https://doi.org/10.1140/epjc/s10052-016-3885-3
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
* e-mail: zhanghz@mail.ccnu.edu.cn
Received:
9
June
2015
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
