Jets in QCD media: from color coherence to decoherence

We investigate soft gluon radiation off a quark-antiquark antenna in both color singlet and octet configurations traversing a dense medium. We demonstrate that, in both cases, multiple scatterings lead to a gradual decoherence of the antenna radiation as a function of the medium density. In particul...

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Bibliographic Details
Published in:arXiv.org 2011-02
Main Authors: Mehtar-Tani, Y, Salgado, C A, Tywoniuk, K
Format: Article
Language:English
Subjects:
Antennas
Color
Emitters
Ionic collisions
Quantum chromodynamics
Quarks
Online Access:Get full text
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Summary:We investigate soft gluon radiation off a quark-antiquark antenna in both color singlet and octet configurations traversing a dense medium. We demonstrate that, in both cases, multiple scatterings lead to a gradual decoherence of the antenna radiation as a function of the medium density. In particular, in the limit of an completely opaque medium, total decoherence is obtained, i.e., the quark and the antiquark radiate as independent emitters in vacuum, thus losing memory of their origin. We comment on possible implications on intrajet observables in heavy-ion collisions.
ISSN:2331-8422
DOI:10.48550/arxiv.1102.4317