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Drell-Yan process in p+Pb collisions at the LHC

Krelina, Michal; Basso, Eduardo; Goncalves, Victor P. LU ; Nemchik, Jan and Pasechnik, Roman LU (2016) In Proceedings of Science Part F128560.
Abstract

We study the initial-state interactions (non-coherence) and nuclear shadowing (coherence) effects in the Drell-Yan pair production process in p+Pb collisions at the LHC energies. The analysis of the nuclear suppression, RpA < 1, has been performed in the color dipole approach in the large coherence length approximation. The Z0 boson contribution relevant at large dilepton invariant masses has been included. We showed that the initial-state interactions cause a strong suppression at large pT, large dilepton masses and forward rapidities leading to a breakdown of QCD factorisation that can be verified by LHC measurements. The nuclear effects on the correlation function C(Δφ) in azimuthal angle Δφ... (More)

We study the initial-state interactions (non-coherence) and nuclear shadowing (coherence) effects in the Drell-Yan pair production process in p+Pb collisions at the LHC energies. The analysis of the nuclear suppression, RpA < 1, has been performed in the color dipole approach in the large coherence length approximation. The Z0 boson contribution relevant at large dilepton invariant masses has been included. We showed that the initial-state interactions cause a strong suppression at large pT, large dilepton masses and forward rapidities leading to a breakdown of QCD factorisation that can be verified by LHC measurements. The nuclear effects on the correlation function C(Δφ) in azimuthal angle Δφ between dilepton pair and a forward pion have been discussed as well. We predict a characteristic double-peak structure of C(Δφ) for very forward pions and large-mass dilepton pairs.

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Proceedings of Science
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Part F128560
external identifiers
  • scopus:85025806242
language
English
LU publication?
yes
id
75407519-e31d-4d97-a78a-3f857bff6e44
alternative location
http://inspirehep.net/record/1589628
date added to LUP
2017-08-02 10:41:56
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2017-08-02 10:41:56
@article{75407519-e31d-4d97-a78a-3f857bff6e44,
  abstract     = {<p>We study the initial-state interactions (non-coherence) and nuclear shadowing (coherence) effects in the Drell-Yan pair production process in p+Pb collisions at the LHC energies. The analysis of the nuclear suppression, R<sub>pA</sub> &lt; 1, has been performed in the color dipole approach in the large coherence length approximation. The Z<sup>0</sup> boson contribution relevant at large dilepton invariant masses has been included. We showed that the initial-state interactions cause a strong suppression at large p<sub>T</sub>, large dilepton masses and forward rapidities leading to a breakdown of QCD factorisation that can be verified by LHC measurements. The nuclear effects on the correlation function C(Δφ) in azimuthal angle Δφ between dilepton pair and a forward pion have been discussed as well. We predict a characteristic double-peak structure of C(Δφ) for very forward pions and large-mass dilepton pairs.</p>},
  author       = {Krelina, Michal and Basso, Eduardo and Goncalves, Victor P. and Nemchik, Jan and Pasechnik, Roman},
  language     = {eng},
  series       = {Proceedings of Science},
  title        = {Drell-Yan process in p+Pb collisions at the LHC},
  volume       = {Part F128560},
  year         = {2016},
}