Please visit Jefferson Lab Event Policies and Guidance before planning your next event: https://www.jlab.org/conference_planning.

Apr 12 – 14, 2023
Minneapolis, Minnesota
US/Central timezone

Extracting the Sigma resonance from first-principles QCD

Apr 12, 2023, 5:00 PM
20m
Orchestra C

Orchestra C

Speaker

Arkaitz Rodas (Jefferson Lab)

Description

We determine, from Lattice QCD, the elastic $\pi \pi$ scattering amplitudes in the three possible isospin channels and the $\sigma$ resonance. We extract its lineshape for several different quark masses corresponding with the state transitioning from bound to resonance. The extraction of the $\sigma$ pole position becomes very challenging when the state is unstable. We perform the first full dispersive analysis over lattice QCD data to reduce the systematic uncertainties and extract the resonance with high accuracy and improved precision.

Primary author

Arkaitz Rodas (Jefferson Lab)

Presentation materials