Hanzhong Zhang

Extracting the jet transport coefficient from jet quenching in high-energy heavy-ion collisions

Karen M. Burke, Alessandro Buzzatti, 3 Ningbo Chang, 5 Charles Gale, Miklos Gyulassy, Ulrich Heinz, Sangyong Jeon, Abhijit Majumder, Berndt Müller, Guang-You Qin, 1 Björn Schenke, Chun Shen, Xin-Nian Wang, 2 Jiechen Xu, Clint Young, and Hanzhong Zhang Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, USA Nuclear Science Division, MS 70R0319, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA Department of Physics, Columbia University, New York 10027, USA School of Physics, Shandong University, Jinan, Shandong 250100, China Institute of Particle Physics and Key Laboratory of Quarks and Lepton Physics (MOE), Central China Normal University, Wuhan 430079, China Department of Physics, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8, Canada Department of Physics, The Ohio State University, Ohio 43210, USA Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA

Dihadron tomography of high-energy nuclear collisions in next-to-leading order perturbative QCD.

Back-to-back dihadron spectra in high-energy heavy-ion collisions are studied within the next-to-leading order (NLO) perturbative QCD parton model with jet quenching incorporated via modified jet fragmentation functions due to radiative parton energy loss in dense medium. The experimentally observed appearance of back-to-back dihadrons at high

Suppression of high

p_T

p_{T}

is found to originate mainly from jet pairs produced close and tangential to the surface of the dense matter. However, a substantial fraction of observed high

hadrons in

p_T

Pb+Pb

dihadrons also comes from jets produced at the center of the medium after losing finite amount of energy. Consequently, the suppression factor of such high-

Collisions at LHC

p_T

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

hadron pairs is found to be more sensitive to the initial gluon density than the single hadron spectra that are dominated by surface emission. A simultaneous

Probing Transverse Momentum Broadening via Dihadron and Hadron-jet Angular Correlations in Relativistic Heavy-ion Collisions

chi^2

Quantifying jet transport properties via large p_T hadron production

-fit to both the single and dihadron spectra can be achieved within a narrow range of the energy loss parameters