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Study of Drell-Yan pair production on nuclear targets

Krelina, Michal; Goncalves, Victor P. LU ; Nemchik, Jan and Pasechnik, Roman LU (2017) In Journal of Physics: Conference Series 832(1).
Abstract

Drell-Yan pair production off nuclei is an ideal tool to test the cold nuclear effects occurring before a hard collision since no interaction in the final state is expected, neither energy loss or absorption. We present for the first time a comprehensive study of the nucleus-to-nucleon production ratio (the nuclear modification factor) within the color dipole approach using the Green function formalism which naturally incorporates for the color transparency and quantum coherence effects. We study a different onset of nuclear shadowing in various kinematical regions. At large values of the Feynman variable xF and dilepton invariant mass M we include also a suppression factor due to restrictions caused by the energy... (More)

Drell-Yan pair production off nuclei is an ideal tool to test the cold nuclear effects occurring before a hard collision since no interaction in the final state is expected, neither energy loss or absorption. We present for the first time a comprehensive study of the nucleus-to-nucleon production ratio (the nuclear modification factor) within the color dipole approach using the Green function formalism which naturally incorporates for the color transparency and quantum coherence effects. We study a different onset of nuclear shadowing in various kinematical regions. At large values of the Feynman variable xF and dilepton invariant mass M we include also a suppression factor due to restrictions caused by the energy conservation induced by multiple initial state interactions (ISI effects). We present a variety of predictions for the nuclear suppression as a function of xF and M that can be verified by experiments at RHIC and LHC. The mixing of coherence effects with ISI effects can be eliminated going to large values of the dilepton invariant mass. Then predictions for the nuclear suppression is a direct manifestation for the onset of net ISI effects that can be verified by the future measurements.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physics: Conference Series
volume
832
issue
1
publisher
IOP Publishing
external identifiers
  • scopus:85019672528
ISSN
1742-6588
DOI
10.1088/1742-6596/832/1/012017
language
English
LU publication?
yes
id
f0c66c7a-0cc0-47f6-baa3-8677bc561753
date added to LUP
2017-06-13 14:42:45
date last changed
2017-06-13 14:42:45
@article{f0c66c7a-0cc0-47f6-baa3-8677bc561753,
  abstract     = {<p>Drell-Yan pair production off nuclei is an ideal tool to test the cold nuclear effects occurring before a hard collision since no interaction in the final state is expected, neither energy loss or absorption. We present for the first time a comprehensive study of the nucleus-to-nucleon production ratio (the nuclear modification factor) within the color dipole approach using the Green function formalism which naturally incorporates for the color transparency and quantum coherence effects. We study a different onset of nuclear shadowing in various kinematical regions. At large values of the Feynman variable x<sub>F</sub> and dilepton invariant mass M we include also a suppression factor due to restrictions caused by the energy conservation induced by multiple initial state interactions (ISI effects). We present a variety of predictions for the nuclear suppression as a function of x<sub>F</sub> and M that can be verified by experiments at RHIC and LHC. The mixing of coherence effects with ISI effects can be eliminated going to large values of the dilepton invariant mass. Then predictions for the nuclear suppression is a direct manifestation for the onset of net ISI effects that can be verified by the future measurements.</p>},
  articleno    = {012017},
  author       = {Krelina, Michal and Goncalves, Victor P. and Nemchik, Jan and Pasechnik, Roman},
  issn         = {1742-6588},
  language     = {eng},
  month        = {04},
  number       = {1},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics: Conference Series},
  title        = {Study of Drell-Yan pair production on nuclear targets},
  url          = {http://dx.doi.org/10.1088/1742-6596/832/1/012017},
  volume       = {832},
  year         = {2017},
}