Int. Conference on the Initial Stages of High-Energy Nuclear Collisions

Coherence effects between the initial and final state radiation in a dense QCD medium

10 Sept 2013, 15:30

30m

Hotel Louxo - Illa da Toxa - Galicia (Spain)

Partons in high energy hadronic and nuclear collisions (III)

Speaker

Mauricio Martinez Guerrero (Universidade de Santiago de Compostela)

Description

In this work we investigate medium modifications to the interference pattern between initial and final state radiation. We compute single gluon production off a highly energetic parton that undergoes a hard scattering and subsequently crosses a dense QCD medium of finite size. We extend our previous studies obtained at first order in opacity by providing general results for multiple soft scatterings and their specific formulation within the harmonic oscillator approximation. We study the interplay of the two relevant scales of the problem: the medium length L and the decorrelation time of the gluon due to the medium $\tau_f$. This interplay gives origin to two different asymptotic limits of the gluon spectrum: the coherent ($\tau_f\gg L^+$) and incoherent regime ($\tau_f\ll L^+$). We discuss the main characteristics of each regime. We comment on possible phenomenological consequences of this setup in high-energy nuclear collisions.

Presentation materials

Slides

Martinez.pdf