Particles, Astrophysics, and Nuclear Physics Seminar

Two-Loop Vacuum Diagrams in Background Field

Marek Krasnansky
Graduate Student
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
2:00 pm
Gant Science Complex
Physics Department
Room P121


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