| Issue |
EPJ Web of Conferences
Volume 81, 2014
MESON 2014 – 13th International Workshop on Production, Properties and Interaction of Mesons
|
|
|---|---|---|
| Article Number | 04011 | |
| Number of page(s) | 4 | |
| Section | High energy hadron production - contributions | |
| DOI | https://doi.org/10.1051/epjconf/20148104011 | |
| Published online | 26 November 2014 | |
https://doi.org/10.1051/epjconf/20148104011
Measurement of the Polarised Drell-Yan process at COMPASS
LIP - Laboratório de Instrumentação e Física Experimental de Partículas, Av. Elias Garcia 14-1, 1000-149 Lisboa, Portugal
a e-mail: marcia@lip.pt
Published online: 26 November 2014
The COMPASS experiment at CERN has been playing an important role in the studies of the spin content of the nucleon. The Semi-Inclusive Deep Inelastic Scattering (SIDIS) process gives access to the transverse momentum dependent parton distribution functions (TMDs) by the measurement of azimuthal asymmetries that have been studied in COMPASS and published in recent years. TMDs are also accessible by the transversely polarised Drell-Yan (DY) process which will be measured in COMPASS. This will be the first ever polarised DY measurement. The valence quarks region will be dominant due to the use of a negative pion beam at 190 GeV/c momentum impinging on a transversely polarised ammonia target. The QCD prediction that Sivers TMD change sign when accessed by SIDIS or by DY will be checked by the COMPASS measurement. The data taking is scheduled to start in the fall of this year. After one year of data collection, a statistical error below 2% in the azimuthal asymmetry related to the u quark Sivers function is expected. Details of the final experimental setup will be presented.
© Owned by the authors, published by EDP Sciences, 2014
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.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.