On the breaking of Casimir scaling in jet quenching

We study the breaking of Casimir scaling, C F / C A , due to the evolution of jets in a hot and extended medium. By using JEWEL, a medium modified Monte Carlo event generator validated for a wide set of observables, we are able to study separately the development of quark and gluon-initiated jets pr...

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Bibliographic Details
Published inThe European physical journal. C, Particles and fields Vol. 80; no. 6; pp. 1 - 8
Main Authors Apolinário, Liliana, Barata, João, Milhano, Guilherme
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 29.06.2020
Springer
Springer Nature B.V
Springer Science + Business Media
SpringerOpen
Subjects
Astronomy
Astrophysics and Cosmology
Elementary Particles
Gluons
Hadrons
Heavy Ions
Jets
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quarks
Regular Article - Theoretical Physics
Scaling
String Theory
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Summary:We study the breaking of Casimir scaling, C F / C A , due to the evolution of jets in a hot and extended medium. By using JEWEL, a medium modified Monte Carlo event generator validated for a wide set of observables, we are able to study separately the development of quark and gluon-initiated jets produced back-to-back with a Z - boson. Focusing on the p T distribution, we conclude first that the colour charge ratio is constant but larger than Casimir scaling for high p T jets. In addition, our results seem to indicate that the medium induced cascade is more similar between quarks and gluons, thus driving the overall medium shower scaling away from the vacuum expectation. Finally, we compare our results to another Monte Carlo generator and observe the same scaling violation.
Bibliography:USDOE
de-sc001270
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-020-8133-1