Regular Article - Theoretical Physics
Quantifying jet transport properties via large hadron production
Key Laboratory of Quark and Lepton Physics (MOE), Institute of Particle Physics, Central China Normal University, Wuhan, 430079, China
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Accepted: 7 January 2016
Published online: 18 January 2016
Nuclear modification factor for large single hadron is studied in a next-to-leading order perturbative QCD parton model with medium-modified fragmentation functions (mFFs) due to jet quenching in high-energy heavy-ion collisions. The energy loss of the hard partons in the quark–gluon plasma is incorporated in the mFFs which utilize two most important parameters to characterize the transport properties of the hard parton jets: the jet transport parameter and the mean free path , both at the initial time . A phenomenological study of the experimental data for is performed to constrain the two parameters with simultaneous fits to Relativistic Heavy Ion Collider as well as Large Hadron Collider data. We obtain for energetic quarks GeV/fm and fm in central collisions at GeV, while GeV/fm, and fm in central collisions at TeV. Numerical analysis shows that the best fit favors a multiple scattering picture for the energetic jets propagating through the bulk medium, with a moderate averaged number of gluon emissions. Based on the best constraints for and , the estimated value for the mean-squared transverse momentum broadening is moderate which implies that the hard jets go through the medium with small reflection.
© The Author(s), 2016