出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We present preliminary results on the r meson decay width from Nf = 2+1 full QCD configurations generated by PACS-CS Collaboration. The decay width is estimated from the P-wave scattering phase shift for the isospin I = 1 two-pion system. The finite size formula presented by Lüscher in the center of mass frame and its extension to non-zero total momentum frame by Rummukainen and Gottlieb are employed for the calculations of the phase shift. Our calculations are carried out at mp = 410 MeV (mp /mr = 0.46) and a = 0.091 fm on a 323×64 (La = 2.9fm) lattice.
