出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study the isospin breaking effect on octet baryons. Using the two-flavor dynamical domainwall
QCD configurations combined with the quenched non-compact QED configurations, the
electromagnetic mass splittings between isomultiplets (p,n), (S+,S0,S−), (X0,X−) are investigated.
We evaluate the main source of statistical fluctuations in the two-point correlation function,
and find that the elimination of O(e) fluctuation (e: the QED charge) is essential to extract the
signal. Preliminary results for mp −mn as well as other mass splittings are presented. Possible
origin of systematic uncertainty is also discussed.
