Erratum to: Measurement of the inclusive jet cross-section in proton-proton collisions at √s=7 TeV using 4.5 fb−1 of data with the ATLAS detector

It was found that the non-perturbative corrections calculated using Pythia with the Perugia 2011 tune did not include the effect of the underlying event. The affected correction factors were recomputed using the Pythia 6.427 generator. These corrections are applied as baseline to the NLO pQCD calculations and thus the central values of the theoretical predictions have changed by a few percent with the new corrections. This has a minor impact on the agreement between the data and the theoretical predictions. Figures 2 and 6 to 13, and all the tables have been updated with the new values. A few sentences in the discussion in sections 5.2 and 9 were altered or removed. \ud
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The online version of the original article can be found at http://dx.doi.org/10.1007/JHEP02(2015)153