Parts | Days | Selection | Search | Downloads | Help
HK: Fachverband Hadronen und Kerne
HK 81: Hadron Structure and Spectroscopy II
HK 81.1: Talk
Friday, March 20, 2009, 11:00–11:15, H-ZO 30
The Strange Quark Polarisation from Inclusive and Charged Kaon Spin Asymmetries — •Regine Panknin — Physikalisches Institut, Nussallee 12, 53115 Bonn
The polarisation of the strange quark in the nucleon, Δ s(x)/s(x), is - in leading order - derived from the spin asymmetry of charged kaons and the inclusive asymmetry A1d. The strange quark polarisation has been determined from the full sample of deeply inelastic scattering events on polarized deuterons collected at the COMPASS experiment at CERN from 2002 to 2006. These data made possible an extension of the Δ s(x)/s(x) analysis into the region of small x, down to x=0.004. It will be shown that the significance of these results depends critically on the ratio of the s and u quark to kaon fragmentation functions, ∫DsK+(z)dz / ∫DuK+(z)dz.