Jet splitting function in the vacuum and QCD medium

Li, Hai Tao; Vitev, Ivan Mateev

doi:10.22323/1.345.0077

Title: Jet splitting function in the vacuum and QCD medium

Abstract

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.

Authors:

^[1];

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Wed Apr 24 00:00:00 EDT 2019

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Laboratory Directed Research and Development (LDRD) Program

OSTI Identifier:: 1570620

Report Number(s):: LA-UR-19-20679
Journal ID: ISSN 1824-8039

Grant/Contract Number:: 89233218CNA000001

Resource Type:: Accepted Manuscript

Journal Name:: PoS Proceedings of Science

Additional Journal Information:: Journal Volume: 345; Conference: International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions, Aix-Les-Bains (France), 30 Sep-15 Oct 2018; Journal ID: ISSN 1824-8039

Publisher:: SISSA

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Jet substructure; Soft Drop; Heavy-ion collisions

Citation Formats


                    Li, Hai Tao, and Vitev, Ivan Mateev. Jet splitting function in the vacuum and QCD medium.  United States: N. p., 2019. 
Web.  doi:10.22323/1.345.0077.

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                    Li, Hai Tao, & Vitev, Ivan Mateev. Jet splitting function in the vacuum and QCD medium.  United States.  https://doi.org/10.22323/1.345.0077

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                    Li, Hai Tao, and Vitev, Ivan Mateev. Wed .  
"Jet splitting function in the vacuum and QCD medium".  United States.  https://doi.org/10.22323/1.345.0077.  https://www.osti.gov/servlets/purl/1570620.

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@article{osti_1570620,

  title        = {Jet splitting function in the vacuum and QCD medium},

  author       = {Li, Hai Tao and Vitev, Ivan Mateev},

  abstractNote = {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.},

  doi          = {10.22323/1.345.0077},

  journal      = {PoS Proceedings of Science},

  number       = ,

  volume       = 345,

  place        = {United States},

  year         = {Wed Apr 24 00:00:00 EDT 2019},

  month        = {Wed Apr 24 00:00:00 EDT 2019}

}

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Journal Article:

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Figures / Tables:

Figure 1: Comparison of theoretical predictions for the in-medium $z$_$g$ distribution modification to CMS measurements in Pb+Pb collisions.

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