Azimuthal asymmetries from unpolarized data at COMPASS
C. Schill (for the COMPASS collaboration)
TL;DR
This paper reports measurements of azimuthal asymmetries in semi-inclusive deep-inelastic scattering at COMPASS, providing insights into quark transverse momentum and spin-momentum correlations in the nucleon.
Contribution
It presents new experimental results on azimuthal asymmetries from unpolarized targets, enhancing understanding of transverse momentum effects in nucleons.
Findings
Measured azimuthal asymmetries for single hadrons
Provided data on intrinsic transverse momentum of quarks
Explored correlations between transverse momentum and spin
Abstract
The investigation of transverse spin and transverse momentum effects in the nucleon is one of the key physics programs of the COMPASS experiment at CERN. COMPASS investigates these effects scattering 160 GeV/c muons off a fixed NH3 or 6LiD target. The azimuthal asymmetries which appear in the cross-section of semi-inclusive deep-inelastic scattering on an unpolarized target have been measured. These asymmetries give insight into the intrinsic transverse momentum of the quarks in the nucleon by the Cahn effect and into a possible correlation between transverse momentum and transverse spin. New results for azimuthal asymmetries of single hadrons produced in scattering muons off an unpolarized 6LiD target are presented.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Superconducting Materials and Applications · Quantum Chromodynamics and Particle Interactions