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Title: Probing medium-induced jet splitting and energy loss in heavy-ion collisions

Journal Article · · Physics Letters B

The nuclear modification of jet splitting in relativistic heavy-ion collisions at RHIC and the LHC energies is studied based on the higher twist formalism. Assuming coherent energy loss for the two splitted subjets, a non-monotonic jet energy dependence is found for the nuclear modification of jet splitting function: strongest modification at intermediate jet energies whereas weaker modification for larger or smaller jet energies. Combined with the smaller size and lower density of the QGP medium at RHIC than at the LHC, this helps to understand the groomed jet measurements from CMS and STAR Collaborations: strong modification of the momentum sharing z g distribution at the LHC and no obvious modification of z g distribution at RHIC. In addition, the observed nuclear modification pattern of the groomed jet z g distribution cannot be explained solely by independent energy loss of the two subjets. Our result may be tested in future measurements of groomed jets with lower jet energies at the LHC and larger jet energies at RHIC, for different angular separations between the two subjets.

Research Organization:
Wayne State Univ., Detroit, MI (United States); Xinyang Normal Univ. (China); Central China Normal Univ., Wuhan (China)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
11375072; 11775095; 11647066; SC0013460
OSTI ID:
1432907
Alternate ID(s):
OSTI ID: 1499153
Journal Information:
Physics Letters B, Journal Name: Physics Letters B Vol. 781 Journal Issue: C; ISSN 0370-2693
Publisher:
ElsevierCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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