Jet splitting function in the vacuum and QCD medium
The two-prong structure related to the leading subjets inside a reconstructed jet opens new avenues toward precision constraints on the in-medium modification of parton showers. In this talk, we present the first resummed calculation of the soft-dropped groomed momentum sharing distribution, or the jet splitting function, in heavy-ion collisions for both light jets and heavy flavor tagged jets. Existing light jet splitting function data from the STAR experiment at RHIC and the CMS experiment at LHC can be understood in the unified framework of soft-collinear effective theory with Glauber gluon interactions. For heavy flavor jets, very interestingly, the momentum sharing distribution of b-tagged jets is more strongly modified in comparison to the one for light jets, which provides a novel handle on mass corrections to in-medium parton showers that are at present difficult to constraint using inclusive heavy meson production.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1570620
- Report Number(s):
- LA-UR-19-20679
- Journal Information:
- PoS Proceedings of Science, Vol. 345; Conference: International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Aix-Les-Bains (France), 30 Sep-15 Oct 2018; ISSN 1824-8039
- Publisher:
- SISSACopyright Statement
- Country of Publication:
- United States
- Language:
- English
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