Speaker
Mr
Bin Hu
(Department of Physics, The George Washington University)
Description
The $\rho (770)$ meson is the most extensively studied resonance in lattice QCD
simulations in two ($N_f=2$) and three ($N_f=2+1$) flavors. We
analyze all available phase shifts from $N_f=2$ simulations using unitarized Chiral Perturbation
Theory, allowing not only for the extrapolation in mass but also in flavor,
$N_f=2\rightarrow N_f=3$. The flavor extrapolation requires information from a global
fit to $\pi\pi$ and $\pi K$ phase shifts from experiment. The $K\bar K$ channel
has a significant effect and leads to $\rho(770)$ masses surprisingly close to the
experimental one. Chiral extrapolations of $N_f=2+1$ simulations are also presented.
Primary author
Mr
Bin Hu
(Department of Physics, The George Washington University)
Co-authors
Prof.
Andrei Alexandru
(Department of Physics, The George Washington University)
Mr
Dehua Guo
(Department of Physics, The George Washington University)
Prof.
Michael Doring
(Institute for Nuclear Studies and Department of Physics, The George Washington University, Thomas Jefferson National Accelerator Facility)
Dr
Raquel Molina
(Department of Physics, The George Washington University)
