Particles, Astrophysics, and Nuclear Physics Seminar
Two-Loop Vacuum Diagrams in Background Field
UConn Physics Department
I will describe "integration-by-parts" rules for diagrams involving massive scalar propagators in a constant background electromagnetic field, and use these to obtain fully renormalized Heisenberg–Euler effective action for a general constant background field. No integrals need be evaluated in isolating the mass renormalization, and the explicit form of the background field propagators is not needed. Further, I will show that in arbitrary even dimension, for a simple case of the constant background field, the two-loop scalar QED Heisenberg–Euler effective action can be reduced to simple one-loop quantities, using just algebraic manipulations.
Monday, November 27, 2006
Gant Science Complex