the width of the roper resonance in baryon chiral perturbation theory

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ID: 241087
2016
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Abstract
We calculate the width of the Roper resonance at next-to-leading order in a systematic expansion of baryon chiral perturbation theory with pions, nucleons, and the delta and Roper resonances as dynamical degrees of freedom. Three unknown low-energy constants contribute up to the given order. One of them can be fixed by reproducing the empirical value for the width of the Roper decay into a pion and a nucleon. Assuming that the remaining two couplings of the Roper interaction take values equal to those of the nucleon, the result for the width of the Roper decaying into a nucleon and two pions is consistent with the experimental value.
Reference Key
gegelia2016physicsthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Jambul Gegelia;Ulf-G. Meißner;De-Liang Yao
Journal ACS chemical biology
Year 2016
DOI
10.1016/j.physletb.2016.07.068
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