pinecone/core-2020-05-10-deduplication huggingface dataset:
A fast and accurate method for perturbative resummation of transverse
  momentum-dependent observables

We propose a novel strategy for the perturbative resummation of transverse
momentum-dependent (TMD) observables, using the $q_T$ spectra of gauge bosons
($\gamma^*$, Higgs) in $pp$ collisions in the regime of low (but perturbative)
transverse momentum $q_T$ as a specific example. First we introduce a scheme to
choose the factorization scale for virtuality in momentum space instead of in
impact parameter space, allowing us to avoid integrating over (or cutting off)
a Landau pole in the inverse Fourier transform of the latter to the former. The
factorization scale for rapidity is still chosen as a function of impact
parameter $b$, but in such a way designed to obtain a Gaussian form (in $\ln
b$) for the exponentiated rapidity evolution kernel, guaranteeing convergence
of the $b$ integral. We then apply this scheme to obtain the $q_T$ spectra for
Drell-Yan and Higgs production at NNLL accuracy. In addition, using this scheme
we are able to obtain a fast semi-analytic formula for the perturbative
resummed cross sections in momentum space: analytic in its dependence on all
physical variables at each order of logarithmic accuracy, up to a numerical
expansion for the pure mathematical Bessel function in the inverse Fourier
transform that needs to be performed just once for all observables and
kinematics, to any desired accuracy.Comment: 60 pages + Appendices, 16 Figures v.2, Accepted in JHEP, discussion
  added on low-qT limit, other minor clarifications made and typos correcte
Dilepton and Four-Lepton Signals at the LHC in the Littlest Higgs Model
  with T-parity Violation

In the presence of the T-parity violating Wess-Zumino-Witten (WZW) anomaly
term, the otherwise stable heavy photon A_H in the Littlest Higgs model with
T-parity (LHT) decays to either Standard Model (SM) gauge boson pairs, or to SM
fermions via loop diagrams. We make a detailed study of the collider signatures
where the A_H can be reconstructed from invariant mass peaks in the opposite
sign same flavor dilepton or the four-lepton channels. This enables us to
obtain information about the fundamental symmetry breaking scale f in the LHT
and thereby the low-lying mass spectrum of the theory. In addition, indication
of the presence of the WZW term gives us hints of the possible UV completion of
the LHT via strong dynamics. The crucial observation is that the sum of all
production processes of heavy T-odd quark pairs has a sizeable cross-section at
the LHC and these T-odd particles eventually all cascade decay down to the
heavy photon A_H. We show that for certain regions of the parameter space with
either a small f of around 500 GeV or relatively light T-odd quarks with a mass
of around 400 GeV, one can reconstruct the A_H even at the early LHC run with
\sqrt{s}=10 TeV and a modest integrated luminosity of 200 pb^{-1}. At \sqrt{s}
= 14 TeV and with an integrated luminosity of 30 fb^{-1}, it is possible to
cover a large part of the typical parameter space of the LHT, with the scale f
up to 1.5 TeV and with T-odd quark masses almost up to 1 TeV. In this region of
the parameter space, the mass of the reconstructed A_H ranges from 66 GeV to
230 GeV.Comment: 35 pages, 4 figures; v2: additional multiple hard jets included in
  background simulation using ALPGEN, main conclusions unchanged, references
  added, version as published in JHEP
Real-time correlators in Kerr/CFT correspondence

We study real-time correlators in the Kerr/CFT correspondence. The
near-horizon geometry of extreme and near-extremal Kerr black holes can be
taken as warped spacetimes with the warping factors depending on the transverse
radius and the angular variable. By considering the Kerr/CFT correspondence as
a generalized warped AdS/CFT correspondence, we show how to compute the CFT
real-time correlation functions. We find that the retarded Green's functions,
the cross sections and the quasi-normal modes are all in perfect match with the
predictions of the dual CFT. The same analysis is also generalized to the
charged Newman-Kerr black holes .Comment: 21 pages; v3: typo in name correcte
Non-Global Logarithms in Filtered Jet Algorithms

We analytically and numerically study the effect of perturbative gluons
emission on the "Filtering analysis", which is part of a subjet analysis
procedure proposed two years ago to possibly identify a low-mass Higgs boson
decaying into b\bar{b} at the LHC. This leads us to examine the non-global
structure of the resulting perturbative series in the leading single-log
large-N_c approximation, including all-orders numerical results, simple
analytical approximations to them and comments on the structure of their series
expansion. We then use these results to semi-analytically optimize the
parameters of the Filtering analysis so as to suppress as much as possible the
effect of underlying event and pile-up on the Higgs mass peak reconstruction
while keeping the major part of the perturbative radiation from the b\bar{b}
dipole.Comment: 47 pages, 25 figures, 1 figure and a few comments added, version
  accepted for publication in JHE
W boson production at hadron colliders: the lepton charge asymmetry in
  NNLO QCD

We consider the production of W bosons in hadron collisions, and the
subsequent leptonic decay W->lnu_l. We study the asymmetry between the rapidity
distributions of the charged leptons, and we present its computation up to the
next-to-next-to-leading order (NNLO) in QCD perturbation theory. Our
calculation includes the dependence on the lepton kinematical cuts that are
necessarily applied to select W-> lnu_l events in actual experimental analyses
at hadron colliders. We illustrate the main differences between the W and
lepton charge asymmetry, and we discuss their physical origin and the effect of
the QCD radiative corrections. We show detailed numerical results on the charge
asymmetry in ppbar collisions at the Tevatron, and we discuss the comparison
with some of the available data. Some illustrative results on the lepton charge
asymmetry in pp collisions at LHC energies are presented.Comment: 37 pages, 21 figure
Hard thermal loops for soft or collinear external momenta

We consider finite temperature 1-loop diagrams with hard loop momenta and an
arbitrary number of external gauge fields when the external momenta are either
soft, or near the light cone and nearly collinear with the loop momentum. We
obtain a recursion relation for these diagrams which we translate into an
equation for their generating functional. By integrating out the soft fields
while keeping two collinear ones we find an integral equation, originally due
to Arnold, Moore, and Yaffe, which sums the bremsstrahlung and pair
annihilation contribution to the thermal photon production rate.Comment: 17 pages, title corrected, clarifying paragraph added to the
  appendix, version to appear in JHE
Light inflaton Hunter's Guide

We study the phenomenology of a realistic version of the chaotic inflationary
model, which can be fully and directly explored in particle physics
experiments. The inflaton mixes with the Standard Model Higgs boson via the
scalar potential, and no additional scales above the electroweak scale are
present in the model. The inflaton-to-Higgs coupling is responsible for both
reheating in the Early Universe and the inflaton production in particle
collisions. We find the allowed range of the light inflaton mass, 270
MeV<~m_chi<~1.8 GeV, and discuss the ways to find the inflaton. The most
promising are two-body kaon and B-meson decays with branching ratios of orders
10^{-9} and 10^{-6}, respectively. The inflaton is unstable with the lifetime
10^{-9}--10^{-10} s. The inflaton decays can be searched for in a beam-target
experiment, where, depending on the inflaton mass, from several billions to
several tenths of millions inflatons can be produced per year with modern
high-intensity beams.Comment: 21 page, 6 figures. Updated to the journal versio
Back reaction, covariant anomaly and effective action

In the presence of back reaction, we first produce the one-loop corrections
for the event horizon and Hawking temperature of the Reissner-Nordstr\"om black
hole. Then, based on the covariant anomaly cancelation method and the effective
action technique, the modified expressions for the fluxes of gauge current and
energy momentum tensor, due to the effect of back reaction, are obtained. The
results are consistent with the Hawking fluxes of a (1+1)-dimensional blackbody
at the temperature with quantum corrections, thus confirming the robustness of
the covariant anomaly cancelation method and the effective action technique for
black holes with back reaction.Comment: 17 page
Analytic calculation of properties of holographic superconductors

We calculate analytically properties of holographic superconductors in the
probe limit. We analyze the range $1/2 < \Delta < 3$, where $\Delta$ is the
dimension of the operator that condenses. We obtain the critical temperature in
terms of a solution to a certain eigenvalue problem. Near the critical
temperature, we apply perturbation theory to determine the temperature
dependence of the condensate. In the low temperature limit we show that the
condensate diverges as $T^{-\Delta/3}$ for $\Delta < 3/2$ whereas it asymptotes
to a constant value for which we provide analytic estimates for $\Delta > 3/2$.
We also obtain the frequency dependence of the conductivity by solving
analytically the wave equation of electromagnetic perturbations. We show that
the real part of the DC conductivity behaves as $e^{-\Delta_g /T}$ and estimate
the gap $\Delta_g$ analytically. Our results are in good agreement with
numerical results.Comment: 13 pages, 7 figure
BKM Lie superalgebras from dyon spectra in Z_N-CHL orbifolds for
  composite N

We show that the generating function of electrically charged 1/2-BPS states
in N=4 supersymmetric Z_N-CHL orbifolds of the heterotic string on T^6 are
given by multiplicative eta-products. The eta-products are determined by the
cycle shape of the corresponding symplectic involution in the dual type II
picture. This enables us to complete the construction of the genus-two Siegel
modular forms due to David, Jatkar and Sen [arXiv:hep-th/0609109] for Z_N
orbifolds when N is non-prime. We study the Z_4 CHL orbifold in detail and show
that the associated Siegel modular forms, \Phi_3(Z) and \widetilde{\Phi}_3(Z),
are given by the square of the product of three even genus-two theta constants.
Extending work by us[arXiv:0807.4451] as well as Cheng and
Dabholkar[arXiv:0809.4258], we show that their `square roots' appear as the
denominator formulae of two distinct Borcherds-Kac-Moody (BKM) Lie
superalgebras. The BKM Lie superalgebra associated with the generating function
of 1/4-BPS states, i.e., \widetilde{\Phi}_3(Z) has a parabolic root system with
a light-like Weyl vector and the walls of its fundamental Weyl chamber are
mapped to the walls of marginal stability of the 1/4-BPS states.Comment: LaTeX, 44 pages, 2 figures (v2)Physical interpretation for a family
  of BKM Lie superalgebras provided; typos correcte
A Holographic Quantum Critical Point at Finite Magnetic Field and Finite
  Density

We analyze the phase diagram of N=4 supersymmetric Yang-Mills theory with
fundamental matter in the presence of a background magnetic field and nonzero
baryon number. We identify an isolated quantum critical point separating two
differently ordered finite density phases. The ingredients that give rise to
this transition are generic in a holographic setup, leading us to conjecture
that such critical points should be rather common. In this case, the quantum
phase transition is second order with mean-field exponents. We characterize the
neighborhood of the critical point at small temperatures and identify some
signatures of a new phase dominated by the critical point. We also identify the
line of transitions between the finite density and zero density phases. The
line is completely determined by the mass of the lightest charged quasiparticle
at zero density. Finally, we measure the magnetic susceptibility and find hints
of fermion condensation at large magnetic field.Comment: 29 pages, 8 figure
The Overall Coefficient of the Two-loop Superstring Amplitude Using Pure
  Spinors

Using the results recently obtained for computing integrals over
(non-minimal) pure spinor superspace, we compute the coefficient of the
massless two-loop four-point amplitude from first principles. Contrasting with
the mathematical difficulties in the RNS formalism where unknown normalizations
of chiral determinant formulae force the two-loop coefficient to be determined
only indirectly through factorization, the computation in the pure spinor
formalism can be smoothly carried out.Comment: 29 pages, harvmac TeX. v2: add reference
High Energy Behavior of a Six-Point R-Current Correlator in N=4
  Supersymmetric Yang-Mills Theory

We study the high energy limit of a six-point R-current correlator in N=4
supersymmetric Yang-Mills theory for finite N_c. We make use of the framework
of perturbative resummation of large logarithms of the energy. More
specifically, we apply the (extended) generalized leading logarithmic
approximation. We find that the same conformally invariant two-to-four gluon
vertex occurs as in non-supersymmetric Yang-Mills theory. As a new feature we
find a direct coupling of the four-gluon t-channel state to the R-current
impact factor.Comment: 47 page
Massive Quantum Liquids from Holographic Angel's Trumpets

We explore the small-temperature regime in the deconfined phase of massive
fundamental matter at finite baryon number density coupled to the 3+1
dimensional N=4 SYM theory. In this setting, we can demonstrate a new type of
non-trivial temperature-independent scaling solutions for the probe brane
embeddings. Focusing mostly on matter supported in 2+1 dimensions, the
thermodynamics indicate that there is a quantum liquid with interesting
density-dependent low-temperature physics. We also comment about 3+1 and 1+1
dimensional systems, where we further find for example a new thermodynamic
instability.Comment: 18+1 pages, 6 figures; replaced fig. 6 and comments in sec. 5.2;
  minor explanations added and typos fixed, final version published in JHEP
  (modulo fig. 3); factor of \sqrt{\lambda} and corresponding comments fixe
U(N|M) quantum mechanics on Kaehler manifolds

We study the extended supersymmetric quantum mechanics, with supercharges
transforming in the fundamental representation of U(N|M), as realized in
certain one-dimensional nonlinear sigma models with Kaehler manifolds as target
space. We discuss the symmetry algebra characterizing these models and, using
operatorial methods, compute the heat kernel in the limit of short propagation
time. These models are relevant for studying the quantum properties of a
certain class of higher spin field equations in first quantization.Comment: 21 pages, a reference adde
Spontaneous R-parity violating type III seesaw

We present a model where neutrino masses are generated by a combination of
spontaneous R-parity violation and Type III seesaw. In addition to the usual
MSSM particle content, our model consists of one extra triplet matter chiral
superfield containing heavy SU(2) triplet fermions and its superpartners.
R-parity is broken spontaneously when the sneutrinos associated with the one
heavy neutrino as well as the three light neutrinos get vacuum expectation
values, giving rise to the mixed $8\times 8$ neutralino-neutrino mass matrix.
We show that our model can comfortably explain all the existing neutrino
oscillation data. Due to the presence of the triplet fermion, we have a pair of
additional heavy charged leptons which mix with the standard model charged
leptons and the charginos. This gives rise to a $6\times 6$ chargino-charged
lepton mass matrix, with 6 massive eigenstates. Finally we discuss about the
different R-parity violating possible decay modes and the distinctive collider
signatures which our model offers.Comment: 26 page
Noncommutative geometry inspired black holes in higher dimensions at the
  LHC

When embedding models of noncommutative geometry inspired black holes into
the peridium of large extra dimensions, it is natural to relate the
noncommutativity scale to the higher-dimensional Planck scale. If the Planck
scale is of the order of a TeV, noncommutative geometry inspired black holes
could become accessible to experiments. In this paper, we present a detailed
phenomenological study of the production and decay of these black holes at the
Large Hadron Collider (LHC). Noncommutative inspired black holes are relatively
cold and can be well described by the microcanonical ensemble during their
entire decay. One of the main consequences of the model is the existence of a
black hole remnant. The mass of the black hole remnant increases with
decreasing mass scale associated with noncommutative and decreasing number of
dimensions. The experimental signatures could be quite different from previous
studies of black holes and remnants at the LHC since the mass of the remnant
could be well above the Planck scale. Although the black hole remnant can be
very heavy, and perhaps even charged, it could result in very little activity
in the central detectors of the LHC experiments, when compared to the usual
anticipated black hole signatures. If this type of noncommutative inspired
black hole can be produced and detected, it would result in an additional mass
threshold above the Planck scale at which new physics occurs.Comment: 21 pages, 7 figure
An Exact Fluctuating 1/2-BPS Configuration

This work explores the role of thermodynamic fluctuations in the two
parameter giant and superstar configurations characterized by an ensemble of
arbitrary liquid droplets or irregular shaped fuzzballs. Our analysis
illustrates that the chemical and state-space geometric descriptions exhibit an
intriguing set of exact pair correction functions and the global correlation
lengths. The first principle of statistical mechanics shows that the possible
canonical fluctuations may precisely be ascertained without any approximation.
Interestingly, our intrinsic geometric study exemplifies that there exist exact
fluctuating 1/2-BPS statistical configurations which involve an ensemble of
microstates describing the liquid droplets or fuzzballs. The Gaussian
fluctuations over an equilibrium chemical and state-space configurations
accomplish a well-defined, non-degenerate, curved and regular intrinsic
Riemannian manifolds for all physically admissible domains of black hole
parameters. An explicit computation demonstrates that the underlying chemical
correlations involve ordinary summations, whilst the state-space correlations
may simply be depicted by standard polygamma functions. Our construction
ascribes definite stability character to the canonical energy fluctuations and
to the counting entropy associated with an arbitrary choice of excited boxes
from an ensemble of ample boxes constituting a variety of Young tableaux.Comment: Minor changes, added references, 30 pages, 4 figures, PACS numbers:
  04.70.-s: Physics of black holes; 04.70.-Bw: Classical black holes; 04.50.Gh
  Higher-dimensional black holes, black strings, and related objects; 04.60.Cf
  Gravitational aspects of string theory, accepted for publication in JHE
Dark matter and Higgs phenomenology predicted by left-right twin Higgs
  model in light of CDMS II results

The left-right twin Higgs model predicts a light stable scalar \hat{S}, which
is a candidate for WIMP dark matter. We study its scattering on nucleon and
find that the cross section is below the CDMS II upper bound but can reach the
SuperCDMS sensitivity. Then we study the Higgs phenomenology by paying special
attention to the decay h -> \hat{S} \hat{S} which is strongly correlated with
the dark matter scattering on nucleon. We find that such an invisible decay can
be sizable, which can severely suppress the conventional decay modes like h->VV
(V=W,Z) and h->b\bar{b}. On the other hand, compared to the SM prediction, the
rates of Higgs boson productions at the LHC via gluon-gluon fusion, weak boson
fusion or in association with top quark pairs are all reduced significantly,
e.g., the gluon-gluon fusion channel can be suppressed by about 30%.Comment: Version in JHEP (discussions and refs added
Lepton flavour violation in the MSSM

We derive new constraints on the quantities delta_{XY}^{ij}, X,Y=L,R, which
parametrise the flavour-off-diagonal terms of the charged slepton mass matrix
in the MSSM. Considering mass and anomalous magnetic moment of the electron we
obtain the bound |delta^{13}_{LL} delta^{13}_{RR}|<0.1 for tan beta=50, which
involves the poorly constrained element delta^{13}_{RR}. We improve the
predictions for the decays tau -> mu gamma, tau -> e gamma and mu -> e gamma by
including two-loop corrections which are enhanced if tan beta is large. The
finite renormalisation of the PMNS matrix from soft SUSY-breaking terms is
derived and applied to the charged-Higgs-lepton vertex. We find that the
experimental bound on BR(tau -> e gamma) severely limits the size of the MSSM
loop correction to the PMNS element U_{e3}, which is important for the proper
interpretation of a future U_{e3} measurement. Subsequently we confront our new
values for delta^{ij}_{LL} with a GUT analysis. Further, we include the effects
of dimension-5 Yukawa terms, which are needed to fix the Yukawa unification of
the first two generations. If universal supersymmetry breaking occurs above the
GUT scale, we find the flavour structure of the dimension-5 Yukawa couplings
tightly constrained by mu -> e gamma.Comment: 37 pages, 15 figures; typo in Equation (35) and (49) correcte
A Twist in the Dyon Partition Function

In four dimensional string theories with N=4 and N=8 supersymmetries one can
often define twisted index in a subspace of the moduli space which captures
additional information on the partition function than the ones contained in the
usual helicity trace index. We compute several such indices in type IIB string
theory on K3 x T^2 and T^6, and find that they share many properties with the
usual helicity trace index that captures the spectrum of quarter BPS states in
N=4 supersymmetric string theories. In particular the partition function is a
modular form of a subgroup of Sp(2,Z) and the jumps across the walls of
marginal stability are controlled by the residues at the poles of the partition
function. However for large charges the logarithm of this index grows as 1/n
times the entropy of a black hole carrying the same charges where n is the
order of the symmetry generator that is used to define the twisted index. We
provide a macroscopic explanation of this phenomenon using quantum entropy
function formalism. The leading saddle point corresponding to the attractor
geometry fails to contribute to the twisted index, but a Z_n orbifold of the
attractor geometry produces the desired contribution.Comment: LaTeX file, 35 pages; v2: references adde
Lepton Flavor Violation in Models with $A_4$ and $S_4$ Flavor Symmetries

The lepton flavor violation $\mu\to e\gamma$, $\tau\to e\gamma$,
$\tau\to\mu\gamma$, $\mu\to3e$, $\tau\to3e$, $\tau\to3\mu$ and $\mu-e$
conversion in Al and Ti are studied in both the Altarelli-Feruglio $A_4$ model
and the $S_4$ model of Ding. The rates of these lepton flavor violation process
for the inverted hierarchy neutrino mass spectrum are enhanced considerably by
the next to leading order contributions. For both models, we find that the
$\mu-e$ conversion in Ti is within the precision of next generation experiments
in all the parameter space considered, the $\mu-e$ conversion in Al should be
observable at least in a very significant part of the parameter space, whereas
$\tau\to e\gamma$, $\tau\to\mu\gamma$, $\tau\to3e$ and $\tau\to3\mu$ are below
the expected future sensitivity. The detectability of $\mu\to e\gamma$ and
$\mu\to3e$ in near future depends on the models and the neutrino mass spectrum.
We suggest that a comprehensive consideration of the lepton flavor violation
processes is important to test and distinguish both discrete flavor symmetry
models.Comment: 30 pages, 13 figure