scholarly journals Pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit Delta resonances

2016 ◽  
Vol 2016 (5) ◽  
Author(s):  
De-Liang Yao ◽  
D. Siemens ◽  
V. Bernard ◽  
E. Epelbaum ◽  
A. M. Gasparyan ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Chiral Perturbation ◽  
Nucleon Scattering ◽  
Delta Resonances ◽  
Pion Nucleon

scholarly journals Elastic pion-nucleon scattering in chiral perturbation theory: A fresh look

2016 ◽  
Vol 94 (1) ◽  
Author(s):  
D. Siemens ◽  
V. Bernard ◽  
E. Epelbaum ◽  
A. Gasparyan ◽  
H. Krebs ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Chiral Perturbation ◽  
Nucleon Scattering ◽  
Pion Nucleon

scholarly journals Elastic and inelastic pion-nucleon scattering to fourth order in chiral perturbation theory

2017 ◽  
Vol 96 (5) ◽  
Author(s):  
D. Siemens ◽  
V. Bernard ◽  
E. Epelbaum ◽  
A. M. Gasparyan ◽  
H. Krebs ◽  
...  
Keyword(s):  
Perturbation Theory ◽  
Fourth Order ◽  
Chiral Perturbation Theory ◽  
Chiral Perturbation ◽  
Nucleon Scattering ◽  
Pion Nucleon

scholarly journals Recent results of the pion-nucleon scattering and the widths of the delta and Roper resonances in BChPT

2019 ◽  
Vol 199 ◽  
pp. 01005
Author(s):  
J. Gegelia
Keyword(s):  
Field Theory ◽  
Perturbation Theory ◽  
Effective Field Theory ◽  
Degrees Of Freedom ◽  
Effective Field ◽  
Chiral Perturbation ◽  
Nucleon Scattering ◽  
Delta Resonances ◽  
Pion Nucleon ◽  
Dynamical Degrees

Recent calculations of the pion-nucleon scattering in covariant baryon chiral perturbation theory with explicit delta resonances are presented. Two-loop results of the widths of the Δ and Roper resonances are discussed in the framework of an effective field theory with nucleons, pions and the Roper and delta resonances as dynamical degrees of freedom.

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