pinecone/core-2020-05-10-deduplication huggingface dataset:
Marginal Deformations and Rotating Horizons

Motivated by the near-horizon geometry of four-dimensional extremal black
holes, we study a disordered quantum mechanical system invariant under a global
$SU(2)$ symmetry. As in the Sachdev-Ye-Kitaev model, this system exhibits an
approximate $SL(2,\mathbb{R})$ symmetry at low energies, but also allows for a
continuous family of $SU(2)$ breaking marginal deformations. Beyond a certain
critical value for the marginal coupling, the model exhibits a quantum phase
transition from the gapless phase to a gapped one and we calculate the critical
exponents of this transition. We also show that charged, rotating extremal
black holes exhibit a transition when the angular velocity of the horizon is
tuned to a certain critical value. Where possible we draw parallels between the
disordered quantum mechanics and charged, rotating black holes.Comment: 29 pages, 5 figure
Flavor Gauge Models Below the Fermi Scale

The mass and weak interaction eigenstates for the quarks of the third
generation are very well aligned, an empirical fact for which the Standard
Model offers no explanation. We explore the possibility that this alignment is
due to an additional gauge symmetry in the third generation. Specifically, we
construct and analyze an explicit, renormalizable model with a gauge boson,
$X$, corresponding to the $B-L$ symmetry of the third family. Having a
relatively light (in the MeV to multi-GeV range), flavor-nonuniversal gauge
boson results in a variety of constraints from different sources. By
systematically analyzing 20 different constraints, we identify the most
sensitive probes: kaon, $B^+$, $D^+$ and Upsilon decays, $D-\bar{D}^0$ mixing,
atomic parity violation, and neutrino scattering and oscillations. For the new
gauge coupling $g_X$ in the range $(10^{-2} - 10^{-4})$ the model is shown to
be consistent with the data. Possible ways of testing the model in $b$ physics,
top and $Z$ decays, direct collider production and neutrino oscillation
experiments, where one can observe nonstandard matter effects, are outlined.
The choice of leptons to carry the new force is ambiguous, resulting in
additional phenomenological implications, such as non-universality in
semileptonic bottom decays. The proposed framework provides interesting
connections between neutrino oscillations, flavor and collider physics.Comment: 44 pages, 7 figures, 3 tables; B physics constraints and references
  added, conclusions unchange
High Energy Resummation of Jet Observables

In this paper we investigate the extension of high energy resummation at LLx
accuracy to jet observables. In particular, we present the high energy resummed
expression of the transverse momentum distribution of the outgoing parton in
the general partonic process $g(q) + g(q) \to g(q) + X$. In order to reach this
result, several new ideas are introduced and exploited. First we prove that LLx
resummation is achieved by dressing with hard radiation an off-shell gluon
initiated LO process even if its on-shell limit is vanishing or trivial. Then
we present a gauge-invariant framework where these calculations can be
performed by using the modern helicity techniques. Finally, we show a possible
way to restore gluon indistinguishability in the final state, which is
otherwise lost in the resummation procedure, at all orders in $\alpha_s$ at
LLx. All partonic channels are then resummed and cross-checked against
fixed-order calculations up to $\mathcal{O}(\alpha_s^3)$Comment: 31 pages, 6 figure
One-loop QCD thermodynamics in a strong homogeneous and static magnetic
  field

We have studied how the equation of state of thermal QCD with two light
flavours is modified in strong magnetic field by calculating the thermodynamic
observables of hot QCD matter up to one-loop, where the magnetic field affects
mainly the quark contribution and the gluonic part is largely unaffected except
for the softening of the screening mass due to the strong magnetic field. To
begin with the effect of magnetic field on the thermodynamics, we have first
calculated the pressure of a thermal QCD medium in strong magnetic field limit
(SML), where the pressure at fixed temperature increases with the magnetic
field faster than the increase with the temperature at constant magnetic field.
This can be envisaged from the dominant scale of thermal medium in SML, which
is the magnetic field, like the temperature in thermal medium in absence of
strong magnetic field. Thus although the presence of strong magnetic field
makes the pressure of hot QCD medium harder but the increase of pressure with
respect to the temperature becomes less steeper. Corroborated to the above
observations, the entropy density is found to decrease with the temperature in
the ambience of strong magnetic field which resonates with the fact that the
strong magnetic field restricts the dynamics of quarks in two dimensions, hence
the phase space gets squeezed resulting the reduction of number of microstates.
Moreover the energy density is seen to decrease and the speed of sound of
thermal QCD medium is increased in the presence of strong magnetic field. These
crucial findings in strong magnetic field could have phenomenological
implications in heavy ion collisions because the expansion dynamics of the
medium produced in noncentral ultrarelativistic heavy ion collisions is
effectively controlled by both the energy density and the speed of sound.Comment: 42 pages, 6 figures and 2 diagram
Impact of New Physics on the EW vacuum stability in a curved spacetime
  background

It has been recently shown that, contrary to an intuitive decoupling
argument, the presence of new physics at very large energy scales (say around
the Planck scale) can have a strong impact on the electroweak vacuum lifetime.
In particular, the vacuum could be totally destabilized. This study was
performed in a flat spacetime background, and it is important to extend the
analysis to curved spacetime since these are Planckian-physics effects. It is
generally expected that under these extreme conditions gravity should totally
quench the formation of true vacuum bubbles, thus washing out the destabilizing
effect of new physics. In this work we extend the analysis to curved spacetime
and show that, although gravity pushes toward stabilization, the destabilizing
effect of new physics is still (by far) the dominating one. In order to get
model independent results, high energy new physics is parametrized in two
different independent ways: as higher order operators in the Higgs field, or
introducing new particles with very large masses. The destabilizing effect is
observed in both cases, hinting at a general mechanism that does not depend on
the parametrization details for new physics, thus maintaining the results
obtained from the analysis performed in flat spacetime.Comment: 22 pages, 11 figure
A Type IIB Matrix Model via non-Abelian T-dualities

We construct a new solution of type IIB supergravity with eight supercharges
by applying non-Abelian T-duality to the $ AdS_5\times S^5$ solution, along the
$ SU(2)$ isometries in both the internal and Lorentz symmetries. The study of
quantised charges and D-brane embeddings suggests a configuration of D1 and
D3'-branes that polarise into concentric, spherical, D3 and D5-branes due to
the Myers dielectric effect. We find that our solution is dual to a IIB matrix
model with fuzzy sphere vacua characterised by partitions of the number of D1
and D3'-branes. We also study the solution obtained via (Abelian) T-dualities
along the $S^1$ fiber angles inside the $S^3$'s of the $ AdS_5\times S^5$
solution. In addition, we point out a precise relation between NATD and ATD
solutions by considering a double scaling limit in the NATD solutions. In the
particular case of the solutions obtained by a single (non-)Abelian T-duality
inside the Lorentz symmetries of the $AdS_5\times S^5$ solution, we demonstrate
that the double scaling limit provides a supergravity realisation of the
relations between the vacua of the half-BPS theories studied by Lin and
Maldacena.Comment: 20 pages, 1 figure, 1 tabl
A bound state model for a light scalar

Recent lattice studies of near-conformal strong dynamics suggest the
existence of a light scalar. This provides motivation to consider a simple
Hamiltonian-based bound-state model where the pseudoscalar, scalar, vector and
axial-vector states are treated on an equal footing. The model interpolates
between the non-relativistic limit and the highly relativistic chiral limit,
where the pseudoscalar mass drops to zero. The fermion mass becomes purely
dynamical at this point. When the gauge coupling is constant over a moderate
range of scales the scalar becomes significantly lighter than the spin 1 states
as the chiral limit is approached. We relate this result to the behavior of the
form factors of the respective states and their decay constants. In the
conformal limit of the model all masses vanish and the theory is characterized
by scaling dimensions.Comment: 14 pages, 8 figures, published versio
Non-Abelian Supertubes

A supertube is a supersymmetric configuration in string theory which occurs
when a pair of branes spontaneously polarizes and generates a new dipole charge
extended along a closed curve. The dipole charge of a codimension-2 supertube
is characterized by the U-duality monodromy as one goes around the supertube.
For multiple codimension-2 supertubes, their monodromies do not commute in
general. In this paper, we construct a supersymmetric solution of
five-dimensional supergravity that describes two supertubes with such
non-Abelian monodromies, in a certain perturbative expansion. In supergravity,
the monodromies are realized as the multi-valuedness of the scalar fields,
while in higher dimensions they correspond to non-geometric duality twists of
the internal space. The supertubes in our solution carry NS5 and 5$_2^2$ dipole
charges and exhibit the same monodromy structure as the SU(2) Seiberg-Witten
geometry. The perturbative solution has $\mathrm{AdS}_2\times S^2$ asymptotics
and vanishing four-dimensional angular momentum. We argue that this solution
represents a microstate of four-dimensional black holes with a finite horizon
and that it provides a clue for the gravity realization of a pure-Higgs branch
state in the dual quiver quantum mechanics.Comment: 47 pages + 12 pages, 5 figures; v2: references added, minor
  corrections; v3: minor modifications, JHEP published versio
Spontaneous $CP$ breaking in QCD and the axion potential: an effective
  Lagrangian approach

Using the well-known low-energy effective Lagrangian of QCD --valid for small
(non-vanishing) quark masses and a large number of colors-- we study in detail
the regions of parameter space where $CP$ is spontaneously broken/unbroken for
a vacuum angle $\theta= \pi$. In the $CP$-broken region there are first order
phase transitions as one crosses $\theta=\pi$, while on the (hyper)surface
separating the two regions, there are second order phase transitions signaled
by the vanishing of the mass of a pseudo Nambu-Goldstone boson and by a
divergent QCD topological susceptibility. The second order point sits at the
end of a first order line associated with the $CP$ spontaneous breaking, in the
appropriate complex parameter plane. When the effective Lagrangian is extended
by the inclusion of an axion these features of QCD imply that standard
calculations of the axion potential have to be revised when the QCD parameters
fall in the above mentioned $CP$-broken region, in spite of the fact that the
axion solves the strong-$CP$ problem. These latter results could be of interest
for axionic dark matter calculations if the topological susceptibility of pure
Yang-Mills theory falls off sufficiently fast when temperature is increased
towards the QCD deconfining transition.Comment: 36 pages, 10 figures, Typos corrected, References added, Figures
  improved, Discussion clarifie
Quark flavour-violating Higgs decays at the ILC

Flavour-violating Higgs interactions are suppressed in the Standard Model
such that their observation would be a clear sign of new physics. We
investigate the prospects for detecting quark flavour-violating Higgs decays in
the clean ILC environment. Concentrating on the decay to a bottom and a light
quark $j$, we identify the dominant Standard Model background channels as
coming from hadronic Standard Model Higgs decays with mis-identified jets.
Therefore, good flavour tagging capabilities are essential to keep the
background rate under control. Through a simple cut-based analysis, we find
that the most promising search channel is the two-jet plus missing energy
signature $e^+e^-\to bj+E_{T}^\text{miss}$. At 500 GeV, the expected $95\,$% CL
upper limit on $\mathcal{B}(h\to bj)$ is of order $10^{-3}$. Correspondingly, a
$5\,\sigma$ discovery is expected to be possible for branching ratios as low as
a few $10^{-3}$.Comment: 9 pages, 6 figures, 5 tables. Minor typos fixed with respect to v
Toda Theory From Six Dimensions

We describe a compactification of the six-dimensional (2,0) theory on a
four-sphere which gives rise to a two-dimensional Toda theory at long
distances. This construction realizes chiral Toda fields as edge modes trapped
near the poles of the sphere. We relate our setup to compactifications of the
(2,0) theory on the five and six-sphere. In this way, we explain a connection
between half-BPS operators of the (2,0) theory and two-dimensional W-algebras,
and derive an equality between their conformal anomalies. As we explain, all
such relationships between the six-dimensional (2,0) theory and Toda field
theory can be interpreted as statements about the edge modes of complex
Chern-Simons on various three-manifolds with boundary.Comment: 40 pages, 2 figure
Anomaly-corrected supersymmetry algebra and supersymmetric holographic
  renormalization

We present a systematic approach to supersymmetric holographic
renormalization for a generic 5D $\mathcal{N}=2$ gauged supergravity theory
with matter multiplets, including its fermionic sector, with all gauge fields
consistently set to zero. We determine the complete set of supersymmetric local
boundary counterterms, including the finite counterterms that parameterize the
choice of supersymmetric renormalization scheme. This allows us to derive
holographically the superconformal Ward identities of a 4D superconformal field
theory on a generic background, including the Weyl and super-Weyl anomalies.
Moreover, we show that these anomalies satisfy the Wess-Zumino consistency
condition. The super-Weyl anomaly implies that the fermionic operators of the
dual field theory, such as the supercurrent, do not transform as tensors under
rigid supersymmetry on backgrounds that admit a conformal Killing spinor, and
their anticommutator with the conserved supercharge contains anomalous terms.
This property is explicitly checked for a toy model. Finally, using the
anomalous transformation of the supercurrent, we obtain the anomaly-corrected
supersymmetry algebra on curved backgrounds admitting a conformal Killing
spinor.Comment: 51 pages; v2: two references added, typos corrected, a discussion
  about the 2-dimensional super-Weyl anomaly added in section
$T$-folds from Yang-Baxter deformations

Yang-Baxter (YB) deformations of type IIB string theory have been well
studied from the viewpoint of classical integrability. Most of the works,
however, are focused upon the local structure of the deformed geometries and
the global structure still remains unclear. In this work, we reveal a
non-geometric aspect of YB-deformed backgrounds as $T$-fold by explicitly
showing the associated $\mathrm{O}(D,D;\mathbb{Z})$ $T$-duality monodromy. In
particular, the appearance of an extra vector field in the generalized
supergravity equations (GSE) leads to the non-geometric $Q$-flux. In addition,
we study a particular solution of GSE that is obtained by a non-Abelian
$T$-duality but cannot be expressed as a homogeneous YB deformation, and show
that it can also be regarded as a $T$-fold. This result indicates that
solutions of GSE should be non-geometric quite in general beyond the YB
deformation.Comment: 47 page
Strings in Bubbling Geometries and Dual Wilson Loop Correlators

We consider a fundamental string in a bubbling geometry of arbitrary genus
dual to a half-supersymmetric Wilson loop in a general large representation
$\mathbf{R}$ of the $SU(N)$ gauge group in ${\cal N}=4$ Supersymmetric
Yang-Mills. We demonstrate, under some mild conditions, that the minimum value
of the string classical action for a bubbling geometry of arbitrary genus
precisely matches the correlator of a Wilson loop in the fundamental
representation and one in a general large representation. We work out the case
in which the large representation is given by a rectangular Young Tableau,
corresponding to a genus one bubbling geometry, explicitly. We also present
explicit results in the field theory for a correlator of two Wilson loops: a
large one in an arbitrary representation and a "small" one in the fundamental,
totally symmetric or totally antisymmetric representation.Comment: 40 pages + appendices, 9 figures, A new discussion of WL correlators
  using the product of characters formula, two new figures added. Typos fixed.
  Version that matches the published articl
Measurement of the $\Upsilon$(nS) polarizations in pp collisions at $\sqrt{s}$ = 7 and 8 TeV

The polarization of the $\Upsilon$(1S), $\Upsilon$(2S) and $\Upsilon$(3S) mesons, produced in pp collisions at centre-of-mass energies $\sqrt{s}$ = 7 and 8 TeV, is measured using data samples collected by the LHCb experiment, corresponding to integrated luminosities of 1 and 2 fb$^{−1}$, respectively. The measurements are performed in three polarization frames, using $\Upsilon \to \mu\mu$ decays in the kinematic region of the transverse momentum $p_T^\Upsilon$  < 30 GeV/$c$ and rapidity 2.2 < $y^\Upsilon$ < 4.5. No large polarization is observed
Locality and anomalies in warped conformal field theory

We study various aspects of warped conformal field theories (WCFTs) in two
dimensions. We find new Lagrangian WCFTs, and show that all known Lagrangian
WCFTs are local only after an infinite tuning. We deduce the anomalies of WCFTs
and relate them to central charges, as well as analyze WCFT hydrostatics,
thereby re-deriving the warped analogue of the Cardy formula. Finally, we point
out that holographic WCFTs are semi-local, that matter fields in spacelike
WAdS$_3$ black hole geometries exhibit a Gregory-Laflamme-like instability, and
that WAdS$_3$ throats do not admit a decoupling limit.Comment: 38 pages; v2: minor change
Conformal solids and holography

We argue that a $SO(d)$ magnetic monopole in an asymptotically AdS space-time
is dual to a $d$-dimensional strongly coupled system in a solid state. In light
of this, it would be remiss of us not to dub such a field configuration
$solidon$. In the presence of mixed boundary conditions, a solidon
spontaneously breaks translations (among many other symmetries) and gives rise
to Goldstone excitations on the boundary$-$the phonons of the solid. We derive
the quadratic action for the boundary phonons in the probe limit and show that,
when the mixed boundary conditions preserve conformal symmetry, the
longitudinal and transverse sound speeds are related to each other as expected
from effective field theory arguments. We then include backreaction and
calculate the free energy of the solidon for a particular choice of mixed
boundary conditions, corresponding to a relevant multi-trace deformation of the
boundary theory. We find such free energy to be lower than that of thermal AdS.
This suggests that our solidon undergoes a solid-to-liquid first order phase
transition by melting into a Schwarzschild-AdS black hole as the temperature is
raised.Comment: 31 pages; v2: incorrect calculation in sec. 4 has been deleted; main
  results unchange
Vector two-point functions in finite volume using partially quenched
  chiral perturbation theory

We calculate vector-vector correlation functions at two loops using partially
quenched chiral perturbation theory including finite volume effects and twisted
boundary conditions. We present expressions for the flavor neutral cases and
the flavor charged case with equal masses. Using these expressions we give an
estimate for the ratio of disconnected to connected contributions for the
strange part of the electromagnetic current. We give numerical examples for the
effects of partial quenching, finite volume and twisting and suggest the use of
different twists to check the size of finite volume effects. The main use of
this work is expected to be for lattice QCD calculations of the hadronic vacuum
polarization contribution to the muon anomalous magnetic moment.Comment: 31 pages, some sentences added regarding partial twisting,
  reformatted equations in appendix to make them more legibl
Intra-cone transition effect to magnetoconductivity in Dirac semimetal

We study the transport of the fermions with a small mass in the presence of
Coulomb impurities, which could be realized in slightly distorted Dirac
semimetals. Using the semiclassical Boltzmann equation, we derive the
relaxation times for two kinds of intra-cone transition process. One is due to
the effect of mass, and the other is due to the excited states in Landau levels
under the weaker magnetic field. Hence we derive the mass dependence and the
magnetic field dependence of the longitudinal magnetoconductivity in the
presence of parallel electric and magnetic fields.Comment: 20 pages, 5 figure
Topological Entanglement Entropy in Euclidean AdS3 via Surgery

We calculate the topological entanglement entropy (TEE) in Euclidean
asymptotic AdS3 spacetime using surgery. The treatment is intrinsically
three-dimensional. In the BTZ black hole background, several different
bipartitions are applied. For the bipartition along the horizon between two
single-sided black holes, TEE is exactly the Bekenstein-Hawking entropy, which
supports the ER=EPR conjecture in the Euclidean case. For other bipartitions,
we derive an Entangling-Thermal relation for each single-sided black hole,
which is of topological origin. After summing over genus-one classical
geometries, we compute TEE in the high-temperature regime. In the case where
k=1, we find that TEE is the same as that for a Moonshine double state, given
by the maximally-entangled superposition of 194 types of "anyons" in the 3d
bulk, labeled by the irreducible representations of the Monster group. We
propose this as the bulk analogue of the thermofield double state in the
Euclidean spacetime. Comparing the TEE between thermal AdS3 and BTZ solutions,
we discuss the implication of TEE on the Hawking-Page transition in 3d.Comment: version