# Role of the Delta1232 in pion-deuteron scattering at threshold within chiral effective field theory - Nuclear Theory

Role of the Delta1232 in pion-deuteron scattering at threshold within chiral effective field theory - Nuclear Theory - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We investigate the role of the delta isobar in the reaction $\pi d\to \pi d$at threshold in chiral effective field theory. We discuss the correspondingpower counting and argue that this calculation completes the evaluation ofdiagrams up to the order m pi-M N^3-2, with m pi M N for the pionnucleon mass. The net effect of all delta contributions at this order to thepion-deuteron scattering length is 2.4 +- 0.4x 10^-3 m pi^{-1}.

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

Fuente: https://arxiv.org/