9-14 September 2018
University of Ferrara
Europe/Rome timezone
23RD INTERNATIONAL SPIN SYMPOSIUM

Longitudinal double-spin asymmetries in semi-inclusive deep-inelastic scattering of electrons and positrons by protons and deuterons

13 Sep 2018, 14:30
20m
A10 (Polo degli Adelardi - Via Adelardi, 33)

A10

Polo degli Adelardi - Via Adelardi, 33

Parallel Sessions Nucleon Helicity Structure Nucleon helicity structure

Speaker

Dr Polina Kravchenko (PNPI NRC Kurchatov institute)

Description

A comprehensive collection of results on longitudinal double-spin asymmetries is presented for charged pions and kaons produced in semi-inclusive deep-inelastic scattering of electrons and positrons on the proton and deuteron, based on the full HERMES data set. The dependence of the asymmetries on hadron transverse momentum and azimuthal angle extends the sensitivity to the flavor structure of the nucleon beyond the distribution functions accessible in the collinear framework. No strong dependence on those variables is observed. In addition, the hadron charge-difference asymmetry is presented, which under certain model assumptions provides access to the helicity distributions of valence quarks.

Primary author

Dr Polina Kravchenko (PNPI NRC Kurchatov institute)

Presentation Materials