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Nuclear PDF constraints from p+Pb collisions at the LHC

Helenius, Ilkka LU ; Paukkunen, Hannu and Eskola, Kari J. (2015) In Proceedings of Science
Abstract

As the current nuclear PDF analyses are mainly constrained by fixed-target Drell-Yan and deeply inelastic scattering data only the quark nuclear modifications at fairly large x values are in a good control. Inclusive pion production in d+Au collisions at RHIC provides some constraints for gluons but due to the limited kinematic reach of the data the gluon modifications remain uncertain especially at small values of x. In this talk, we discuss how the existing data from p+Pb collisions at the LHC can improve the nuclear PDF fits and which measurements would be sensitive to the small-x gluons. In particular, we consider inclusive hadron production, compare this to direct photons, and show estimates of the effect of CMS dijet measurements... (More)

As the current nuclear PDF analyses are mainly constrained by fixed-target Drell-Yan and deeply inelastic scattering data only the quark nuclear modifications at fairly large x values are in a good control. Inclusive pion production in d+Au collisions at RHIC provides some constraints for gluons but due to the limited kinematic reach of the data the gluon modifications remain uncertain especially at small values of x. In this talk, we discuss how the existing data from p+Pb collisions at the LHC can improve the nuclear PDF fits and which measurements would be sensitive to the small-x gluons. In particular, we consider inclusive hadron production, compare this to direct photons, and show estimates of the effect of CMS dijet measurements to the uncertainty of nuclear gluon distributions.

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Proceedings of Science
external identifiers
  • scopus:84988664478
language
English
LU publication?
yes
id
c07b8d6a-abc6-40be-9922-cf05863cf7ff
alternative location
https://arxiv.org/abs/1509.02798
date added to LUP
2016-12-14 09:55:12
date last changed
2017-02-03 13:15:21
@article{c07b8d6a-abc6-40be-9922-cf05863cf7ff,
  abstract     = {<p>As the current nuclear PDF analyses are mainly constrained by fixed-target Drell-Yan and deeply inelastic scattering data only the quark nuclear modifications at fairly large x values are in a good control. Inclusive pion production in d+Au collisions at RHIC provides some constraints for gluons but due to the limited kinematic reach of the data the gluon modifications remain uncertain especially at small values of x. In this talk, we discuss how the existing data from p+Pb collisions at the LHC can improve the nuclear PDF fits and which measurements would be sensitive to the small-x gluons. In particular, we consider inclusive hadron production, compare this to direct photons, and show estimates of the effect of CMS dijet measurements to the uncertainty of nuclear gluon distributions.</p>},
  articleno    = {036},
  author       = {Helenius, Ilkka and Paukkunen, Hannu and Eskola, Kari J.},
  language     = {eng},
  series       = {Proceedings of Science},
  title        = {Nuclear PDF constraints from p+Pb collisions at the LHC},
  year         = {2015},
}