The European Physical Journal C

http://link.springer.com/journal/10052

List of Papers (Total 3,037)

Measurement of \(WW/WZ \rightarrow \ell \nu q q^{\prime }\) production with the hadronically decaying boson reconstructed as one or two jets in pp collisions at \(\sqrt{s} =8~\text {TeV}\) with ATLAS, and constraints on anomalous gauge couplings

This paper presents a study of the production of WW or WZ boson pairs, with one W boson decaying to \(e\nu \) or \(\mu \nu \) and one W or Z boson decaying hadronically. The analysis uses \(20.2~\text{ fb }^{-1}\) of \(\sqrt{s} =8~\text {TeV}\) pp collision data, collected by the ATLAS detector at the Large Hadron Collider. Cross-sections for WW / WZ production are measured in ...

AIC and BIC for cosmological interacting scenarios

In this work we study linear and nonlinear cosmological interactions, which depend on dark matter and dark energy densities in the framework of general relativity. By using the Akaike information criterion (AIC) and the bayesian information criterion (BIC) with data from SnIa (Union 2.1 and binned JLA), \(\mathrm{H(z)}\), BAO and CMB we compare the interacting models among ...

A non-perturbative study of matter field propagators in Euclidean Yang–Mills theory in linear covariant, Curci–Ferrari and maximal Abelian gauges

In this work, we study the propagators of matter fields within the framework of the refined Gribov–Zwanziger theory, which takes into account the effects of the Gribov copies in the gauge-fixing quantization procedure of Yang–Mills theory. In full analogy with the pure gluon sector of the refined Gribov–Zwanziger action, a non-local long-range term in the inverse of the ...

Superconductor in a weak static gravitational field

We provide the detailed calculation of a general form for Maxwell and London equations that takes into account gravitational corrections in linear approximation. We determine the possible alteration of a static gravitational field in a superconductor making use of the time-dependent Ginzburg–Landau equations, providing also an analytic solution in the weak field condition. Finally, ...

High- \(p_T\) dilepton tails and flavor physics

We investigate the impact of flavor-conserving, non-universal quark-lepton contact interactions on the dilepton invariant mass distribution in \(p~p \rightarrow \ell ^+ \ell ^-\) processes at the LHC. After recasting the recent ATLAS search performed at 13 TeV with 36.1 fb\(^{-1}\) of data, we derive the best up-to-date limits on the full set of 36 chirality-conserving four-fermion ...

Phase space of modified Gauss–Bonnet gravity

We investigate the evolution of non-vacuum Friedmann–Lemaître–Robertson–Walker (FLRW) spacetimes with any spatial curvature in the context of Gauss–Bonnet gravity. The analysis employs a new method which enables us to explore the phase space of any specific theory of this class. We consider several examples, discussing the transition from a decelerating into an acceleration ...

Dilaton field released under collision of dilatonic black holes with Gauss–Bonnet term

We investigate the upper limit of the gravitational radiation released upon the collision of two dilatonic black holes by analyzing the Gauss–Bonnet term. Dilatonic black holes have a dilaton hair coupled with this term. Using the laws of thermodynamics, the upper limit of the radiation is obtained, which reflected the effects of the dilaton hair. The amount of radiation released ...

Non-minimal flavored \({S}_{3}\otimes {Z}_{2}\) left–right symmetric model

We propose a non-minimal left–right symmetric model with parity symmetry where the fermion mixings arise as a result of imposing an \(\mathbf{S}_{3}\otimes \mathbf{Z}_{2}\) flavor symmetry, and an extra \(\mathbf{Z}^{e}_{2}\) symmetry is considered in the lepton sector. Then the neutrino mass matrix possesses approximately the \(\mu \)–\(\tau \) symmetry. The breaking of the \(\mu ...

Measurement of D-meson production at mid-rapidity in pp collisions at \({\sqrt{s}=7}\) TeV

The production cross sections for prompt charmed mesons \(\mathrm{D^0}\), \(\mathrm{D^+}\), \(\mathrm{D^{*+}}\) and \(\mathrm{D_s^+}\) were measured at mid-rapidity in proton–proton collisions at a centre-of-mass energy \(\sqrt{s}=7~{\mathrm {TeV}}\) with the ALICE detector at the Large Hadron Collider (LHC). D mesons were reconstructed from their decays \(\mathrm{D}^0 \rightarrow ...

Geodesic flows in a charged black hole spacetime with quintessence

We investigate the evolution of timelike geodesic congruences, in the background of a charged black hole spacetime surrounded by quintessence. The Raychaudhuri equations for three kinematical quantities namely the expansion scalar, shear and rotation along the geodesic flows in such spacetime are obtained and solved numerically. We have also analysed both the weak and the strong ...

Effects of dark energy on the efficiency of charged AdS black holes as heat engines

In this paper, we study the heat engine where a charged AdS black hole surrounded by dark energy is the working substance and the mechanical work is done via the PdV term in the first law of black hole thermodynamics in the extended phase space. We first investigate the effects of a kind of dark energy (quintessence field in this paper) on the efficiency of the RN-AdS black holes ...

Ricci cubic gravity in d dimensions, gravitons and SAdS/Lifshitz black holes

A special class of higher curvature theories of gravity, Ricci cubic gravity (RCG), in general d dimensional space-time has been investigated in this paper. We have used two different approaches, the linearized equations of motion and the auxiliary field formalism to study the massive and massless graviton propagating modes of the AdS background. Using the auxiliary field ...

Thermal fluctuations in a hyperscaling-violation background

In this paper, we study the effect of thermal fluctuations on the thermodynamics of a black geometry with hyperscaling violation. These thermal fluctuations in the thermodynamics of this system are produced from quantum corrections of geometry describing this system. We discuss the stability of this system using specific heat and the entire Hessian matrix of the free energy. We ...

Detection of relic gravitational waves in thermal case by using Adv.LIGO data of GW150914

The thermal spectrum of relic gravitational waves enhances the usual spectrum. Our analysis shows that there exist some chances for detection of the thermal spectrum in addition to the usual spectrum by comparison with sensitivity of Adv.LIGO of GW150914 and detector based on the maser light. The behavior of the inflation and reheating stages are often known as power law expansion ...

f(R) gravity solutions for evolving wormholes

The scalar–tensor f(R) theory of gravity is considered in the framework of a simple inhomogeneous space-time model. In this research we use the reconstruction technique to look for possible evolving wormhole solutions within viable f(R) gravity formalism. These f(R) models are then constrained so that they are consistent with existing experimental data. Energy conditions related to ...

Generalized spheroidal spacetimes in 5-D Einstein–Maxwell–Gauss–Bonnet gravity

The field equations for static EGBM gravity are obtained and transformed to an equivalent form through a coordinate redefinition. A form for one of the metric potentials that generalizes the spheroidal ansatz of Vaidya–Tikekar superdense stars and additionally prescribing the electric field intensity yields viable solutions. Some special cases of the general solution are considered ...

Disentangling weak and strong interactions in \(B\rightarrow K^{*}(\rightarrow K\pi )\pi \) Dalitz-plot analyses

Dalitz-plot analyses of \(B\rightarrow K\pi \pi \) decays provide direct access to decay amplitudes, and thereby weak and strong phases can be disentangled by resolving the interference patterns in phase space between intermediate resonant states. A phenomenological isospin analysis of \(B\rightarrow K^*(\rightarrow K\pi )\pi \) decay amplitudes is presented exploiting available ...

On-shell neutral Higgs bosons in the NMSSM with complex parameters

The Next-to-Minimal Supersymmetric Standard model (NMSSM) appears as an interesting candidate for the interpretation of the Higgs measurement at the LHC and as a rich framework embedding physics beyond the Standard Model. We consider the renormalization of the Higgs sector of this model in its \(\mathcal{CP}\)-violating version, and propose a renormalization scheme for the ...

Two Higgs bosons near 125 GeV in the NMSSM: beyond the narrow width approximation

In the next-to-minimal supersymmetric (NMS) Standard Model (SM), it is possible for either one of the additional singlet-like scalar and pseudoscalar Higgs bosons to be almost degenerate in mass with the \(\sim \) \(125\) GeV SM-like Higgs state. In the real NMSSM (rNMSSM), when the mass difference between two scalar states is comparable to their individual total decay widths, the ...

The projected background for the CUORE experiment

The Cryogenic Underground Observatory for Rare Events (CUORE) is designed to search for neutrinoless double beta decay of \(^{130}\)Te with an array of 988 TeO\(_2\) bolometers operating at temperatures around 10 mK. The experiment is currently being commissioned in Hall A of Laboratori Nazionali del Gran Sasso, Italy. The goal of CUORE is to reach a 90% C.L. exclusion sensitivity ...

Non-minimal derivative coupling scalar field and bulk viscous dark energy

Inspired by thermodynamical dissipative phenomena, we consider bulk viscosity for dark fluid in a spatially flat two-component Universe. Our viscous dark energy model represents phantom-crossing which avoids big-rip singularity. We propose a non-minimal derivative coupling scalar field with zero potential leading to accelerated expansion of the Universe in the framework of bulk ...

Neutrino induced vorticity, Alfvén waves and the normal modes

We consider a plasma consisting of electrons and ions in the presence of a background neutrino gas and develop the magnetohydrodynamic equations for the system. We show that the electron neutrino interaction can induce vorticity in the plasma even in the absence of any electromagnetic perturbations if the background neutrino density is left–right asymmetric. This induced vorticity ...