Reconciling threshold and subthreshold expansions for pion–nucleon scattering

Reconciling threshold and subthreshold expansions for pion–nucleon scattering

Heavy-baryon chiral perturbation theory (ChPT) at one loop fails in relating the pion–nucleon amplitude in the physical region and for subthreshold kinematics due to loop effects enhanced by large low-energy constants. Studying the chiral convergence of threshold and subthreshold parameters up to fo...

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Bibliographic Details
Main Authors: D. Siemens, J. Ruiz de Elvira, E. Epelbaum, M. Hoferichter, H. Krebs, B. Kubis, U.-G. Meißner
Format: Article
Language:English
Published: Elsevier 2017-07-01
Series:Physics Letters B
Subjects:
Pion–baryon interactions
Dispersion relations
Chiral Lagrangians
Chiral symmetries
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269317303131

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