Speaker
Arkaitz Rodas Bilbao
(Old Dominion University / Jefferson Lab)
Description
We determine from lattice QCD the $I=0,\,1,\,2$ $\pi \pi$ elastic scattering amplitudes for various quark masses. We study the quark mass dependence of the $\sigma$ resonance and observe that, as an unstable particle, its pole position determination is very noisy. By performing a full dispersive analysis, we drastically reduce the systematic uncertainties associated with model extractions of the $\sigma$ and low-energy $\pi \pi$ scattering, and determine the pole position with accuracy.
Primary author
Arkaitz Rodas Bilbao
(Old Dominion University / Jefferson Lab)
