Coherence Effects in Multiple Medium-Induced Radiation

Proceedings

卷:10

Konrad Tywoniuk¹  Victor Vila²  CarlosA. Salgado²  Fabio Dominguez²  JoseGuilherme Milhano³ 

[1] Department of Physics and Technology, University of Bergen, Allegaten 55, 5007 Bergen, Norway;

[2] Instituto Galego de Fisica de Altas Enerxias (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, 15782 Galicia, Spain;

[3] Laboratorio de Instrumentacao e Fisica Experimental de Particulas, Av. Prof. Gama Pinto, 2, P-1649-003 Lisbon, Portugal;

关键词: Perturbative QCD;    jet physics;    jet quenching;    Quark Gluon Plasma;   

DOI  :  10.3390/proceedings2019010011

来源: DOAJ

【 摘 要 】

In the first part of this work we study the color coherence phenomenon by considering the well-known quark-antiquark antenna with an in-medium hard gluon emission and an extra very soft emission outside it—double antenna. By discussing the coherence effects in terms of the survival probability, we generalize previous studies of the antenna radiation to the case of more than two emitters. After providing support to the jet quenching picture with effective emitters in the QCD cascade, we present a novel setup of an antenna splitting inside the medium taking into account the finite formation time of the dipole, which turns out to be an important scale. We read into the role of coherence and the relevant time scales which control the scenario, while also providing theoretical support for vacuum-like emissions early in the medium. Finally, by mapping the spectrum of in-medium splittings through the corresponding kinematical Lund diagram, we appreciate regimes of a close correspondence to a semi-classical description.

【 授权许可】

Unknown