PoS - Proceedings of Science
Volume 387 - 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions (HardProbes2020) - Jets and High Momentum Hadrons
Measurement of γ+jet and $\pi^{0}$ +jet in central Au+Aucollisions at $\sqrt{s_{\mathrm {NN}}}$= 200 GeV with the STAR experiment
N.R. Sahoo*  on behalf of the STAR collaboration
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Published on: September 01, 2021
Abstract
We present the semi-inclusive measurement of charged jets recoiling from direct-photon and $\pi^{0}$ triggers in central Au+Au collisions at $\sqrt{s_{\mathrm {NN}}}$ = 200 GeV, using a dataset with integrated luminosity 13 $\mathrm {nb^{-1}}$ recorded by the STAR experiment in 2014. The photon and $\pi^{0}$ triggers are selected within transverse energy ($E_{T}$) between 9 GeV and 20 GeV. Charged jets are reconstructed with the anti-$k_{\mathrm{T}}$ algorithm with resolution parameters R =0.2 and 0.5. A Mixed-Event technique developed previously by STAR is used to correct the recoil jet yield for uncorrelated background, enabling recoil jet measurements over a broad $\rm p_{T,jet}$ range. We report fully corrected charged-jet yields recoiling from direct-photon and $\pi^{0}$ triggers for the above two jet radii and also discuss the jet R dependence of in-medium parton energy loss at the top RHIC energy.
DOI: https://doi.org/10.22323/1.387.0132
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