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European Physical Journal C Journal
Papers
We compute the finite temperature effective potential in theO(N)xO(N) symmetric model for largeN in spacetime dimensionsd=4, 3, 2 and discuss the spontaneous symmetry breaking patterns. Ford=3 we find that the symmetry, if broken at zero temperature is restored at arbitrarily sma...
12
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It is shown that the Dirac equation with attractive monomial vector potential cannot confine a particle. General polynomial type vector potential cannot confine a particle, either. This condition is not changed by a scalar potential smaller than the vector one.
3
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From the physics standpoint the exotic matter problem is a major difficulty in thin shell wormholes (TSWs) with spherical/cylindrical throat topologies. We aim to circumvent this handicap by considering angle dependent throats in 3+1 dimensions. By considering the throat of the T...
13
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The spin-parity analysis of the data on the \(\bar{p} p \to 2 \pi^ + 2 \pi^-\) annihilation reaction at rest in liquid and in gaseous hydrogen at 3 bar pressure and in flight at \(\overline p\) momentum of \(\simeq 50\) MeV/c, collected by the Obelix spectrometer at the LEAR comp...
29
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We point out that the equivalence theorem, which relates the amplitude for a process with external longitudinally polarized vector bosons to the amplitude in which the longitudinal vector bosons are replaced by the corresponding pseudo-Goldstone bosons, is not valid for effective...
28
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. We investigate the influence of higher twist corrections to deep inelastic structure functions in the low- Q^2 and small- x HERA region. We review the general features of the lowest-order QCD diagrams which contribute to twist-4 at small- x , in particular the sign structure of...
69
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Hadron polarization (spin alignment) and polarization asymmetry are discussed in terms of the quark recombination model with the spin-orbit interaction taken into account. It is shown that predictions of this model are at least in qualitative agreement with experimental data. Var...
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By subtracting from a recent lattice measurement of the thermal vector-current correlator the known 5-loop vacuum contribution, we demonstrate that the remainder is small and shows no visible short-distance divergence. It can therefore in principle be subjected to model-independe...
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Using methods from effective field theory, an exact all-order expression for the Drell-Yan cross section at small transverse momentum is derived directly in q(T) space, in which all large logarithms are resummed. The anomalous dimensions and matching coefficients necessary for re...
348
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We present a detailed study of Higgs boson production in association with a single top quark at the LHC, at next-to-leading order accuracy in QCD. We consider total and differential cross sections, at the parton level as well as by matching short distance events to parton showers...
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Candidates for renormalizable gauge theory models on Moyal spaces constructed recently have non-trivial vacua. We show that these models support vacuum states that are invariant under both global rotations and symplectic isomorphisms which form a global symmetry group for the act...
62
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We consider the local excitation of the vacuum into an excited state which has the possibility of being CP violating. This gives rise to a dramatic effect: P, CP and T symmetries violated in high energy heavy-ion collisions at the level of a few percent.
75
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We study the hadronic decay of q\(\bar q\)g hybrid mesons. To that aim we establish the connection between the diatomic-molecule like wave functions and the standard q\(\bar q\)g wave functions. We show that inSU(6) approximation TE hybrids cannot decay intoPP, PV, VV channels wh...
75
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We present a phenomenological model for baryogenesis based on particle creation in the Friedman–Robertson–Walker (FRW) space-time. This study is a continuation of our proposal that Hawking-like radiation in FRW space-time explains several physical aspects of the early Universe in...
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A complete description of two-loop on-shell renormalization of one-lepton QED, inD dimensions, is also given. More generally, we show that there is no need of integration in the two-loop calculation of on-shell two-and three-point functions.
190
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For high precision measurements of K decays, the presence of radiated photons cannot be neglected. The Monte Carlo simulations must include the radiative corrections in order to compute the correct event counting and for efficiency calculations. In this paper, a method for simula...
95
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There are many astrophysical scenarios where extreme mass ratio inspiral (EMRI) binaries can be surrounded by inhomogenous matter distribution. The distribution of mass can affect the dynamical properties (e.g. orbital frequency, average energy radiation rate, etc.) of the EMRI. ...
0
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The inhomogeneous Bethe–Salpeter equation for an interacting system, composed of two massive scalars exchanging a massive scalar, is numerically investigated in the ladder approximation directly in Minkowski space, by using for the first time in the continuum an approach based on...
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