Measurement of dijet $\mathbf{{\textit{k}}_{T}}$ in \pPb{} collisions at $\mathbf{\sqrt{{\textit{s}}_{NN}}=5.02}$ TeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Accéder directement au contenu
Article Dans Une Revue Physics Letters B Année : 2015

Measurement of dijet $\mathbf{{\textit{k}}_{T}}$ in \pPb{} collisions at $\mathbf{\sqrt{{\textit{s}}_{NN}}=5.02}$ TeV

J. Adam
C. Roy
Laurent Aphecetche
Guillaume Batigne
B. Erazmus
  • Fonction : Auteur
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Magali Estienne
Marie Germain
Gines Martinez Garcia
Philippe Pillot
Alexandre Shabetai
Diego Stocco
B. Cheynis

Résumé

A measurement of dijet correlations in p-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV with the ALICE detector is presented. Jets are reconstructed from charged particles measured in the central tracking detectors and neutral energy deposited in the electromagnetic calorimeter. The transverse momentum of the full jet (clustered from charged and neutral constituents) and charged jet (clustered from charged particles only) is corrected event-by-event for the contribution of the underlying event, while corrections for underlying event fluctuations and finite detector resolution are applied on an inclusive basis. A projection of the dijet transverse momentum, $k_{\rm Ty} = p_\rm{T,jet}^\rm{ch+ne} \; \rm{sin}(\Delta\varphi_{\rm{dijet}})$ with $\Delta\varphi_{\rm{dijet}}$ the azimuthal angle between a full and charged jet and $p_\rm{T,jet}^\rm{ch+ne}$ the transverse momentum of the full jet, is used to study nuclear matter effects in p-Pb collisions. This observable is sensitive to the acoplanarity of dijet production and its potential modification in p-Pb collisions with respect to pp collisions. Measurements of the dijet $k_{\rm Ty}$ as a function of the transverse momentum of the full and recoil charged jet, and the event multiplicity are presented. No significant modification of $k_{\rm Ty}$ due to nuclear matter effects in p-Pb collisions with respect to the event multiplicity or a PYTHIA8 reference is observed.

Dates et versions

in2p3-01130008 , version 1 (11-03-2015)

Identifiants

Citer

J. Adam, G. Conesa Balbastre, J. Faivre, C. Furget, R. Guernane, et al.. Measurement of dijet $\mathbf{{\textit{k}}_{T}}$ in \pPb{} collisions at $\mathbf{\sqrt{{\textit{s}}_{NN}}=5.02}$ TeV. Physics Letters B, 2015, 746, pp.385-395. ⟨10.1016/j.physletb.2015.05.033⟩. ⟨in2p3-01130008⟩
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