Event activity-dependence of jet production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV measured with semi-inclusive hadron+jet correlations by ALICE

Abstract

We report measurement of the semi-inclusive distribution of charged-particle jets recoiling from a high transverse momentum ($p_{\mathrm{T}}$) hadron trigger, for p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV, in p-Pb events classified by event activity. This observable has been measured in pp and Pb-Pb collisions at the LHC, providing a new probe to measure quenching. Jets are reconstructed from charged particle tracks using anti-$k_{\mathrm{t}}$ with $R=0.4$ and low IR cutoff of jet constituents ($p_{\mathrm{T},\mathrm{track}}>0.15$ GeV/$c$). The complex uncorrelated jet background is corrected by a data-driven approach. Recoil jet distributions are reported for $15<p_{\mathrm{T},\mathrm{jet}}^{\mathrm{ch}}<50$ GeV/$c$. Events are classified by signal in the ALICE V0A detector, which measures forward multiplicity, and ZNA, which measures the number of neutrons at zero degrees. This self-normalized observable does not require scaling of reference distributions by $T_{\mathrm{pA}}$ , thereby avoiding the need for geometric modeling. We compare the trigger-normalized recoil jet yield for p-Pb collisions with different event activity to measure the effects of jet quenching in small systems at the LHC.

Proceedings of the Quark Matter 2017 conference, February 6-11, 2017

References in corpus (7)

• Pileup subtraction using jet areas
• Centrality dependence of particle production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$= 5.02 TeV
• Azimuthally anisotropic emission of low-momentum direct photons in Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Measurement of charged jet production cross sections and nuclear modification in p-Pb collisions at $\sqrt{s_\rm{NN}} = 5.02$ TeV
• Centrality dependence of charged jet production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Jets in d(p)-A Collisions: Color Transparency or Energy Conservation
• Next-to-leading order QCD corrections to hadron+jet production in pp collisions at RHIC