https://doi.org/10.1140/epjc/s10052-019-7005-z
Regular Article - Theoretical Physics
NLO Productions of 
and 
with a global extraction of the jet transport parameter in heavy-ion collisions
1
Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan, 430079, China
2
School of Mathematics and Physics, China University of Geosciences, Wuhan, 430079, China
* e-mail: bwzhang@mail.ccnu.edu.cn
Received:
6
December
2018
Accepted:
1
June
2019
Published online:
17
June
2019
In this work, we pave the way to calculate the productions of and mesons with large 
in p+p and A+A collisions both at RHIC and LHC. The fragmentation functions (FFs) of the meson in vacuum at next-to-leading order (NLO) are obtained by evolving the NLO DGLAP evolution equations with rescaled FFs at initial scale 
from a broken SU(3) model, and the FFs of in vacuum are taken from AKK08 parametrization directly. Within the framework of the NLO pQCD improved parton model, we arrive at good descriptions of the experimental data on and in p+p both at RHIC and LHC. With the higher-twist approach, to take into account jet quenching effect by medium-modified FFs, nuclear modification factors for meson and meson both at RHIC and LHC are presented with different sets of jet transport coefficients 
. Then we make a global extraction of both at RHIC and LHC by confronting our model calculations with all available data on six identified mesons: 
, 
, 
, 
, , and . The minimum value of total 
for productions of these mesons gives the best value of 
for Au+Au collisions with 
GeV at RHIC, and 
for Pb+Pb collisions with 
TeV at LHC, respectively, with the QGP spacetime evolution given by the event-by-event viscous hydrodynamics model IEBE-VISHNU. With these global extracted values of , nuclear modification factors of , , , , , and in A+A collisions are presented, and predictions of yield ratios such as 
and 
at the high- regime in heavy-ion collisions both at RHIC and LHC are provided.
© The Author(s), 2019
