Speaker
Prof.
ying chen
(institute of high energy physics, chinese academy of sciences, china)
Description
We use overlap valence quarks on the $L^3\times T=48^3\times 96$ $N_f=2+1$ domain-wall fermion configurations generated by the RBC\&UKQCD Collaboration. The light sea quark mass is at the physical point and the spatial extension is 5.5 fm. The $\rho$ mass is precisely determined to be $m_\rho=778(9)$ MeV at the physical pion mass. We also propose a strategy to reduce the noise of the wall-wall correlation functions of hadrons, through which the leptonic decay constant of $\rho$, $f_\rho$, is determined to be 209(4) MeV at the physical $m_\pi$. This value is in excellent agreement with the experimental value $f_\rho=208$ MeV derived from the process $\tau\rightarrow \rho \nu_\tau$.
Primary author
Prof.
ying chen
(institute of high energy physics, chinese academy of sciences, china)
Co-authors
Prof.
Andrei Alexandru
(George Washington Unviersity)
Prof.
Keh-Fei Liu
(University of Kentucky)
Prof.
Terrence Draper
(University of Kentucky)
Dr
Zhaofeng Liu
(Institute of High Energy Physics, Chinese Academy of Sciences)
Dr
yibo Yang
(University of kentucky)
