%0 Journal Article
%T pi N scattering in relativistic baryon chiral perturbation theory reexamined
%A Alarcon, J. M.
%A Martin Camalich, J.
%A Oller, J. A.
%A Alvarez-Ruso, L.
%J Physical Review C
%D 2011
%V 83
%N 5
%I Amer Physical Soc
%@ 0556-2813
%G English
%F Alarcon_etal2011
%O ISI:000290717900006
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=633), last updated on Mon, 06 Jun 2011 16:24:39 +0000
%X We have analyzed pion-nucleon scattering using the manifestly relativistic covariant framework of infrared regularization up to 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, root s less than or similar to 1.14 GeV. New values are provided for the O(q(2)) and O(q(3)) low-energy constants, which are compared with previous determinations. This is also the case for the scattering lengths and volumes. Finally, we have unitarized the previous amplitudes and as a result the energy range where data are reproduced increases significantly.
%R 10.1103/PhysRevC.83.055205
%U http://arxiv.org/abs/1102.1537
%U https://doi.org/10.1103/PhysRevC.83.055205
%P 055205-14pp