Pion-nucleon elastic scattering amplitude within covariant baryon chiral
perturbation theory up to $O(p^4)$ level [PDF]
Yun-hua Chen, De-liang Yao, H. Q. ZhengThe $O(p^4)$ calculation on pion-nucleon elastic scattering amplitude in EOMS scheme within covariant baryon chiral perturbation theory is reviewed. Numerical fits to partial wave amplitudes up to $\sqrt{s}=1.13$ GeV and 1.20 GeV are performed and the results are compared with previous studies.View original: http://arxiv.org/abs/1207.7212
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