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Nuclear effects in Drell-Yan production at the LHC

Krelina, M.; Basso, E.; 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

Using the color dipole formalism we study production of Drell-Yan (DY) pairs in proton-nucleus interactions in the kinematic region corresponding to LHC experiments. Lepton pairs produced in a hard scattering are not accompanied with any final state interactions leading to either energy loss or absorption. Consequently, dileptons may serve as more efficient and cleaner probes for the onset of nuclear effects than nclusive hadron production. We perform a systematic analysis of these effects in production of Drell-Yan pairs in pPb interaction at the LHC. We present predictions for the nuclear suppression as a function of the dilepton transverse momentum, rapidity and invariant mass which can be verified by the LHC measurements. We found... (More)

Using the color dipole formalism we study production of Drell-Yan (DY) pairs in proton-nucleus interactions in the kinematic region corresponding to LHC experiments. Lepton pairs produced in a hard scattering are not accompanied with any final state interactions leading to either energy loss or absorption. Consequently, dileptons may serve as more efficient and cleaner probes for the onset of nuclear effects than nclusive hadron production. We perform a systematic analysis of these effects in production of Drell-Yan pairs in pPb interaction at the LHC. We present predictions for the nuclear suppression as a function of the dilepton transverse momentum, rapidity and invariant mass which can be verified by the LHC measurements. We found that a strong nuclear suppression can be interpreted as an effective energy loss proportional to the initial energy universally induced by multiple initial state interactions. In addition, we study a contribution of coherent effects associated with the gluon shadowing affecting the observables predominantly at small and medium-high 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:84978664121
DOI
10.1051/epjconf/201612003007
language
English
LU publication?
yes
id
32a0b755-84a6-4052-b66e-d23b81d85eeb
date added to LUP
2016-08-18 19:55:34
date last changed
2016-09-23 15:20:24
@misc{32a0b755-84a6-4052-b66e-d23b81d85eeb,
  abstract     = {<p>Using the color dipole formalism we study production of Drell-Yan (DY) pairs in proton-nucleus interactions in the kinematic region corresponding to LHC experiments. Lepton pairs produced in a hard scattering are not accompanied with any final state interactions leading to either energy loss or absorption. Consequently, dileptons may serve as more efficient and cleaner probes for the onset of nuclear effects than nclusive hadron production. We perform a systematic analysis of these effects in production of Drell-Yan pairs in pPb interaction at the LHC. We present predictions for the nuclear suppression as a function of the dilepton transverse momentum, rapidity and invariant mass which can be verified by the LHC measurements. We found that a strong nuclear suppression can be interpreted as an effective energy loss proportional to the initial energy universally induced by multiple initial state interactions. In addition, we study a contribution of coherent effects associated with the gluon shadowing affecting the observables predominantly at small and medium-high transverse momenta.</p>},
  author       = {Krelina, M. and Basso, E. and Goncalves, V. P. and Nemchik, J. and Pasechnik, R.},
  language     = {eng},
  month        = {07},
  publisher    = {ARRAY(0x9e3c868)},
  series       = {EPJ Web of Conferences},
  title        = {Nuclear effects in Drell-Yan production at the LHC},
  url          = {http://dx.doi.org/10.1051/epjconf/201612003007},
  volume       = {120},
  year         = {2016},
}