Color coherence in multiple antenna medium radiation

Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions 2016

Domínguez, Fabio^1 ; Salgado, Carlos A^1 ; Vila, Víctor^1

Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Galicia

E-15706, Spain^1

关键词: Coherence effects;    Color coherence;    Jet quenching;    Multiple antenna;    Opening angle;    Parton cascade;    Quark antiquark pair;    Survival probabilities;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/832/1/012008/pdf
DOI  :  10.1088/1742-6596/832/1/012008

来源: IOP

【 摘 要 】

We present the configuration in which a quark-antiquark pair with a fixed opening angle emits a hard gluon inside a medium, and an additional very soft emission afterwards (double antenna). We discuss the coherence effects in terms of the survival probability, which describes the interaction of the qg system with the medium. We generalize previous studies of the antenna radiation to the case of more than two emitters and prove that this generalization provides further support to the picture of jet quenching with effective emitters in the parton cascade.