Seminar in Hadronic Physics

Are in-medium quark-gluon showers strongly coupled?

Shahin Iqbal

National Centre for Physics, Pakistan

We study whether in-medium showers of high-energy quarks and gluons can be treated as a sequence of individual splitting processes or whether there is significant quantum overlap between where one splitting ends and the next begins. Accounting for the Landau-Pomeranchuk-Migdal (LPM) effect, we calculate such overlap effects to leading order in high-energy α_s(μ) for the simplest theoretical situation. We investigate a measure of overlap effects that is independent of physics that can be absorbed into an effective value q̂_eff of the jet-quenching parameter q̂.