Dresden 2013 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 14: Hadronenstruktur und -spektroskopie
HK 14.6: Vortrag
Montag, 4. März 2013, 18:15–18:30, WIL-C307
First results on the longitudinal double spin asymmetry A1p and g1p from the 2011 COMPASS data — •Malte Wilfert — for the COMPASS collaboration —Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, Johann-Joachim-Becherweg 45, 55099 Mainz
The COMPASS experiment at the M2 beamline of the CERN SPS has taken data with a polarized muon beam scattering of a polarized NH3 target in 2011. The beam energy has been increased to 200 GeV compared to 160 GeV in 2007. With the increased beam energy it is possible to reach higher values of Q2 and lower values of xBj, compared to our first measurement in 2007. We will present our results on the longitudinal double spin asymmetry A1p and the spin-dependent structure function g1p from the 2011 data taking. This results will be compared to our previously released results from 2007 and SMC.
Supported by BMBF under the contract 05P12UMCC1 and GRK Symmetry Breaking (DFG/GRK 1581)