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Eccentricity and elliptic flow in proton-proton collisions from parton evolution

Avsar, Emil; Flensburg, Christoffer LU ; Hatta, Yoshitaka; Ollitrault, Jean-Yves and Ueda, Takahiro (2011) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 702(5). p.394-397
Abstract
It has been argued that high-multiplicity proton-proton collisions at the LHC may exhibit collective phenomena usually studied in the context of heavy-ion collisions, such as elliptic flow. We study this issue using DIPSY-a Monte Carlo event generator based on the QCD dipole model. We calculate the eccentricity of the transverse area defined by the spatial distribution of produced gluons. The resulting elliptic flow is estimated to be about 6%, comparable to the value in nucleus-nucleus collisions at RHIC and the LHC. Experimentally, elliptic flow is inferred from the azimuthal correlation between hadrons, which receives contributions from collective flow, and from various other effects referred to as "nonflow". We discuss how to identify... (More)
It has been argued that high-multiplicity proton-proton collisions at the LHC may exhibit collective phenomena usually studied in the context of heavy-ion collisions, such as elliptic flow. We study this issue using DIPSY-a Monte Carlo event generator based on the QCD dipole model. We calculate the eccentricity of the transverse area defined by the spatial distribution of produced gluons. The resulting elliptic flow is estimated to be about 6%, comparable to the value in nucleus-nucleus collisions at RHIC and the LHC. Experimentally, elliptic flow is inferred from the azimuthal correlation between hadrons, which receives contributions from collective flow, and from various other effects referred to as "nonflow". We discuss how to identify in experiments the signal of flow in the presence of large nonflow effects. (C) 2011 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
702
issue
5
pages
394 - 397
publisher
Elsevier
external identifiers
  • wos:000294593700013
  • scopus:80051576509
ISSN
0370-2693
DOI
10.1016/j.physletb.2011.07.031
language
English
LU publication?
yes
id
6456c3b3-5f0a-452d-b415-58a9c00afda1 (old id 2186689)
date added to LUP
2011-10-24 14:41:56
date last changed
2017-11-19 03:59:01
@article{6456c3b3-5f0a-452d-b415-58a9c00afda1,
  abstract     = {It has been argued that high-multiplicity proton-proton collisions at the LHC may exhibit collective phenomena usually studied in the context of heavy-ion collisions, such as elliptic flow. We study this issue using DIPSY-a Monte Carlo event generator based on the QCD dipole model. We calculate the eccentricity of the transverse area defined by the spatial distribution of produced gluons. The resulting elliptic flow is estimated to be about 6%, comparable to the value in nucleus-nucleus collisions at RHIC and the LHC. Experimentally, elliptic flow is inferred from the azimuthal correlation between hadrons, which receives contributions from collective flow, and from various other effects referred to as "nonflow". We discuss how to identify in experiments the signal of flow in the presence of large nonflow effects. (C) 2011 Elsevier B.V. All rights reserved.},
  author       = {Avsar, Emil and Flensburg, Christoffer and Hatta, Yoshitaka and Ollitrault, Jean-Yves and Ueda, Takahiro},
  issn         = {0370-2693},
  language     = {eng},
  number       = {5},
  pages        = {394--397},
  publisher    = {Elsevier},
  series       = {Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics},
  title        = {Eccentricity and elliptic flow in proton-proton collisions from parton evolution},
  url          = {http://dx.doi.org/10.1016/j.physletb.2011.07.031},
  volume       = {702},
  year         = {2011},
}