EPJ Web of Conferences
Volume 85, 20154th International Workshop on Transverse Polarisation Phenomena in Hard Processes (TRANSVERSITY 2014)
|Number of page(s)||7|
|Published online||23 January 2015|
New results on transverse spin asymmetries from COMPASS
1 Dipartimento di Fisica Generale, Università di Torino, Torino, Italy
2 INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino, Italy
a e-mail: email@example.com
Published online: 23 January 2015
One of the important objectives of the COMPASS experiment is the exploration of transverse spin structure of nucleon via spin (in)dependent azimuthal asymmetries in semi-inclusive deep inelastic scattering (SIDIS) of polarized leptons (and soon also Drell-Yan (DY) reactions with π−) off transversely polarized target. For this purpose a series of measurements were made in COMPASS, using 160 GeV/c longitudinally polarized muon beam and polarized 6 LiD and NH3 targets and are foreseen with 190 GeV/c π− beam on polarized NH3. The experimental results obtained by COMPASS for azimuthal effects in SIDIS play an important role in the general understanding of the three-dimensional nature of the nucleon and are widely used in theoretical analyses and global data fits. Future first ever polarized DY-data from COMPASS compared with SIDIS results will open a new chapter probing general principles of QCD TMD-formalism. In this review main focus will be given to the very recent COMPASS results obtained for SIDIS transverse spin asymmetries from four “Drell-Yan” Q2-ranges.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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