https://doi.org/10.1140/epjp/s13360-022-03247-9
Regular Article
Extracting the jet transport coefficient from hadron suppressions by confronting current NLO parton fragmentation functions
1
Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, 430079, Wuhan, China
2
Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, 510006, Guangzhou, China
3
Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Southern Nuclear Science Computing Center, South China Normal University, 510006, Guangzhou, China
Received:
13
January
2022
Accepted:
31
August
2022
Published online:
16
September
2022
Nuclear modification factors of single hadrons and dihadrons at large transverse momentum (
) in high-energy heavy-ion collisions are studied in a next-to-leading-order (NLO) perturbative QCD parton model. Parton fragmentation functions (FFs) in 
collisions are modified due to jet energy loss which is proportional to the jet transport coefficient 
characterizing the interaction between the parton jet and the produced medium. By confronting 6 current sets of NLO parton FFs for large hadron productions, we extract quantitatively via a global fit to data for both single hadron and dihadron suppressions and obtain 
at 
MeV in central 
collisions at 
GeV, and 
at 
MeV in central 
collisions at 
TeV. The numerical results show that the uncertainties for extraction are brought by the different contributions of gluon-to-hadron in the six sets of FFs due to gluon energy loss being 9/4 times of quark energy loss.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
