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Systematic study of real photon and Drell-Yan pair production in p+A (d+A) interactions

Krelina, M.; Flach Basso, Eduardo LU ; Goncalves, V. P. LU ; Nemchik, J. and Pasechnik, R. LU (2016) 45th International Symposium on Multiparticle Dynamics, ISMD 2015 In EPJ Web of Conferences 120.
Abstract

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... (More)

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.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
EPJ Web of Conferences
volume
120
publisher
EDP Sciences
conference name
45th International Symposium on Multiparticle Dynamics, ISMD 2015
external identifiers
  • scopus:84978699227
DOI
10.1051/epjconf/201612003006
language
English
LU publication?
yes
id
9cf58c2f-0428-4052-a2e9-c523594c89c0
date added to LUP
2016-08-18 19:54:50
date last changed
2017-01-16 13:11:01
@inproceedings{9cf58c2f-0428-4052-a2e9-c523594c89c0,
  abstract     = {<p>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 p<sub>T</sub>, Feynman variable x<sub>F</sub> 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 x<sub>2</sub> in the target, the latter turns out to be significant at large x<sub>1</sub> in the projectile beam and is universal at different energies and transverse momenta.</p>},
  author       = {Krelina, M. and Flach Basso, Eduardo and Goncalves, V. P. and Nemchik, J. and Pasechnik, R.},
  booktitle    = {EPJ Web of Conferences},
  language     = {eng},
  month        = {07},
  publisher    = {EDP Sciences},
  title        = {Systematic study of real photon and Drell-Yan pair production in p+A (d+A) interactions},
  url          = {http://dx.doi.org/10.1051/epjconf/201612003006},
  volume       = {120},
  year         = {2016},
}