Chiral perturbation theory calculation for pn -> dpipi at threshold

Details Chiral perturbation theory calculation for pn -> dpipi at threshold Chiral perturbation theory calculation for pn -> dpipi at threshold

2010-07-08

arxiv.org/abs/1007.1382v1

Physics

Nuclear Physics

Nuclear Theory

24 pages, 3 figures, 3 tables

Scientific paper

We investigate the reaction pn -> dpipi in the framework of Chiral Perturbation Theory. For the first time a complete calculation of the leading order contributions is presented. We identify various diagrams that are of equal importance as compared to those recognized in earlier works. The diagrams at leading order behave as expected by the power counting. Also for the first time the nucleon-nucleon interaction in the initial, intermediate and final state is included consistently and found to be very important. This study provides a theoretical basis for a controlled evaluation of the non-resonant contributions in two-pion production reactions in nucleon-nucleon collisions.

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