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.
