Speaker
Christos Iona
(University of Cyprus & The Cyprus Institute)
Description
We determine the nucleon axial and tensor charges at the continuum limit by analyzing four $N_f=2+1+1$ twisted mass fermion ensembles, with all quark masses tuned to approximately their physical values. We include both connected and disconnected contributions to determine the isovector and isoscalar charges and their flavor decomposition. Systematic uncertainties from excited-state contamination and the continuum extrapolation are estimated using the Akaike Information Criterion. The axial charge provides crucial information on the intrinsic spin carried by quarks in the nucleon, while the tensor charge is an important input for searches for physics beyond the Standard Model.
Author
Christos Iona
(University of Cyprus & The Cyprus Institute)
Co-authors
Antonio Evangelista
Constantia Alexandrou
Ferenc Pittler
(The Cyprus Institute)
Dr
Gregoris Spanoudes
(University of Cyprus)
Simone Bacchio
(The Cyprus Institute)