E. J. Ferrer

Neutrino Self-Energy and Index of Refraction in Strong Magnetic Field: A New Approach

Abstract The Ritus E p eigenfunction method is extended to the case of spin-1 charged particles in a constant electromagnetic field and used to calculate the one-loop neutrino self-energy in the presence of a strong magnetic field. From the obtained self-energy, the neutrino dispersion relation and index of refraction in the magnetized vacuum are determined within the field range m 2 e ⪡ eB ⪡ M 2 W . The propagation of neutrinos in the magnetized vacuum is anisotropic due to the dependence of the index of refraction on the angle between the directions of the neutrino momentum and the external field. Possible cosmological implications of the results are discussed.

Neutrino propagation in a strongly magnetized medium

We derive general expressions at the one-loop level for the coefficients of the covariant structure of the neutrino self-energy in the presence of a constant magnetic field. The neutrino energy spectrum and index of refraction are obtained for neutral and charged media in the strong-field limit (

Thermal conductivity in 3D NJL model under external magnetic field

M_{W}gg sqrt{B}gg m_{e},T,mu ,| mathbf{p}|

Beyond-constant-mass-approximation magnetic catalysis in the gauge Higgs-Yukawa model

) using the lowest Landau level approximation. The results found within the lowest Landau level approximation are numerically validated, summing in all Landau levels, for strong

Photon propagation in space-time with a compactified spatial dimension

Bgg T^{2}

SUPERCONDUCTIVITY IN DENSE ELECTROWEAK SYSTEM

and weakly-strong

Hypermagnetic field effects in the thermal bath of chiral fermions

B gtrsim T^{2}

Bose-Einstein condensation in many-particle gauge theories and external charge

fields. The neutrino energy in leading order of the Fermi coupling constant is expressed as the sum of three terms: a kinetic-energy term, a term of interaction between the magnetic field and an induced neutrino magnetic moment, and a rest-energy term. The leading radiative correction to the kinetic-energy term depends linearly on the magnetic field strength and is independent of the chemical potential. The other two terms are only present in a charged medium. For strong and weakly-strong fields, it is found that the field-dependent correction to the neutrino energy in a neutral medium is much larger than the thermal one. Possible applications to cosmology and astrophysics are considered.

Neutrinos under Strong Magnetic Fields

Abstract.The thermal conductivity of the (2+1)-dimensional NJLnmodel in the presence of a constant magnetic field is calculatednin the mean-field approximation and its different asymptoticnregimes are analyzed. Taking into account the dynamicalngeneration of a fermion mass due to the magnetic catalysisnphenomenon, it is shown that for certain relations among thentheorys parameters (particle width, temperature and magneticnfield), the profile of the thermal conductivitynversus the applied fieldnexhibits kink- and plateau-like behaviors. We point out possiblenapplications to planar condensed matter.

Spontaneous CPT violation in confined QED

Beyond-constant-mass-approximation solutions for magnetically catalyzed fermion and scalar masses are found in a gauge Higgs-Yukawa theory in the presence of a constant magnetic field. The fermion masses obtained are several orders of magnitude larger than those found in the absence of Yukawa interactions. The masses obtained within the beyond-constant-mass approximation exactly reduce to the results within the constant-mass approach when the condition