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Title: Inverting the mass hierarchy of jet quenching effects with prompt b-jet substructure

Abstract

In these proceedings, we discuss the role of heavy quark mass on the formation of parton showers. Mass effects are not well understood when parton branching occurs in nuclear matter, such as the quark-gluon plasma. Recently, a theoretically consistent picture of open heavy flavor production in ultra relativistic nuclear collisions has begun to emerge based on effective theories of QCD, such as soft collinear effective theory with Glauber gluons. We show that implementation of in-medium splitting processes containing heavy quarks into next-to-leading order calculations of heavy flavor production leads to larger cross section suppression when compared to traditional energy loss phenomenology. To better constrain the important mass dependence of in-medium splitting functions, we propose a new measurement in relativistic heavy ion collisions, based on a two-prong structure inside a reconstructed heavy flavor jet. In the region of jet transverse momenta where parton mass effects are leading, we predict a unique reversal of the mass hierarchy of jet quenching effects in heavy ion relative to proton collisions. Here, we find that the momentum sharing distribution of prompt b-tagged jets is more strongly modified in comparison to the one for light jets. The work summarized here opens new directions of research onmore » the substructure of heavy flavor jets.« less

Authors:
 [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC). High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1481980
Report Number(s):
LA-UR-18-20402
Journal ID: ISSN 1742-6588
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. Conference Series
Additional Journal Information:
Journal Volume: 1070; Journal ID: ISSN 1742-6588
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Atomic and Nuclear Physics; Heavy-ion collisions, jet substructure, QCD

Citation Formats

Vitev, Ivan. Inverting the mass hierarchy of jet quenching effects with prompt b-jet substructure. United States: N. p., 2018. Web. doi:10.1088/1742-6596/1070/1/012020.
Vitev, Ivan. Inverting the mass hierarchy of jet quenching effects with prompt b-jet substructure. United States. doi:10.1088/1742-6596/1070/1/012020.
Vitev, Ivan. Wed . "Inverting the mass hierarchy of jet quenching effects with prompt b-jet substructure". United States. doi:10.1088/1742-6596/1070/1/012020. https://www.osti.gov/servlets/purl/1481980.
@article{osti_1481980,
title = {Inverting the mass hierarchy of jet quenching effects with prompt b-jet substructure},
author = {Vitev, Ivan},
abstractNote = {In these proceedings, we discuss the role of heavy quark mass on the formation of parton showers. Mass effects are not well understood when parton branching occurs in nuclear matter, such as the quark-gluon plasma. Recently, a theoretically consistent picture of open heavy flavor production in ultra relativistic nuclear collisions has begun to emerge based on effective theories of QCD, such as soft collinear effective theory with Glauber gluons. We show that implementation of in-medium splitting processes containing heavy quarks into next-to-leading order calculations of heavy flavor production leads to larger cross section suppression when compared to traditional energy loss phenomenology. To better constrain the important mass dependence of in-medium splitting functions, we propose a new measurement in relativistic heavy ion collisions, based on a two-prong structure inside a reconstructed heavy flavor jet. In the region of jet transverse momenta where parton mass effects are leading, we predict a unique reversal of the mass hierarchy of jet quenching effects in heavy ion relative to proton collisions. Here, we find that the momentum sharing distribution of prompt b-tagged jets is more strongly modified in comparison to the one for light jets. The work summarized here opens new directions of research on the substructure of heavy flavor jets.},
doi = {10.1088/1742-6596/1070/1/012020},
journal = {Journal of Physics. Conference Series},
number = ,
volume = 1070,
place = {United States},
year = {2018},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
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Figures / Tables:

Figure 1 Figure 1: Illustration of parton shower formation in the QGP produced in ultrarelativistic nuclear collisions.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.