| Issue |
EPJ Web of Conferences
Volume 120, 2016
XLV International Symposium on Multiparticle Dynamics (ISMD 2015)
|
|
|---|---|---|
| Article Number | 03006 | |
| Number of page(s) | 6 | |
| Section | 3 Poster session | |
| DOI | https://doi.org/10.1051/epjconf/201612003006 | |
| Published online | 04 July 2016 | |
https://doi.org/10.1051/epjconf/201612003006
Systematic study of real photon and Drell-Yan pair production in p+A (d+A) interactions
1 FNSPE, Czech Technical University in Prague, Brehova 7, 115 19 Prague Czech Republic
2 Instituto de Fısica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528 Rio de Janeiro, RJ 21941-972, Brazil
3 Department of Astronomy and Theoretical Physics, Lund University, SE-223 62 Lund, Sweden
4 High and Medium Energy Group, Instituto de Fisica e Matematica, Universidade Federal de Pelotas, Pelotas, RS, 96010-900, Brazil
5 Institute of Experimental Physics SAS, Watsonova 47, 04001 Kosice, Slovakia
a e-mail: michal.krelina@fjfi.cvut.cz
Published online: 4 July 2016
We study nuclear effects in production of Drell-Yan pairs and direct photons in proton-nucleus collisions. For the first time, these effects are studied within the color dipole approach using the Green function formalism which naturally incorporates the color transparency and quantum coherence effects. The corresponding numerical results for the nuclear modification factor are compared with available data. Besides, we present a variety of predictions for the nuclear suppression as a function of transverse momentum pT, Feynman variable xF and invariant mass M of the lepton pair which can be verified by experiments at RHIC and LHC. We found that the nuclear suppression is caused predominantly by effects of quantum coherence (shadowing corrections) and by the effective energy loss induced by multiple initial state interactions. Whereas the former dominate at small Bjorken x2 in the target, the latter turns out to be significant at large x1 in the projectile beam and is universal at different energies and transverse momenta.
© Owned by the authors, published by EDP Sciences, 2016
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.