# POETIC 8

19-23 March 2018
Other Institutes
Europe/Berlin timezone

## Coherence effects in a QCD parton cascade

20 Mar 2018, 16:30
25m

### Speaker

Víctor Vila (Universidade de Santiago de Compostela)

### Description

We study the color coherence phenomenon starting from the original quark-antiquark antenna laboratory in the presence of a medium. Measurements of jet substructure shed light on the character of the jet interactions with the dense medium formed in the collisions, which can break the intrajet color coherence leading to interesting phenomena. Describing the decoherence of the $q \bar{q}$ pair through the survival probability, we extract some interesting interpretations in the large-$N_{c}$ limit. We extrapolate previous analyzes of the antenna radiation to the case of two hard splittings inside the medium, and prove that this generalization keeps back the picture of jet quenching with effective emitters in the QCD parton cascade. With the purpose of considering a more realistic setting, we address a similar configuration in which a quark-gluon antenna with finite formation time propagates through the medium. We study the in-medium QCD branching, which is also important to understand the jet substructure in $eA$ collisions. Finally, we discuss the role of color coherence in these configurations.

### Primary author

Víctor Vila (Universidade de Santiago de Compostela)

### Co-authors

Fabio Dominguez (Universidade de Santiago de Compostela) Carlos Albert Salgado Lopez (Universidade de Santiago de Compostela (ES))