The width of the Δ-resonance at two loop order in baryon chiral perturbation theory

Jambul Gegelia; Ulf-G. Meißner; Dmitrij Siemens; De-Liang Yao

doi:10.1016/j.physletb.2016.10.017

Physics Letters B (Dec 2016)

The width of the Δ-resonance at two loop order in baryon chiral perturbation theory

Jambul Gegelia,
Ulf-G. Meißner,
Dmitrij Siemens,
De-Liang Yao

Affiliations

Jambul Gegelia: Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany; Tbilisi State University, 0186 Tbilisi, Georgia
Ulf-G. Meißner: Helmholtz Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany; Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany
Dmitrij Siemens: Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany
De-Liang Yao: Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany; Corresponding author.

DOI: https://doi.org/10.1016/j.physletb.2016.10.017
Journal volume & issue: Vol. 763
pp. 1 – 8

Abstract

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We calculate the width of the delta resonance at leading two-loop order in baryon chiral perturbation theory. This gives a correlation between the leading pion–nucleon–delta and pion–delta couplings, which is relevant for the analysis of pion–nucleon scattering and other processes.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: https://www.sciencedirect.com/journal/physics-letters-b

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