Fermion production in gauge theories

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Date/Time:Tuesday, 12 Nov 2013 from 4:10 pm to 5:00 pm
Location:A401 Zaffarano Hall
Contact:
Phone:515-294-8894
Channel:Nuclear Physics
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Dr. Florian Hebenstreit, Institute for Theoretical Physics, Heidelberg University

We investigate the production of fermions by strong background fields in Abelian gauge theories ('Schwinger effect'). We compute the non-equilibrium time evolution of gauge-invariant observables and investigate the decay of the field due to the backreaction mechanism. We discuss distinctive features of the momentum spectrum of created particles (3+1 dimensional QED) and establish a two-stage process in the dynamics of string breaking (1+1 dimensional QED). We indicate how to extend the current study to non-Abelian gauge theories to describe, e.g., quark production from gluon fields at the early stages of relativistic heavy-ion collisions.