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arXiv · 2212.08086

Are gluon showers inside a quark-gluon plasma strongly coupled? a theorist's test

Peter Arnold·Omar Elgedawy·Shahin Iqbal
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Abstract

We study whether in-medium showers of high-energy gluons can be treated as a sequence of individual splitting processes $g{\to}gg$, 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 $\alpha_{\rm s}(\mu)$ 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 $\hat q_{\rm eff}$ of the jet-quenching parameter $\hat q$.

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Peter Arnold, Omar Elgedawy, Shahin Iqbal. 2022-12-15. Are gluon showers inside a quark-gluon plasma strongly coupled? a theorist's test. https://arxiv.org/abs/2212.08086

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