Pair production from space- and time-dependent strong fields

Fermion pair production in time-dependent fields

Particle production in classical bosonic fields is a topic of continuing interest in QED and QCD. In strong fields processes with multiple couplings to the classical field are not parametrically suppressed by powers of the coupling constant g. In the absence of an additional scale, they have to be taken into account to all orders. In the following let us consider fermion production based on the...

Gluon Pair Production From Space-Time dependent Chromofield

We study the production of gluon pairs from the QCD vacuum in the presence of a space-time dependent external chromofield by using background field method. This pair production is computed to the lowest order in coupling consatnt αs. It is shown that the gluon pair prodcution is much higher than the qq̄ pair production from the space-time dependent chromofield. Parton productions from this backg...

Dynamical Approach to Pair Production from Strong Fields

Electron-positron pair production by photons in nonuniform strong fields.

A probability of electron-positron pair production by photons in strong nonuniform fields is derived by applying a model trajectory method in the frame of a semiclassical approach. In addition to the well known invariant field parameter chi, a new invariant parameter nu is introduced to characterize the nonuniformity of the field. For nu>>1, the obtained expression is reduced to the uniform-fie...

Gluon Pair Production from a Space-Time Dependent Classical Chromofield via Vacuum Polarization

We investigate the production of gluon pairs from a space-time dependent classical chromofield via vacuum polarization within the framework of the background field method of QCD. The investigation of the production of gluon pairs is important in the study of the evolution of the quark-gluon plasma in ultra-relativistic heavy-ion collisions at RHIC and LHC.