Azimuthal asymmetries in the unpolarized SIDIS cross section at COMPASS

Abstract

The study of the spin structure of the nucleon and of the effects rising from the quarks transverse momentum are part of the scientific program of COMPASS, a fixed target experiment at the CERN SPS. The azimuthal asymmetries which appear in the cross-section of SIDIS off unpolarized targets can give insights on the intrinsic momentum structure of the nucleon and on the possible correlation between transverse spin and transverse momentum of the quarks. Here we present the new results for these asymmetries obtained from the COMPASS data collected with a 160 GeV/c positive muon beam impinging on a ${}^{6}LiD$ target. The asymmetries are measured for both positive and negative hadrons, and their dependence on several kinematical variable has been studied

proceedings of SPIN2010 conference (September-October 2010, Juelich-Germany)

References in corpus (2)

• The COMPASS Experiment at CERN
• A systematic phenomenological study of the $\cos 2\varphi$ asymmetry in unpolarized semi--inclusive DIS

Cited by in corpus (4)

• The Spin Structure of the Nucleon
• Azimuthal distributions of charged hadrons, pions, and kaons produced in deep-inelastic scattering off unpolarized protons and deuterons
• Partonic Transverse Motion in Unpolarized Semi-Inclusive Deep Inelastic Scattering Processes
• Parton distributions and $\cos 2{\varphi }_h$ asymmetry induced by anomalous photon-quark coupling