Pion photoproduction in a nonrelativistic theory

Details Pion photoproduction in a nonrelativistic theory Pion photoproduction in a nonrelativistic theory

2009-09-16

arxiv.org/abs/0909.3121v1

Phys.Lett.B683:172-177,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 2 figures

Scientific paper

10.1016/j.physletb.2009.12.008

The pion and nucleon mass differences generate a very pronounced cusp in the photoproduction reaction of a single pion on the nucleon. A nonrelativistic effective field theory to describe this reaction is constructed. The approach is rigorous in the sense that it is an effective field theory with a consistent power counting scheme. Expressions for the S- and P-wave multipole amplitudes for all four reaction channels at two loops are given.

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