Jun 5 – 9, 2023
Genova, Italy
Europe/Rome timezone

Dispersive determination of the $\sigma$ resonance from lattice QCD

Jun 5, 2023, 2:25 PM
DAD - Room 5L (Genova, Italy)

DAD - Room 5L

Genova, Italy

Invited Light meson spectroscopy Light meson spectroscopy


Arkaitz Rodas Bilbao (Jefferson Lab)


We determine, from Lattice QCD, the elastic $\pi \pi$ scattering amplitude in the three possible isospin channels for various quark masses. We observe that the extraction of the $\sigma$ pole position is very challenging when the state becomes unstable. By performing a full dispersive analysis, we eliminate the systematic uncertainties associated with model extractions, constrain the low energy scattering region, and determine the $\sigma$ pole position with accuracy.

Primary author

Arkaitz Rodas Bilbao (Jefferson Lab)


Jozef Dudek (JLab) Robert Edwards (Jefferson Lab)

Presentation materials