Speaker
Alessia Bongallino
(University of the Basque Country UPV/EHU)
Description
The helicity parton distribution function plays a crucial role in better understanding the quark and gluon spin structure of the proton. We study the transverse momentum dependence of the quark helicity distribution by analysing experimental data on semi-inclusive deep inelastic scattering off longitudinally polarised targets provided by the HERMES Collaboration. The fit is performed at next-to-leading order in perturbative QCD. Furthermore, we discuss the impact of double spin asymmetry data from the COMPASS and CLAS12 Collaborations.
Author
Alessia Bongallino
(University of the Basque Country UPV/EHU)