pinecone/core-2020-05-10-deduplication huggingface dataset:
Effects of TMD evolution and partonic flavor on $e^+e^-$ annihilation
  into hadrons

We calculate the transverse momentum dependence in the production of two
back-to-back hadrons in electron-positron annihilations at the medium/large
energy scales of BES-III and BELLE experiments. We use the parameters of the
transverse-momentum-dependent (TMD) fragmentation functions that were recently
extracted from the semi-inclusive deep-inelastic-scattering multiplicities at
low energy from HERMES. TMD evolution is applied according to different
approaches and using different parameters for the nonperturbative part of the
evolution kernel, thus exploring the sensitivity of our results to these
different choices and to the flavor dependence of parton fragmentation
functions. We discuss how experimental measurements could discriminate among
the various scenarios.Comment: 33 pages, 10 composite figures, JHEP style fil
Electroweak relaxation from finite temperature

We study theories which naturally select a vacuum with parametrically small
Electroweak Scale due to finite temperature effects in the early universe. In
particular, there is a scalar with an approximate shift symmetry broken by a
technically natural small coupling to the Higgs, and a temperature dependent
potential. As the temperature of the universe drops, the scalar follows the
minimum of its potential altering the Higgs mass squared parameter. The scalar
also has a periodic potential with amplitude proportional to the Higgs
expectation value, which traps it in a vacuum with a small Electroweak Scale.
The required temperature dependence of the potential can occur through strong
coupling effects in a hidden sector that are suppressed at high temperatures.
Alternatively, it can be generated perturbatively from a one-loop thermal
potential. In both cases, for the scalar to be displaced, a hidden sector must
be reheated to temperatures significantly higher than the visible sector.
However this does not violate observational constraints provided the hidden
sector energy density is transferred to the visible sector without disrupting
big bang nucleosynthesis. We also study how the mechanism can be implemented
when the visible sector is completed to the Minimal Supersymmetric Standard
Model at a high scale. Models with a UV cutoff of 10 TeV and no fields taking
values over a range greater than 10^12 GeV are possible, although the scalar
must have a range of order 10^8 times the effective decay constant in the
periodic part of its potential.Comment: 17 pages, 1 figure, JHEP versio
Lefschetz thimble structure in one-dimensional lattice Thirring model at
  finite density

We investigate Lefschetz thimble structure of the complexified
path-integration in the one-dimensional lattice massive Thirring model with
finite chemical potential. The lattice model is formulated with staggered
fermions and a compact auxiliary vector boson (a link field), and the whole set
of the critical points (the complex saddle points) are sorted out, where each
critical point turns out to be in a one-to-one correspondence with a singular
point of the effective action (or a zero point of the fermion determinant). For
a subset of critical point solutions in the uniform-field subspace, we examine
the upward and downward cycles and the Stokes phenomenon with varying the
chemical potential, and we identify the intersection numbers to determine the
thimbles contributing to the path-integration of the partition function. We
show that the original integration path becomes equivalent to a single
Lefschetz thimble at small and large chemical potentials, while in the
crossover region multi thimbles must contribute to the path integration.
Finally, reducing the model to a uniform field space, we study the relative
importance of multiple thimble contributions and their behavior toward
continuum and low-temperature limits quantitatively, and see how the rapid
crossover behavior is recovered by adding the multi thimble contributions at
low temperatures. Those findings will be useful for performing Monte-Carlo
simulations on the Lefschetz thimbles.Comment: 32 pages, 14 figures (typo etc. corrected
Strong IR Cancellation in Heavy Quarkonium and Precise Top Mass
  Determination

Combining recent perturbative analyses on the static QCD potential and the
quark pole mass, we find that, for the heavy quarkonium states $c\bar{c}$,
$b\bar{b}$ and $t\bar{t}$, (1) ultra-soft (US) corrections in the binding
energies are small, and (2) there is a stronger cancellation of IR
contributions than what has been predicted by renormalon dominance hypothesis.
By contrast, for a hypothetical heavy quarkonium system with a small number of
active quark flavors ($n_l\approx 0$), we observe evidence that renormalon
dominance holds accurately and that non-negligible contributions from US
corrections exist. In addition, we examine contributions of renormalons at $u=-
1$. As an important consequence, we improve on a previous prediction for
possible achievable accuracy of top quark $\overline{\rm MS}$--mass measurement
at a future linear collider and estimate that in principle 20--30~MeV accuracy
is reachable.Comment: 17 pages, 7 figures, 3 tables; Revisions in ver.2: We added (i) a
  more conservative error estimate of m_t determination, (ii) discussion on
  u=+1 and u=-1 renormalons, (iii) interpretation of PS-schem
Nucleon Electric Dipole Moments in High-Scale Supersymmetric Models

The electric dipole moments (EDMs) of electron and nucleons are promising
probes of the new physics. In generic high-scale supersymmetric (SUSY)
scenarios such as models based on mixture of the anomaly and gauge mediations,
gluino has an additional contribution to the nucleon EDMs. In this paper, we
studied the effect of the $CP$-violating gluon Weinberg operator induced by the
gluino chromoelectric dipole moment in the high-scale SUSY scenarios, and we
evaluated the nucleon and electron EDMs in the scenarios. We found that in the
generic high-scale SUSY models, the nucleon EDMs may receive the sizable
contribution from the Weinberg operator. Thus, it is important to compare the
nucleon EDMs with the electron one in order to discriminate among the
high-scale SUSY models.Comment: 22 pages, 8 figures, Version accepted for publication in JHE
Spectral zeta function and non-perturbative effects in ABJM Fermi-gas

The exact partition function in ABJM theory on three-sphere can be regarded
as a canonical partition function of a non-interacting Fermi-gas with an
unconventional Hamiltonian. All the information on the partition function is
encoded in the discrete spectrum of this Hamiltonian. We explain how (quantum
mechanical) non-perturbative corrections in the Fermi-gas system appear from a
spectral consideration. Basic tools in our analysis are a Mellin-Barnes type
integral representation and a spectral zeta function. From a consistency with
known results, we conjecture that the spectral zeta function in the ABJM
Fermi-gas has an infinite number of "non-perturbative" poles, which are
invisible in the semi-classical expansion of the Planck constant. We observe
that these poles indeed appear after summing up perturbative corrections. As a
consequence, the perturbative resummation of the spectral zeta function causes
non-perturbative corrections to the grand canonical partition function. We also
present another example associated with a spectral problem in topological
string theory. A conjectured non-perturbative free energy on the resolved
conifold is successfully reproduced in this framework.Comment: 32 pages, 4 figures, v2: published versio
Finite coupling corrections to holographic predictions for hot QCD

Finite 't Hooft coupling corrections to multiple physical observables in
strongly coupled $N=4$ supersymmetric Yang-Mills plasma are examined, in an
attempt to assess the stability of the expansion in inverse powers of the 't
Hooft coupling $\lambda$. Observables considered include thermodynamic
quantities, transport coefficients, and quasinormal mode frequencies. Although
large $\lambda$ expansions for quasinormal mode frequencies are notably less
well behaved than the expansions of other quantities, we find that a partial
resummation of higher order corrections can significantly reduce the
sensitivity of the results to the value of $\lambda$.Comment: 22 pages, typos fixed, numerics improve
ABJM Amplitudes in U-gauge and a Soft Theorem

We report progress in computing and analyzing all tree amplitudes in ABJM
theory. Inspired by the isomorphism between the orthogonal Grassmannian and the
pure spinor geometries, we adopt a new gauge, called u-gauge, for evaluating
the orthogonal Grassmannian integral for ABJM amplitudes. We carry out the
integral explicitly for the 8-point amplitude and obtain the complete
supersymmetric amplitude. The physical and spurious poles arise from the
integral as expected from on-shell diagrams. We also derive a double scalar
soft theorem of ABJM amplitudes and verify it for known amplitudes.Comment: 35 pages, 6 figures; v2. minor correction
Quantum Entanglement at High Temperatures? II. Bosonic Systems in
  Nonequilibrium Steady State

This is the second of a series of three papers examining how viable it is for
entanglement to be sustained at high temperatures for quantum systems in
thermal equilibrium (Case A), in nonequilibrium (Case B) and in nonequilibrium
steady state conditions (Case C). The system we analyze here consists of two
coupled quantum harmonic oscillators each interacting with its own bath
described by a scalar field, set at temperatures $T_1 > T_2$. For
\textit{constant bilinear inter-oscillator coupling} studied here (Case C1)
owing to the Gaussian nature, the problem can be solved exactly at arbitrary
temperatures even for strong coupling. We find that the valid entanglement
criterion in general is not a function of the bath temperature difference, in
contrast to thermal transport in the same NESS setting [1]. Thus lowering the
temperature of one of the thermal baths does not necessarily help to safeguard
the entanglement between the oscillators. Indeed, quantum entanglement will
disappear if any one of the thermal baths has a temperature higher than the
critical temperature $T_c$. With the Langevin equations derived we give a full
display of how entanglement dynamics in this system depends on $T_{1}$, $T_{2}$
, the inter-oscillator coupling and the system-bath coupling strengths. For
weak oscillator-bath coupling the critical temperature $T_c$ is about the order
of the inverse oscillator frequency, but for strong oscillator-bath coupling it
will depend on the bath cutoff frequency. We conclude that in most realistic
circumstances, for bosonic systems in NESS with constant bilinear coupling,
`hot entanglement' is largely a fiction. In Paper III we will examine the case
(C2) of \textit{time-dependent driven coupling } which contains the parametric
pumping type described in [2] wherein entanglement was first shown to sustain
at high temperatures.Comment: 47 pages, 9 figure
Long-lived bino and wino in supersymmetry with heavy scalars and
  higgsinos

We point out that there is a parameter region in supersymmetry with heavy
scalars and higgsinos, in which the heavier of bino and wino becomes long-lived
as a consequence of the heavy higgsinos. In this region these electroweak
gaugino sectors are secluded from each other with very small mixings that are
inversely proportional to the higgsino mass. We revisit the bino and bino
decays and provide simple formulae for the partial decay rates and the
lifetimes in the limit of heavy higgsinos. We discuss the collider signatures
of the long-lived binos and winos in this scenario.Comment: 23 pages, 9 figures, text clarified, additional formulas, comparison
  with SDecay; to appear in JHE
Vacuum currents in braneworlds on AdS bulk with compact dimensions

The two-point function and VEV of the current density are investigated for a
massive charged scalar field with arbitrary curvature coupling in the geometry
of a brane on background of AdS spacetime with partial toroidal
compactification.The presence of a gauge field flux enclosed by compact
dimensions is assumed.On the brane the field obeys Robin boundary condition and
along compact dimensions periodicity conditions with general phases are
imposed.There is a range in the space of values for the coefficient in the
boundary condition where Poincare vacuum is unstable.This range depends on the
brane location.In models with compact dimensions the stability condition is
less restrictive than for AdS bulk with trivial topology.Vacuum charge density
and components of current along non-compact dimensions vanish. VEV of the
current density along compact dimensions is a periodic function of the gauge
field flux with a period equal to the flux quantum.It is decomposed into the
boundary-free and brane-induced contributions.The asymptotic behavior of the
latter is investigated near the brane, AdS boundary and horizon.In contrast to
VEVs of the field squared and energy-momentum tensor, current density is finite
on brane and vanishes for the special case of Dirichlet boundary condition.Both
boundary-free and brane-induced contributions vanish on AdS
boundary.Brane-induced contribution vanishes on the horizon and for points near
the horizon the current is dominated by the boundary-free part.In the
near-horizon limit, the latter is connected to the corresponding quantity for a
massless field in the Minkowski bulk by a simple conformal relation.Depending
on the value of the Robin coefficient, the presence of the brane can either
increase or decrease the vacuum currents. Applications are given for a
higher-dimensional version of the Randall-Sundrum 1-brane modelComment: 30 pages, 8 figures, PACS numbers: 04.62.+v, 04.50.-h, 11.10.Kk,
  11.25.-
Wilson surface observables from equivariant cohomology

Wilson lines in gauge theories admit several path integral descriptions. The
first one (due to Alekseev-Faddeev-Shatashvili) uses path integrals over
coadjoint orbits. The second one (due to Diakonov-Petrov) replaces a
1-dimensional path integral with a 2-dimensional topological $\sigma$-model. We
show that this $\sigma$-model is defined by the equivariant extension of the
Kirillov symplectic form on the coadjoint orbit. This allows to define the
corresponding observable on arbitrary 2-dimensional surfaces, including closed
surfaces. We give a new path integral presentation of Wilson lines in terms of
Poisson $\sigma$-models, and we test this presentation in the framework of the
2-dimensional Yang-Mills theory. On a closed surface, our Wilson surface
observable turns out to be nontrivial for $G$ non-simply connected (and trivial
for $G$ simply connected), in particular we study in detail the cases $G=U(1)$
and $G=SO(3)$.Comment: 22 page
Solutions to the reconstruction problem in asymptotic safety

Starting from a full renormalised trajectory for the effective average action
(a.k.a. infrared cutoff Legendre effective action) $\Gamma_k$, we explicitly
reconstruct corresponding bare actions, formulated in one of two ways. The
first step is to construct the corresponding Wilsonian effective action $S^k$
through a tree-level expansion in terms of the vertices provided by $\Gamma_k$.
It forms a perfect bare action giving the same renormalised trajectory. A bare
action with some ultraviolet cutoff scale $\Lambda$ and infrared cutoff $k$
necessarily produces an effective average action $\Gamma^\Lambda_k$ that
depends on both cutoffs, but if the already computed $S^\Lambda$ is used, we
show how $\Gamma^\Lambda_k$ can also be computed from $\Gamma_k$ by a
tree-level expansion, and that $\Gamma^\Lambda_k\to\Gamma_k$ as
$\Lambda\to\infty$. Along the way we show that Legendre effective actions with
different UV cutoff profiles, but which correspond to the same Wilsonian
effective action, are related through tree-level expansions. All these
expansions follow from Legendre transform relationships that can be derived
from the original one between $\Gamma^\Lambda_k$ and $S^k$.Comment: 32 page
Beta Function of k Deformed AdS_5 x S^5 String Theory

We calculate the one loop beta function for the would-be marginal coupling on
the world sheet of the k deformed sigma models associated to a quantum group
with q=exp(i pi/k). This includes the bosonic principal chiral models and
symmetric space sigma models but also the k deformed semi-symmetric space sigma
model describing strings in a deformation of AdS_5 x S^5. The world sheet sigma
model is a current-current deformation of the gauged WZW model for the
supergroup PSU(2,2|4) with level k. In the string theory context the beta
function is shown to vanish because of the vanishing of the Killing form of
PSU(2,2|4) which is another piece of evidence that the k deformed theories
define consistent string theories.Comment: 26 pages, some typos correcte
Finite Volume for Three-Flavour Partially Quenched Chiral Perturbation
  Theory through NNLO in the Meson Sector

We present a calculation of the finite volume corrections to meson masses and
decay constants in three flavour Partially Quenched Chiral Perturbation Theory
(PQChPT) through two-loop order in the chiral expansion for the flavour-charged
(or off-diagonal) pseudoscalar mesons. The analytical results are obtained for
three sea quark flavours with one, two or three different masses. We reproduce
the known infinite volume results and the finite volume results in the
unquenched case. The calculation has been performed using the supersymmetric
formulation of PQChPT as well as with a quark-flow technique.
  Partial analytical results can be found in the appendices. Some examples of
cases relevant to lattice QCD are studied numerically. Numerical programs for
all results are available as part of the CHIRON package.Comment: 29 page
Gravity with a cosmological constant from rational curves

We give a new formula for all tree-level correlators of boundary field
insertions in gauged N=8 supergravity in AdS_4; this is an analog of the
tree-level S-matrix in anti-de Sitter space. The formula is written in terms of
rational maps from the Riemann sphere to twistor space, with no reference to
bulk perturbation theory. It is polynomial in the cosmological constant, and
equal to the classical scattering amplitudes of supergravity in the flat space
limit. The formula is manifestly supersymmetric, independent of gauge choices
on twistor space, and equivalent to expressions computed via perturbation
theory at 3-point MHV-bar and n-point MHV. We also show that the formula
factorizes and obeys BCFW recursion in twistor space.Comment: 19 pages, no figures. v2: minor improvements, published versio
LHC $\tau$-rich Tests of Lepton-specific 2HDM for $(g-2)_\mu$

The lepton-sepcific (or type X) 2HDM (L2HDM) is an attractive new physics
candidate explaining the muon $g-2$ anomaly requiring a light CP-odd boson $A$
and large $\tan\beta$. This scenario leads to $\tau$-rich signatures, such as
$3\tau$, $4\tau$ and $4\tau+W/Z$, which can be readily accessible at the LHC.
We first study the whole L2HDM parameter space to identify allowed regions of
extra Higgs boson masses as well as two couplings $\lambda_{hAA}$ and $\xi_h^l$
which determine the 125 GeV Higgs boson decays $h\to \tau^+\tau^-$ and $h\to
AA/AA^*(\tau^+\tau^-)$, respectively. This motivates us to set up two regions
of interest: (A) $m_A \ll m_{H} \sim m_{H^\pm}$, and (B) $m_A \sim m_{H^\pm}
\sim {\cal O}(100) \mbox{GeV} \ll m_H$, for which derive the current
constraints by adopting the chargino-neutralino search at the LHC8, and then
analyze the LHC14 prospects by implementing $\tau$-tagging algorithm. A
correlated study of the upcoming precision determination of the 125 GeV Higgs
boson decay properties as well as the observation of multi-tau events at the
next runs of LHC will be able to shed light on the L2HDM option for the muon
$g-2$.Comment: 21 pages, 9 figure
Large spin systematics in CFT

Using conformal field theory (CFT) arguments we derive an infinite number of
constraints on the large spin expansion of the anomalous dimensions and
structure constants of higher spin operators. These arguments rely only on
analiticity, unitarity, crossing-symmetry and the structure of the conformal
partial wave expansion. We obtain results for both, perturbative CFT to all
order in the perturbation parameter, as well as non-perturbatively. For the
case of conformal gauge theories this provides a proof of the reciprocity
principle to all orders in perturbation theory and provides a new "reciprocity"
principle for structure constants. We argue that these results extend also to
non-conformal theories.Comment: 20 pages; v2: version published in JHE
Forward production of $\Upsilon$ mesons in $pp$ collisions at
  $\sqrt{s}=7$ and 8TeV

The production of $\Upsilon$ mesons in $pp$ collisions at $\sqrt=7$ and
$8\,\mathrm{TeV}$ is studied with the LHCb detector using data samples
corresponding to an integrated luminosity of $1\,\mathrm{fb}^{-1}$ and
$2\,\mathrm{fb}^{-1}$ respectively. The production cross-sections and ratios of
cross-sections are measured as functions of the meson transverse momentum $p_T$
and rapidity $y$, for $p_T<30\,\mathrm{GeV}/c$} and $2.0<y<4.5$.Comment: 36 pages, 7 figures, 16 tables. All figures and tables, along with
  any supplementary material and additional information, are available at
  https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2015-045.htm
Higher Spins and Matter Interacting in Dimension Three

The spectrum of Prokushkin--Vasiliev Theory is puzzling in light of the
Gaberdiel--Gopakumar conjecture because it generically contains an additional
sector besides higher-spin gauge and scalar fields. We find the unique
truncation of the theory avoiding this problem to order 2 in perturbations
around AdS$_3$. The second-order backreaction on the physical gauge sector
induced by the scalars is computed explicitly. The cubic action for the
physical fields is determined completely. We comment on a different higher-spin
theory without such additional fields at $\lambda=1$.Comment: 55 pages + appendices, LaTex. Final version to appear in JHE
The Compton-Schwarzschild correspondence from extended de Broglie
  relations

The Compton wavelength gives the minimum radius within which the mass of a
particle may be localized due to quantum effects, while the Schwarzschild
radius gives the maximum radius within which the mass of a black hole may be
localized due to classial gravity. In a mass-radius diagram, the two lines
intersect near the Planck point $(l_P,m_P)$, where quantum gravity effects
become significant. Since canonical (non-gravitational) quantum mechanics is
based on the concept of wave-particle duality, encapsulated in the de Broglie
relations, these relations should break down near $(l_P,m_P)$. It is unclear
what physical interpretation can be given to quantum particles with energy $E
\gg m_Pc^2 $, since they correspond to wavelengths $\lambda \ll l_P$ or time
periods $T \ll t_P$ in the standard theory. We therefore propose a correction
to the standard de Broglie relations, which gives rise to a modified Schr{\"
o}dinger equation and a modified expression for the Compton wavelength, which
may be extended into the region $E \gg m_Pc^2$. For the proposed modification,
we recover the expression for the Schwarzschild radius for $E \gg m_Pc^2$ and
the usual Compton formula for $E \ll m_Pc^2$. The sign of the inequality
obtained from the uncertainty principle reverses at $m \approx m_P$, so that
the Compton wavelength and event horizon size may be interpreted as minimum and
maximum radii, respectively. We interpret the additional terms in the modified
de Broglie relations as representing the self-gravitation of the wave packet.Comment: 40 pages, 7 figures, 2 appendices. Published version, with additional
  minor typos corrected (v3