# The 34th International Symposium on Lattice Field Theory (Lattice 2016)

24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

## Two-flavor simulations of the rho(770) and the role of the KKbar channel

26 Jul 2016, 14:20
20m
Bulding B2a Room 2065 (Highfield Campus, University of Southampton)

### 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)

 Slides