pinecone/core-2020-05-10-deduplication huggingface dataset:
Naturalness of the Non-Universal MSSM in the Light of the Recent Higgs Results

We analyse the naturalness of the Minimal Supersymmetric Standard Model (MSSM) in the light of recent LHC results from the ATLAS and CMS experiments. We study non-universal boundary conditions for the scalar and the gaugino sector, with fixed relations between some of the soft breaking parameters, and find a significant reduction of fine-tuning for non-universal gaugino masses. For a Higgs mass of about 125 GeV, as observed recently, we find parameter regions with a fine-tuning of O (10), taking into account experimental and theoretical uncertainties. These regions also survive after comparison with simplified model searches in ATLAS and CMS. For a fine-tuning less than 20 the lightest neutralino is expected to be lighter than about 400 GeV and the lighter stop can be as heavy as 3.5TeV. On the other hand, the gluino mass is required to be above 1.5 TeV. For non-universal gaugino masses, we discuss which fixed GUT scale ratios can lead to a reduced fine-tuning and find that the recent Higgs results have a strong impact on which ratio is favoured. We also discuss the naturalness of GUT scale Yukawa relations, comparing the non-universal MSSM with the CMSSM
Lifshitz-like solutions with hyperscaling violation in ungauged
  supergravity

In this note we describe several procedures to construct, from known
black-hole and black-brane solutions of any ungauged supergravity theory,
non-trivial gravitational solutions whose "near-horizon" and "near-singularity"
limits are Lifshitz-like spacetimes with dynamical critical exponent z,
"hyperscaling violation" exponent \theta and Lifshitz radius \ell that depends
on the physical parameters of the original black-hole solution. Since the new
Lifshitz-like solutions can be constructed from any black-hole solution of any
ungauged supergravity, many of them can be easily embedded in String Theory.
Some of the procedures produce supersymmetric Lifshitz-like solutions.Comment: 20 page
Higher Spin Currents in the Holographic N=1 Coset Minimal Model

In the N=1 supersymmetric coset minimal model based on (B_N^{(1)} \oplus
D_N^{(1)}, D_N^{(1)}) at level (k,1) studied recently, the standard N=1 super
stress tensor of spins (3/2,2) is reviewed. By considering the stress tensor in
the coset (B_N^{(1)}, D_N^{(1)}) at level k, the higher spin-2' Casimir current
was obtained previously. By acting the above spin-3/2 current on the higher
spin-2' Casimir current, its superpartner, the higher spin-5/2 current, can be
generated and combined as the first higher spin supercurrent with spins (2',
5/2). By calculating the operator product expansions (OPE) between the higher
spin supercurrent and itself, the next higher spin supercurrent can be
generated with spins (7/2,4). Moreover, the other higher spin supercurrent with
spins (4',9/2) can be generated by calculating the OPE between the first higher
spin supercurrent with spins (2', 5/2) and the second higher spin supercurrent
with spins (7/2,4). Finally, the higher spin supercurrent, (11/2,6), can be
extracted from the right hand side of OPE between the higher spin
supercurrents, (2', 5/2) and (4', 9/2).Comment: 97 pages; footnotes 1, 7 and 9 and the last paragraph of Appendix F
  added and to appear in JHE
Intersecting D6-branes on the Z_{12}-II orientifold

Much work has been done by a number of authors with the aim of constructing
the supersymmetric Standard Model in type IIA intersecting-brane theories
compactified on an orientifold with various Z_N or Z_M x Z_N point groups. Here
we consider the Z_{12} point group which has previously received comparatively
little attention. We consider intersecting D6-branes that wrap 3-cycles
consisting of a 2-cycle of the 4-dimensional lattice upon which the Z_{12} is
realised times a 1-cycle of the remaining 2-torus. Our discussion is restricted
to the case when these 2-cycles are "factorisable" in the sense discussed in
section 3. Although it is possible to find models with the correct
supersymmetric Standard Model quark-doublet content, we have not found it
possible to obtain the correct quark-singlet content.Comment: Slightly revised version to be published in JHEP, 24 page
Second order transport from anomalies

We study parity odd transport at second order in derivative expansion for a non-conformal charged fluid. We see that there are 27 parity odd transport coefficients, of which 12 are non-vanishing in equilibrium. We use the equilibrium partition function method to express 7 of these in terms of the anomaly, shear viscosity, charge diffusivity and thermodynamic functions. The remaining 5 are constrained by 3 relations which also involve the anomaly. We derive Kubo formulae for 2 of the transport coefficients and show these agree with that derived from the equilibrium partition function
Discrete R symmetries and anomalies

We comment on aspects of discrete anomaly conditions focussing particularly on R symmetries. We review the Green-Schwarz cancellation of discrete anomalies, providing a heuristic explanation why, in the heterotic string, only the “model-independent dilaton” transforms non-linearly under discrete symmetries; this argument suggests that, in other theories, multiple fields might play a role in anomaly cancellations, further weakening any anomaly constraints at low energies. We provide examples in open string theories of non-universal discrete anomalies at low energies. We then consider the fact that R symmetries are necessarily broken at low energies. We exhibit dynamical models, in which fields charged under the Standard Model gauge group (for example, a doublet and a triplet) gain roughly equal masses, but where the doublet and the triplet possess different discrete charges and the low-energy anomaly conditions fail
Two-loop Sunset Integrals at Finite Volume

We show how to compute the two-loop sunset integrals at finite volume, for
non-degenerate masses and non-zero momentum. We present results for all
integrals that appear in the Chiral Perturbation Therory ($\chi$PT) calculation
of the pseudoscalar meson masses and decay constants at NNLO, including the
case of Partially Quenched $\chi$PT. We also provide numerical implementations
of the finite-volume sunset integrals, and review the results for one-loop
integrals at finite volume.Comment: 45 page
Search for C  = + charmonium and XYZ states in e + e −  → γ +  H at BESIII

Within the framework of nonrelativistic quantum chromodynamics, we study the production of C  = + charmonium states H in e + e −  → γ +  H at BESIII with H  = η c ( nS ) (n = 1, 2, 3, and 4), χ cJ ( nP ) (n = 1, 2, and 3), and 1 D 2 ( nD ) (n = 1 and 2). The radiative and relativistic corrections are calculated to next-to-leading order for S and P wave states. We then argue that the search for C  = + XYZ states such as X (3872), X (3940), X (4160), and X (4350) in e + e −  → γ +  H at BESIII may help clarify the nature of these states. BESIII can search for XY Z states through two body process e + e −  → γ H , where H decay to J/ ψπ + π − , J/ ψ ϕ , or D $ \overline{D} $ . This result may be useful in identifying the nature of C  = + XYZ states. For completeness, the production of C  = + charmonium in e + e −  → γ +  H at B factories is also discussed
Thermodynamics of higher spin black holes in AdS 3

We discuss the thermodynamics of recently constructed three-dimensional higher spin black holes in SL( N, $ \mathbb{R} $ ) × SL( N, $ \mathbb{R} $ ) Chern-Simons theory with generalized asymptotically-anti-de Sitter boundary conditions. From a holographic perspective, these bulk theories are dual to two-dimensional CFTs with W N symmetry algebras, and the black hole solutions are dual to thermal states with higher spin chemical potentials and charges turned on. Because the notion of horizon area is not gauge-invariant in the higher spin theory, the traditional approaches to the computation of black hole entropy must be reconsidered. One possibility, explored in the recent literature, involves demanding the existence of a partition function in the CFT, and consistency with the first law of thermodynamics. This approach is not free from ambiguities, however, and in particular different definitions of energy result in different expressions for the entropy. In the present work we show that there are natural definitions of the thermodynamically conjugate variables that follow from careful examination of the variational principle, and moreover agree with those obtained via canonical methods. Building on this intuition, we derive general expressions for the higher spin black hole entropy and free energy which are written entirely in terms of the Chern-Simons connections, and are valid for both static and rotating solutions. We compare our results to other proposals in the literature, and provide a new and efficient way to determine the generalization of the Cardy formula to a situation with higher spin charges
A Holographic P-wave Superconductor Model

We study a holographic p-wave superconductor model in a four dimensional
Einstein-Maxwell-complex vector field theory with a negative cosmological
constant. The complex vector field is charged under the Maxwell field. We solve
the full coupled equations of motion of the system and find black hole
solutions with the vector hair. The vector hairy black hole solutions are dual
to a thermal state with the U(1) symmetry as well as the spatial rotational
symmetry breaking spontaneously. Depending on two parameters, the mass and
charge of the vector field, we find a rich phase structure: zeroth order, first
order and second order phase transitions can happen in this model. We also find
"retrograde condensation" in which the hairy black hole solution exists only
for the temperatures above a critical value with the free energy much larger
than the black hole without hair. We construct the phase diagram for this
system in terms of the temperature and charge of the vector field.Comment: v3: 26 pages, 15 figures, references added, extra arguments added, to
  appear in JHE
A next-to-leading Luescher formula

We propose a next-to-leading Luescher-like formula for the finite-size
corrections of the excited states energies in integrable theories. We
conjecture the expressions of the corrections for both the energy and the
particles' rapidities by interpreting the excited states as momenta-dependent
defects. We check the resulting formulas in some simple relativistic model and
conjecture those for the AdS5/CFT4 case.Comment: 19 pages, 2 figures;v2: minor corrections, clarifications and a
  reference adde
LHC data and aspects of new physics

We consider the implications of current LHC data on new physics with strongly interacting sector(s). We parametrize the relevant interaction Lagrangian and study the best fit values in light of current data. These are then considered within a simple framework of bosonic technicolor. We consider first the effective Lagrangian containing only spin-0 composites of the underlying theory, which corresponds to a two Higgs doublet model. With respect to this baseline, the effects of the vector bosons, a staple in strong interacting theories, are illustrated by considering two cases: first, the case where the effects of the vector bosons arise only through their mixing with the electroweak SU(2) L gauge fields and, second, the case where also a direct interaction term with neutral scalars exists. We find that the case with a direct coupling of the composite vector fields to the Higgs allows the tested model to fit the experimental results with goodness comparable to that of the SM
Scalar boundary conditions in Lifshitz spacetimes

We investigate the conditions imposable on a scalar field at the boundary of the so-called Lifshitz spacetime which has been proposed as the dual to Lifshitz field theories. For effective mass squared between −( d + z − 1) 2 / 4 and z 2 − ( d + z − 1) 2 / 4, we find a one-parameter choice of boundary condition type. The bottom end of this range corresponds to a Breitenlohner-Freedman bound; below it, the Klein-Gordon operator need not be positive, so we cannot make sense of the dynamics. Above the top end of the range, only one boundary condition type is available; here we expect compact initial data will remain compact in the future
An explicit Z ′ -boson explanation of the B → K ∗ μ + μ − anomaly

A global fit to the recent B → K ∗ μ + μ − data shows indications for a large new-physics contribution to the Wilson coefficient of the semi-leptonic vector operator. In this article we consider a simple Z ′ -boson model of 3-3-1 type that can accommodate such an effect without violating any other constraint from quark-flavour physics. Implications for yet unobserved decay modes such as B → X s ν $ \overline{v} $ and longstanding puzzles like B → πK are also discussed. The Z ′ -boson masses required to address the observed anomaly lie in the range of 7 TeV. Such heavy Z ′ bosons evade the existing bounds from precision data and direct searches, and will remain difficult to discover even at a high-luminosity LHC. The potential of an ILC as well as the next generation of low-energy parity-violation experiments in constraining the Z ′ -boson parameter space is also examined
Beam-helicity asymmetry in associated electroproduction of real photons ep → eγπN in the Δ-resonance region

The beam-helicity asymmetry in associated electroproduction of real photons, ep -> aEuro parts per thousand e gamma pi N , in the Delta(1232)-resonance region is measured using the longitudinally polarized Hera positron beam and an unpolarized hydrogen target. Azimuthal Fourier amplitudes of this asymmetry are extracted separately for two channels, ep -> aEuro parts per thousand e gamma pi(0) p and ep -> aEuro parts per thousand e gamma pi(+) n, from a data set collected with a recoil detector. All asymmetry amplitudes are found to be consistent with zero
Wilson loops and the geometry of matrix models in AdS 4 /CFT 3

We study a general class of supersymmetric AdS 4 × Y 7 solutions of M-theory that have large N dual descriptions as $ \mathcal{N} $ = 2 Chern-Simons-matter theories on S 3 . The Hamiltonian function h M for the M-theory circle, with respect to a certain contact structure on Y 7 , plays an important role in the duality. We show that an M2-brane wrapping the M-theory circle, giving a fundamental string in AdS 4 , is supersymmetric precisely at the critical points of h M , and moreover the value of this function at the critical point determines the M2-brane action. Such a configuration determines the holographic dual of a BPS Wilson loop for a Hopf circle in S 3 , and leads to an effective method for computing the Wilson loop on both sides of the correspondence in large classes of examples. We find agreement in all cases, including for several infinite families, and moreover we find that the image h M ( Y 7 ) determines the range of support of the eigenvalues in the dual large N matrix model, with the critical points of h M mapping to points where the derivative of the eigenvalue density is discontinuous
Strong subadditivity, null energy condition and charged black holes

Using the Hubeny-Rangamani-Takayanagi (HRT) conjectured formula for entanglement entropy in the context of the AdS/CFT correspondence with time-dependent backgrounds, we investigate the relation between the bulk null energy condition (NEC) of the stress-energy tensor with the strong sub-additivity (SSA) property of entanglement entropy in the boundary theory. In a background that interpolates between an AdS to an AdS-Reissner-Nordstrom-type geometry, we find that generically there always exists a critical surface beyond which the violation of NEC would naively occur. However, the extremal area surfaces that determine the entanglement entropy for the boundary theory, can penetrate into this forbidden region only for certain choices for the mass and the charge functions in the background. This penetration is then perceived as the violation of SSA in the boundary theory. We also find that this happens only when the critical surface lies above the apparent horizon, but not otherwise. We conjecture that SSA, which is thus non- trivially related to NEC, also characterizes the entire time-evolution process along which the dual field theory may thermalize
Equivalence of a-maximization and volume minimization

The low energy effective theory on a stack of D3-branes at a Calabi-Yau singularity is an $ \mathcal{N} $ = 1 quiver gauge theory. The AdS/CFT correspondence predicts that the strong coupling dynamics of the gauge theory is described by weakly coupled type IIB supergravity on AdS 5 × L 5 , where L 5 is a Sasaki-Einstein manifold. Recent results on Calabi-Yau algebras efficiently determine the Hilbert series of any superconformal quiver gauge theory. We use the Hilbert series to determine the volume of the horizon manifold in terms of the fields of the quiver gauge theory. One corollary of the AdS/CFT conjecture is that the volume of the horizon manifold L 5 is inversely proportional to the a-central charge of the gauge theory. By direct comparison of the volume determined from the Hilbert series and the a-central charge, this prediction is proved independently of the AdS/CFT conjecture
Spectral Parameters for Scattering Amplitudes in N=4 Super Yang-Mills
  Theory

Planar N=4 Super Yang-Mills theory appears to be a quantum integrable
four-dimensional conformal theory. This has been used to find equations
believed to describe its exact spectrum of anomalous dimensions. Integrability
seemingly also extends to the planar space-time scattering amplitudes of the
N=4 model, which show strong signs of Yangian invariance. However, in
contradistinction to the spectral problem, this has not yet led to equations
determining the exact amplitudes. We propose that the missing element is the
spectral parameter, ubiquitous in integrable models. We show that it may indeed
be included into recent on-shell approaches to scattering amplitude integrands,
providing a natural deformation of the latter. Under some constraints, Yangian
symmetry is preserved. Finally we speculate that the spectral parameter might
also be the regulator of choice for controlling the infrared divergences
appearing when integrating the integrands in exactly four dimensions.Comment: 49 pages, 20 figures; v2: typos fixe
Confidence in a neutrino mass hierarchy determination

In the next decade, a number of experiments will attempt to determine the neutrino mass hierarchy. Feasibility studies for such experiments generally determine the statistic $ \overline{{\varDelta {\chi^2}}} $ . As the hierarchy is a discrete choice, Δχ 2 does not obey a one degree of freedom χ 2 distribution and so the number of σ ’s of sensitivity to the hierarchy is not the square root of $ \overline{{\varDelta {\chi^2}}} $ . We present a simple Bayesian formula for the sensitivity to the hierarchy determination that can be expected from the median experiment as a function of $ \overline{{\varDelta {\chi^2}}} $
Spatially modulated instabilities of geometries with hyperscaling violation

We perform a study of possible instabilities of the infrared AdS 2 × $ {{\mathbb{R}}^2} $ region of solutions to Einstein-Maxwell-dilaton systems which exhibit an intermediate regime of hyperscaling violation and Lifshitz scaling. Focusing on solutions that are magnetically charged, we probe the response of the system to spatially modulated fluctuations, and identify regions of parameter space in which the infrared AdS 2 geometry is unstable to perturbations. The conditions for the existence of instabilities translate to restrictions on the structure of the gauge kinetic function and scalar potential. In turn, these can lead to restrictions on the dynamical critical exponent z and on the amount of hyperscaling violation θ . Our analysis thus provides further evidence for the notion that the true ground state of ‘scaling’ solutions with hyperscaling violation may be spatially modulated phases
Vector Bremsstrahlung by Ultrarelativistic Collisions in Higher
  Dimensions

A classical computation of vector bremsstrahlung in ultrarelativistic
gravitational-force collisions of massive point particles is presented in an
arbitrary number d of extra dimensions. Our method adapts the post-linear
formalism of General Relativity to the multidimensional case. The total emitted
energy, as well as its angular and frequency distribution and characteristic
values, are discussed in detail.
  For an electromagnetic mediation propagated in the bulk, the emitted energy
$E_{em}$ of scattering with impact parameter b has magnitude $E_{em} \sim e^4
e'^2 \gamma^{d+2}/(m^2 b^{3d+3})$, with dominant frequency $\omega_{em} \sim
\gamma^2/b$. For the gravitational force the charge emits via vector field,
propagated in the bulk, energy $E_{rad}\sim[G_D m' e]^2 \gamma^{d+2}/b^{3d+3}$
for $d \geq 2$, with dominant frequency $\omega\sim\gamma^2/b$ and energy
$E_{rad}\sim[G_5 m' e]^2\gamma^{3}\ln \gamma/b^{6}$ for $d=1$, with most of the
energy coming from a wide frequency region $\omega \in [\gamma/b),\gamma^2/b]
$. For the UED model with extra space volume $V=(2\pi R)^d$ the emitted energy
is $E_{UED}\sim (b^{d}/V)^2 E_{rad}$. Finally, for the ADD model, including
four dimensions, the electromagnetic field living on 3-brane, loses on emission
the energy $E_{ADD}\sim[G_D m'e]^2\gamma^{3}/(V b^{2d+3})$, with characteristic
frequency $\omega_{ADD}\sim\gamma/b$.
  The contribution of the low frequency part of the radiation (soft photons) to
the total radiated energy is shown to be negligible for all values of d. The
domain of validity of the classical result is discussed. The result is analyzed
from the viewpoint of the deWitt - Brehme - Hobbs equation (and corresponding
equations in higher dimensions).Comment: 39 pages, 4 figure
Mixing stops at the LHC

We study the phenomenology of a light stop NLSP in the presence of large mixing with either the first or the second generation. R-symmetric models provide a prime setting for this scenario, but our discussion also applies to the MSSM when a significant amount of mixing can be accommodated. In our framework the dominant stop decay is through the flavor violating mode into a light jet and the LSP in an extended region of parameter space. There are currently no limits from ATLAS and CMS in this region. We emulate shape-based hadronic SUSY searches for this topology, and find that they have potential sensitivity. If the extension of these analyses to this region is robust, we find that these searches can set strong exclusion limits on light stops. If not, then the flavor violating decay mode is challenging and may represent a blind spot in stop searches even at 13 TeV. Thus, an experimental investigation of this scenario is well motivated
Magnetic test of chiral dynamics in QCD

Strong magnetic fields in the range $ eB\gg m_{\pi}^2 $ effectively probe internal quark structure of chiral mesons and test basic parameters of the chiral theory, such as $ \left\langle {\overline{q}q} \right\rangle $ , f π . We argue on general grounds that $ \left\langle {\overline{q}q} \right\rangle $ should grow linearly with eB when charged quark degrees of freedom come into play. To make explicit estimates we extend the previously formulated chiral theory, including quark degrees of freedom, to the case of strong magnetic fields and show that the quark condensate $ {{\left| {\left\langle {\overline{q}q} \right\rangle } \right|}_{u,d }} $ grows quadratically with eB for eB <  0 . 2 GeV 2 and linearly for higher field values. These results agree quantitatively with recent lattice data and differ from χ P T predictions
N=6 superconformal gravity in three dimensions from superspace

A unique feature of N=6 conformal supergravity in three dimensions is that
the super Cotton tensor W^{IJKL} can equivalently be viewed, via the Hodge
duality, as the field strength of an Abelian vector multiplet, W^{IJ}. Using
this observation and the conformal superspace techniques developed in
arXiv:1305.3132 and arXiv:1306.1205, we construct the off-shell action for N=6
conformal supergravity. The complete component action is also worked out.Comment: 15 pages; V2: minor corrections, comments and appendix adde