Physical Review D

We report a search for charmless hadronic decays of neutral B mesons to the final state K⁺K^-π⁰. The results are based on a 711  fb^-1 data sample that contains 772×10⁶ BB̅ pairs, and was collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e⁺e^- collider. We f...

The inert doublet dark matter model has recently gained attention as a possible means of facilitating a strongly first-order electroweak phase transition (EWPT), as needed for baryogenesis. We extend previous results by considering the regime where the DM is heavier than half the Higgs mass, and its...

We give a new perspective on the dynamics of conformal theories realized in the SU(N) gauge theory, when the number of flavors N_f is within the conformal window. Motivated by the renormalization group argument on conformal theories with a finite IR cutoff Λ_IR, we conjecture that the propagator of a ...

We analyze geometrical scaling (GS) of negative pion multiplicity p_T distributions at NA61/SHINE energies. We show that even though NA61/SHINE energies are low, one may expect to find GS in the particle spectra. We argue that qualitative behavior of ratios of multiplicities at different energies is ...

In the framework of the Gotsman-Levin-Maor model for soft interaction with α_IP^′(0)=0, we propose a procedure based on Gribov’s partonic interpretation of the Pomeron, which enables one to calculate the diffractive mass distributions in hadron-hadron scattering. Using the analogy with deep-inelastic ...

An approach to developing a feasible neutrinoless double beta decay experiment capable of probing Majorana masses in the regime of the nondegenerate normal neutrino mass hierarchy is proposed. For such an experiment, this study suggests that ¹³⁰Te is likely the best choice of candidate isotope and t...

The decay B_c⁺→ψ(2S)π⁺ with ψ(2S)→μ⁺μ^- is observed with a significance of 5.2σ using pp collision data corresponding to an integrated luminosity of 1.0  fb^-1 collected by the LHCb experiment. The branching fraction of B_c⁺→ψ(2S)π⁺ decays relative to that of the B_c⁺→J/ψπ⁺ mode is measured to be B(B_c⁺→ψ...

We report on a search for heavy neutrinos in B-meson decays. The results are obtained using a data sample that contains 772×10⁶BB̅ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e⁺e^- collider. No signal is observed and upper limits are set on mix...

A search for the decay B_s⁰→D^*∓π^± is presented using a data sample corresponding to an integrated luminosity of 1.0  fb^-1 of pp collisions collected by LHCb. This decay is expected to be mediated by a W-exchange diagram, with little contribution from rescattering processes, and therefore a measuremen...

Recently, a general principle, called c-extremization, which determines the exact R symmetry of two-dimensional conformal field theories with N=(0,2) supersymmetry, was identified. In this work we show that the supergravity dual corresponds to the extremization of the T tensor of N=2 gauged supergra...

The potential between a heavy quark and an antiquark inside the quark-gluon plasma is studied on the basis of the gauge-gravity duality. A real-time complex potential V_QQ̅ (t,r) is derived from the Wilson loop, which is evaluated by its gravity dual in the Euclidean five-dimensional anti–de S...

We introduce a new method for numerically evolving the full Einstein field equations in situations where the spacetime is dominated by a known background solution. The technique leverages the knowledge of the background solution to subtract off its contribution to the truncation error, thereby more ...

We show that consistent nonlinear partially massless models cannot be obtained starting from “f-g” massive gravity, with “f” the embedding de Sitter space. The obstruction, which is also the source of f-g acausality, is the very same fifth constraint that removes the notorious sixth ghost excitation...

Using trace anomalies, we determine the vacuum stress tensors of arbitrary even-dimensional conformal field theories in Weyl flat backgrounds. We demonstrate a simple relation between the Casimir energy on R×S^d-1 and the type A anomaly coefficient. This relation generalizes earlier results in two an...

Kelvin waves, or Kelvons, have been known for a long time as gapless excitations propagating along superfluid vortices. These modes can be interpreted as the Nambu-Goldstone excitations arising from the spontaneous breaking of the translational symmetry. Recently a different type of gapless excitati...

It is well-known that the standard Britto-Cachazo-Feng-Witten construction cannot be used for on-shell amplitudes in effective field theories due to bad behavior for large shifts. We show how to solve this problem in the case of the SU(N) nonlinear sigma model, i.e., nonrenormalizable model with an ...

Scalar-tensor theories of gravity are natural phenomenological alternatives to General Relativity, where the gravitational interaction is mediated by a scalar degree of freedom, besides the usual tensor gravitons. In regions of the parameter space of these theories where constraints from both solar ...

The area law of Bekenstein-Hawking entropy of the black hole suggests that the black hole should have a lower-dimensional holographic description. It has been found recently that such holographic pictures could be set up from the study of the thermodynamics of both outer and inner horizons for a lar...

We show that the static and asymptotically flat black hole spacetime is unique to be Schwarzschild spacetime in the dynamical Chern-Simons gravity. In addition, we show that the strictly static spacetimes should be the Minkowski spacetime.

The article delivers the only still unknown coefficient in the 4th post-Newtonian energy expression for binary point masses on circular orbits as a function of orbital angular frequency. Apart from a single coefficient, which is known solely numerically, all the coefficients are given as exact numbe...

We use the Lagrange-Noether methods to derive the conservation laws for models in which matter interacts nonminimally with the gravitational field. The nonminimal coupling function can depend arbitrarily on the gravitational field strength. The obtained result generalizes earlier findings. The gener...

Previous studies of the semilinear wave equation in Minkowski space have shown a type of critical behavior in which large initial data collapse to singularity formation due to nonlinearities while small initial data does not. Numerical solutions in spherically symmetric anti–de Sitter space are pres...

We show that the cusp in the dark matter distribution required to explain the recently found excess in the gamma-ray spectrum at energies ∼130  GeV in terms of the dark matter annihilations cannot survive the tidal forces if it is offset by ∼1.5° from the Galactic center as suggested by observations...

Inflationary theory predicts that the observable Universe should be very close to flat, with a spatial-curvature parameter |Ω_K|≲10^-4. The WMAP satellite currently constrains |Ω_K|≲0.01, and the Planck satellite will be sensitive to values near 10^-3. Suppose that Planck were to find Ω_K≠0 at this level...

Recent results of the KASCADE-Grande experiment provided evidence for a mild knee-like structure in the all-particle spectrum of cosmic rays at E=10^16.92±0.10  eV, which was found to be due to a steepening in the flux of heavy primary particles. The spectrum of the combined components of light and i...

In this paper we investigate the localization and mass spectra of various matter fields with spin 0, 1 and 1/2 on a geometric thick brane generated by pure four-dimensional (4D) and five-dimensional positive cosmological constants without bulk scalar fields. This model possesses a 4D cosmological co...

The basic principles of the correlation femtoscopy, including its correspondence to the Hanbury Brown and Twiss intensity interferometry, are reexamined. The main subject of the paper is an analysis of the correlation femtoscopy when the source size is as small as the order of the uncertainty limit....

We discuss inclusive production of open charm in proton-proton scattering at LHC. The calculation is performed within the k_t-factorization approach. Different models of unintegrated gluon distributions (UGDFs) from the literature are used. The theoretical transverse momentum as well as (pseudo)rapid...

We explore the effects of the resummation of large logarithmic perturbative corrections to double-longitudinal spin asymmetries for inclusive and semi-inclusive deep inelastic scattering in fixed-target experiments. We find that the asymmetries are overall rather robust with respect to the inclusion...

Based on a sample of 2.25×10⁸ J/ψ events collected with the BESIII detector at BEPCII, a full partial wave analysis on J/ψ→γηη was performed using the relativistic covariant tensor amplitude method. The results show that the dominant 0⁺⁺ and 2⁺⁺ components are from the f₀(1710), f₀(2100), f₀(1500), ...

A search is presented for free heavy long-lived fractionally charged particles produced in pp collisions at √s=7  TeV. The data sample was recorded by the CMS detector at the LHC and corresponds to an integrated luminosity of 5.0  fb^-1. Candidate fractionally charged particles are identified by sele...

First observations and measurements of the branching fractions of the B̅ _s⁰→D⁺D^-, B̅ _s⁰→D_s⁺D^- and B̅ _s⁰→D⁰D̅ ⁰ decays are presented using 1.0  fb^-1 of data collected by the LHCb experiment. These branching fractions are normalized to those of B̅ ⁰→D⁺D^-, B⁰→D^-D_s⁺ an...

We provide a simple method for writing the Dirac-Born-Infeld equations of a Dp-brane in an arbitrary static background whose metric depends only on the holographic radial coordinate z. Using this method we revisit the Karch-O’Bannon procedure to calculate the dc conductivity in the presence of const...

We identify a natural analytic continuation in four dimensions from Minkowski signature to a signature with two timelike momentum components. For two-, three-, and four-point diagrams whose external momenta define a scattering plane, this continuation can be implemented as a contour deformation that...

We consider minimally supersymmetric Yang-Mills theory with a Chern-Simons term on a flat spatial two-torus in the limit when the torus becomes small. The zero modes of the fields then decouple from the nonzero modes and give rise to a spectrum of states with energies that are given by multiples of ...

We present an elementary derivation of the width of photon decay in a weak magnetic field using the semiclassical method of worldline instantons. The calculation is generalized to a model of quantum electrodynamics with broken Lorentz symmetry. Implications for the search of deviations from Lorentz ...

We calculate the quantum corrections to the Newtonian potential induced by a massless, nonminimally coupled scalar field on Minkowski background. We make use of the graviton vacuum polarization calculated in our previous work and solve the equation of motion nonperturbatively. When written as the qu...

Catalyzed symmetry breaking arises from a parametric enhancement of critical fluctuations independently of the coupling strength. Symmetry-breaking fermionic long-range fluctuations exhibit such an enhancement on negatively curved spaces, as is known from mean-field studies. We study gravitational c...

Recently the lower bounds of the intergalactic magnetic fields 10^-16∼10^-20  G are set by gamma-ray observations while it is unlikely to generate such large scale magnetic fields through astrophysical processes. It is known that large scale magnetic fields could be generated if there exist cosmologic...

The inflationary account for the emergence of the seeds of cosmic structure falls short of actually explaining the generation of primordial anisotropies and inhomogeneities. This description starts from a symmetric background, and invokes symmetric dynamics, so it cannot explain asymmetries. To gene...

When D-branes are inserted in flux backgrounds of opposite charge, the resulting solution has a certain singularity in the fluxes. Recently it has been argued, using numerical solutions, that for anti-D3 branes in the Klebanov-Strassler background, these singularities cannot be cloaked by a horizon,...

Vortons can be viewed as (flat space) field theory analogs of black rings in general relativity. They are made from loops of vortices, being sustained against collapse by the centrifugal force. In this work we discuss such configurations in the global version of Witten’s U(1)×U(1) theory. We first c...

A new model-independent method is presented for the analysis of pulsar timing data and the estimation of the spectral properties of an isotropic gravitational wave background (GWB). Taking a Bayesian approach, we show that by rephrasing the likelihood we are able to eliminate the most costly aspects...

Previous work established a universal form for the equation of motion of small bodies in theories of a metric and other tensor fields that have second-order field equations following from a covariant Lagrangian in four spacetime dimensions. Differences in the motion of the “same” body in two differe...

Recent cosmic microwave background measurements at high multipoles from the South Pole Telescope and from the Atacama Cosmology Telescope seem to disagree in their conclusions for the neutrino and dark radiation properties. In this paper we set new bounds on the dark radiation and neutrino propertie...

The presence of massive neutrinos has a characteristic impact on the growth of large scale structures such as galaxy clusters. We forecast on the capability of the number count and power spectrum measured from the ongoing and future Sunyaev-Zeldovich cluster surveys, combined with cosmic microwave b...

According to conventional wisdom, in the standard model (SM) of particle physics and cosmology the “effective number of neutrinos” measured in the late Universe is N_eff=3 (more precisely, 3.046). For extensions of the standard model allowing for the presence of ΔN_ν “equivalent neutrinos” (or “dark r...

If dark matter is mainly composed of axions, the density distribution can be nonuniformly distributed, being clumpy instead. By solving the Einstein-Klein-Gordon system of a scalar field with the potential energy density of an axionlike particle, we obtain the maximum mass of the self-gravitating sy...

The magnetization of neutron star matter in magnetic fields is studied by employing the FSUGold interaction. It is found that the magnetic susceptibilities of the charged particles (proton, electron, and muon) can be larger than that of the neutron. The effects of the anomalous magnetic moments of e...