Abstract
We study inclusive jet suppression and modifications in the quark-gluon plasma (QGP) with a transport-based model. The model includes vacuum-like parton shower evolution at high-virtuality, a linearized transport for jet-medium interactions, and a simple ansatz for the jet-induced hydrodynamic response of the medium. Model parameters are calibrated to nuclear modification factors for inclusive hadron {R}_{AA}^h and single inclusive jets {R}_{AA}^j with cone size R = 0.4 in 0–10% central Au-Au and Pb-Pb collisions measured at the RHIC and LHC. The calibrated model consistently describes the cone-size dependent {R}_{AA}^j (R), modifications to inclusive jet fragmentation functions and jet shape. We discuss the origin of these modifications by analyzing the medium-induced jet energy flow in this model and elucidate the interplay of hard parton evolution and jet-induced medium response. In particular, we demonstrate that the excess of soft hadrons at pT∼ 2 GeV/c in jet fragmentation function and jet shape at large r=sqrt{Delta {eta}^2+Delta {phi}^2} are consequences of both soft medium-induced gluon radiation and jet-induced medium excitation.
Highlights
Years at both the RHIC and the LHC energies [10]
Model parameters are calibrated to nuclear modification factors for inclusive hadron RAh A and single inclusive jets RAj A with cone size R = 0.4 in 0–10% central Au-Au and Pb-Pb collisions measured at the RHIC and LHC
As the first work applying this model to jet quenching phenomenology, we only vary a subset of all possible parameters in the model
Summary
We introduce the jet evolution model that has been outlined in the introduction. The initial hard processes of jet production and vacuum-like evolution of parton shower from Q ∼ phTard to Q = Q0 is modeled by Pythia. 2. The initial jet shower parton production is followed by partons-medium interactions, which are treated in a previously developed linearized partonic transport model LIDO. Jet partons excite the medium in two ways: medium partons that acquire a hard recoiled momentum in collisions with jet partons; the perturbed soft medium partons seed a linearized hydrodynamic-like response. 3. A stage of vacuum evolution of parton shower starting from the virtuality scale acquired in the last parton radiation k⊥,final to ΛQCD occurs outside the QGP medium. A stage of vacuum evolution of parton shower starting from the virtuality scale acquired in the last parton radiation k⊥,final to ΛQCD occurs outside the QGP medium It is followed by hadronization and particle decays. Details of the medium evolution model can be found in appendix A
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