2011

\pi N scattering in relativistic baryon chiral perturbation theory revisited

Alarcon, J. M., Camalich, J. Martin, Oller, J. A. et al.

Understand

We have analyzed pion-nucleon scattering using the manifestly relativistic covariant framework of Infrared Regularization up to {\cal O}(q^3) in the chiral expansion, where q is a generic small momentum.

We describe the low-energy phase shifts with a similar quality as previously achieved with Heavy Baryon Chiral Perturbation Theory, \sqrt{s}\lesssim1.14 GeV.
New values are provided for the {\cal O}(q^2) and {\cal O}(q^3) low-energy constants, which are compared with previous determinations.
This is also the case for the scattering lengths and volumes.

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