Speaker
Christos Iona
(University of Cyprus & The Cyprus Institute)
Description
We present results for the nucleon axial, scalar, and tensor charges, as well as the nucleon $\sigma$-terms, using four twisted mass fermion ensembles at four lattice spacings, including one at a finer lattice spacing of $\sim 0.05$ fm. The masses of the degenerate up and down, strange, and charm quarks are tuned to approximately their physical values. We compute both isovector and isoscalar charges and their flavor decomposition, including disconnected contributions. Systematic uncertainties associated with excited-state contamination and the continuum extrapolation are assessed using the Akaike information criterion.
Authors
Christos Iona
(University of Cyprus & The Cyprus Institute)
Constantia Alexandrou
Dr
Simone Bacchio
(The Cyprus Institute)
Jacob Friedrich Finkenrath
Giannis Koutsou
(The Cyprus Institutes)
Yan Li
Dr
Gregoris Spanoudes
(University of Cyprus)