Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-09-04
Nucl.Phys.Proc.Suppl.207-208:49-52,2010
Physics
High Energy Physics
High Energy Physics - Experiment
Proceedings of QCD10 conference, Montpellier
Scientific paper
10.1016/j.nuclphysbps.2010.10.01
The investigation of transverse spin and transverse momentum effects in deep inelastic scattering is one of the key physics programs of the COMPASS collaboration. Three channels have been analyzed at COMPASS to access the transversity distribution function: The azimuthal distribution of single hadrons, involving the Collins fragmentation function, the azimuthal dependence of the plane containing hadron pairs, involving the two-hadron interference fragmentation function, and the measurement of the transverse polarization of Lambda hyperons in the final state. Azimuthal asymmetries in unpolarized semi-inclusive deep-inelastic scattering give important information on the inner structure of the nucleon as well, and can be used to estimate both the quark transverse momentum k_T in an unpolarized nucleon and to access the so-far unmeasured Boer-Mulders function. COMPASS has measured these asymmetries using spin-averaged 6LiD data.
COMPASS collaboration for the
Schill Christian
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