26-30 March 2012
University of Bonn
Europe/Berlin timezone

Longitudinal semi-inclusive double-spin asymmetries at HERMES.

27 Mar 2012, 17:20
Lecture Hall, Institute for Physical Chemistry (University of Bonn)

Lecture Hall, Institute for Physical Chemistry

University of Bonn

Spin physics Spin physics


Dr Polina Kravchenko (DESY)


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.

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