Tomography of high-energy nuclear collisions with photon-hadron correlations

Abstract

Within the next-to-leading order (NLO) perturbative QCD (pQCD) parton model, suppression of away-side hadron spectra associated with a high $p_T$ photon due to parton energy loss is studied in high-energy heavy-ion collisions. Dictated by the shape of the $\gamma$-associated jet spectrum in NLO pQCD, hadron spectra at large $z_T=p_T^h/p_T^{\gamma }\stackrel{>}{\sim }1$ are more sensitive to parton energy loss and therefore are dominated by surface emission of $\gamma$-associated jets, whereas small $z_T$ hadrons mainly come from fragmentation of jets with reduced energy which is controlled by the volume emission. These lead to different centrality dependence of the $\gamma$-hadron suppression for different values of $z_T$. Therefore, a complete measurement of the suppression of $\gamma$-triggered hadron spectra, including its dependence on the orientation of the $\gamma$-hadron pair with respect to the reaction plane, allows the extraction of the spatial distribution of jet quenching parameters, achieving a true tomographic study of the quark-gluon plasma in high-energy heavy-ion collisions.

4 pages in ReVTeX, 4 figures

References in corpus (8)

• Direct observation of dijets in central Au+Au collisions at sqrt(s_NN) = 200 GeV
• Systematic Comparison of Jet Energy-Loss Schemes in a realistic hydrodynamic medium
• Dihadron Tomography of High-Energy Nuclear Collisions in NLO pQCD
• Measurement of direct photon production in p + p collisions at sqrt(s) = 200 GeV
• Towards jet tomography: gamma-hadron correlations
• A systematic study of direct photon production in heavy ion collisions
• Direct photons from relativistic heavy-ion collisions
• Direct photon-charged hadron azimuthal correlations

Cited by in corpus (24)

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• Information field based global Bayesian inference of the jet transport coefficient
• Semi-inclusive photon-hadron production in pp and pA collisions at RHIC and LHC
• Disentangling Jet Modification in Jet Simulations and in Z+Jet Data
• Jet tomography in heavy ion collisions with deep learning
• Medium Response and Jet-Hadron Correlations in Relativistic Heavy-Ion Collisions
• Deep learning assisted jet tomography for the study of Mach cones in QGP
• Photon-tagged heavy meson production in high energy nuclear collisions
• Asymmetric transverse momentum broadening in an inhomogeneous medium
• Jet transport and photon bremsstrahlung via longitudinal and transverse scattering
• Parton splitting scales of reclustered large-radius jets in high-energy nuclear collisions
• Jet shape and redistribution of the lost energy from jets in Pb+Pb collisions at the LHC in a multiphase transport model
• Classification of quark and gluon jets in hot QCD medium with deep learning
• Flavor and path-length dependence of jet quenching from inclusive jet and γ-jet suppression
• Jet Fragmentation in Vacuum and Medium with gamma-hadron Correlations in PHENIX
• Jet quenching in mini-quark-gluon plasma: Medium modification factor $I_{pA}$ for photon-tagged jets
• An improved linear Boltzmann transport model for hadron and jet suppression in ultrarelativistic heavy-ion collisions
• Predictions for photon-jet correlations at forward rapidities in heavy-ion collisions
• System-size dependence of $\gamma$-jet modifications in heavy-ion collisions
• Jet cone size dependence of single inclusive jet suppression due to jet quenching in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Recent results on hard probes with ALICE and STAR