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Advances in the Field-theoretic Understanding of Pion Production in Nucleon-nucleon Collisions by Lensky, V.; Haidenbauer, J.; Hanhart, C.; Baru, V.; Kudryavtsev, A.; Meißner, U. -G. is a scholarly article available to read on EtoBox.

What is Advances in the Field-theoretic Understanding of Pion Production in Nucleon-nucleon Collisions about?

We study the production amplitude for the reaction $NN\to NN\pi$ up to next-to-leading order in chiral perturbation theory. We show that the irreducible chiral loops at this order exactly cancel those terms that arise from the off-shell parts of the $\pi N$ rescattering vertex. This cancellation is required for formal consistency of the whole scheme. The net effect of the inclusion of all next-to-leading order loops is to enhance the leading rescattering amplitude by a factor of 4/3 compared to phenomenological studies, bringing its contribution to the cross section for $pp\to d\pi^+$ close to the experimental value.

Author

Lensky, V.; Haidenbauer, J.; Hanhart, C.; Baru, V.; Kudryavtsev, A.; Meißner, U. -G.

Published

2006

Language

EN