Speaker
Dr
Polina Kravchenko
(DESY)
Description
Final measurements are reported on the double-spin asymmetries for a longitudinally polarized hydrogen and deuterium targets at HERMES using the27.6 GeV HERA lepton beam. The kinematic dependences of the longitudinal semi-inclusive asymmetry simultaneously on Bjorken-x and hadron transverse momentum p_h, and Bjorken-x and the hadron energy fraction z are explored. Additionally, the hadron charge-difference asymmetry is presented, which under certain model assumptions grants access to the parton distributions of the valence quarks.
Primary author
Dr
Polina Kravchenko
(DESY)
