Does there arise a significant enhancement of the dynamical quark mass in external magnetic field?

The radiative decay of the massive neutrino in the external electromagnetic fields

The radiative decay of the massive neutrino $ν_i \rightarrow ν_j γ$ is investigated in the framework of the Standard Model in external electromagnetic fields of various configurations: constant crossed field, constant uniform magnetic field, plane monochromatic wave's field. The effect of significant enhancement of the neutrino decay probability by the external field (electromagnetic catalysis) is discussed. An especially strong enhancement occurs in the case of the ultrarelativistic neutrino decay, since in this case the decay probability does not contain suppression caused by the smallness o…

Dimensional Reduction in Nambu-Jona-Lasinio Model in External Chromomagnetic Field

The effective dimensional reduction of fermion-antifermion pairing dinamics in Nambu-Jona-Lasinio model in external chromomagnetic field is considered. It is shown that such a field causes the reduction of the space dimension by one unit in contrast to an ordinary magnetic field which reduces it by two units. The enhancement of the dynamical chiral symmetry breaking due to the reduction is discussed.

Neutrino Radiative Decay in an External Electromagnetic Field via Vector Leptoquark

The massive neutrino radiative decay $ν_i \rightarrow ν_j γ$ ($i \ne j$) is investigated within the Minimal Quark-Lepton Symmetry of the Pati-Salam type based on the $SU(4)_V \times SU(2)_L \times G_R$ group in an external constant crossed field ($\vec {\cal E} \perp \vec H$, ${\cal E}=H$). The matrix element $ΔM^{(X)}$ and the decay probability $W^{(X)}$ due to the leptoquark $X$ contribution are analysed. The effect of significant enhancement of the neutrino decay by the crossed field takes place. It is shown that the leptoquark contribution to the decay probability can dominate over the $W$…

Schwinger 粒子产生：外场的快速关闭与动力学辅助之比较

Schwinger particle production: Rapid switch off of the external field versus dynamical assistance

本文比较强电场快速开关与弱高频场动力学辅助两种电子—正电子对增强机制，结合数值、世界线瞬子和局域常场方法指出现实激光关闭难以增产，而动力学辅助 Schwinger 效应可观测。

Dynamical mass generation in 2+1-dimensional electrodynamics in an external magnetic field

The influence of a magnetic field on the mass generation in 2+1 dimensional QED is considered.It is shown that the magnetic field is a catalyst of the generation of a fermion dynamical mass. The mass arises in the system with arbitrary number of fermions, not only with $N\leq 4$, as it is in the system without the magnetic field. The polarization tensor is calculated for a constant magnetic field.

Enhancement of flow anisotropies due to magnetic field in relativistic heavy-ion collisions

It is known that the presence of background magnetic field in cosmic plasma distorts the acoustic peaks in CMBR. This primarily results from different types of waves in the plasma with velocities depending on the angle between the magnetic field and the wave vector. We consider the consequences of these effects in relativistic heavy-ion collisions where very strong magnetic fields arise during early stages of the plasma evolution. We show that flow coefficients can be significantly affected by these effects when the magnetic field remains strong during early stages due to strong induced fields…