On the breaking of Casimir scaling in jet quenching

被引：7
作者：
Apolinario, Liliana [1 ,2 ]
Barata, Joao [3 ,4 ]
Milhano, Guilherme [1 ,2 ]
机构：
[1] LIP, Av Prof Gama Pinto 2, P-1649003 Lisbon, Portugal
[2] Univ Lisbon, Inst Super Tecn IST, Av Rovisco Pais 1, P-1049001 Lisbon, Portugal
[3] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias IGFAE, Galicia 15782, Spain
[4] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA
来源：
EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 06期
基金：
欧盟地平线“2020”;
关键词：
RADIATIVE ENERGY-LOSS; PB-PB COLLISIONS; QUARKS;
D O I：
10.1140/epjc/s10052-020-8133-1
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
We study the breaking of Casimir scaling, CF/CA, 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 pT distribution, we conclude first that the colour charge ratio is constant but larger than Casimir scaling for high pT 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.
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页数：8
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