$\rho$ meson decay from the lattice
  We present preliminary results on the $\rho$ meson decay width estimated from the scattering phase shift of the I=1 two-pion system. The phase shift is calculated by the finite size formula for non-zero total momentum frame (the moving frame) derived by Rummukainen and Gottlieb, using the $N_f=2$ improved Wilson fermion action at $m_\pi/m_\rho=0.41$ and $L=2.53 {\rm fm}$. 
CP-PACS collaboration : S. Aoki, M. Fukugita, K.-I. Ishikawa, N.   Ishizuka, K. Kanaya, Y. Kuramashi, Y. Namekawa, M. Okawa,...