Transverse Spin Structure of the Nucleon from COMPASS
C. Schill (for the COMPASS Collaboration)

TL;DR
This paper reports on measurements of transverse spin effects in semi-inclusive deep-inelastic scattering from COMPASS, providing new insights into the nucleon's spin structure through Collins and Sivers asymmetries.
Contribution
It presents new experimental results on Collins and Sivers asymmetries from proton target data, advancing understanding of the nucleon's transverse spin structure.
Findings
Observation of non-zero Collins asymmetries
Observation of non-zero Sivers asymmetries
Enhanced understanding of nucleon spin dynamics
Abstract
The measurement of transverse spin effects in semi-inclusive deep-inelastic scattering is an important part of the COMPASS physics program. In the years 2002-2004 data were taken by scattering a 160 GeV muon beam on a transversely polarized deuteron target. In 2007, additional data were collected on a transversely polarized proton target. New results for the Collins and Sivers asymmetries from the analysis of the proton data are presented.
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