Speaker
思危 胡
(高能所)
Description
We investigate the nucleon self energy through the sixth chiral order in the covariant SU(2) chiral perturbation theory (χPT) in the single baryon sector using the extended-mass-on-shell(EOMS) scheme. It is found that the EOMS scheme exhibits quite satisfactory convergence behavior through O(q^6) around physical point. We also predict the pion mass dependence of the nucleon mass to the accuracy of O(q^6), which is in satisfactory agreement with the recent lattice results over a wide range of pion mass.
