# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## Novel coherence effects in initial state medium induced gluon radiation

16 Aug 2012, 16:00
2h
Regency 1/3 and Ambassador ()

### Regency 1/3 and Ambassador

Poster New theoretical developments

### Speaker

Mauricio Martinez Guerrero (Universidade de Santiago de Compostela)

### Description

Radiative interferences in the multiparton shower is the building block of QCD jet physics in vacuum. The presence of a QCD medium is expected to alter this interference pattern. We investigate color coherence effects in the medium modification to the initial state radiation in a simple setup which allows to include these effects in a clean way. We derive the medium induced gluon spectrum of an asymptotic" parton which suffers a hard scattering and subsequently crosses a QCD medium. The angular distribution of the induced gluon spectrum gets modified when one includes interference terms between the incoming and the outcoming parton at finite angle. In the soft limit, we provide a simple and intuitive probabilistic picture which could be of interest for Monte Carlo implementations. We comment on the possible phenomenological consequences of this new mechanism of soft gluon radiation in nuclear collisions.

### Primary author

Mauricio Martinez Guerrero (Universidade de Santiago de Compostela)

### Co-authors

Carlos Albert Salgado Lopez (Universidade de Santiago de Compostela (ES)) Nestor Armesto Perez (Universidade de Santiago de Compostela (ES))

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