# On angular ordering in medium-induced radiation

Source: [On angular ordering in medium-induced radiation](<https://www.sota2.com/research/paper/68fa2a2a1e209131ce83b262>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T13:23:18.398Z

Authors: K. Tywoniuk

Published: 2011-02-12T16:55:08.000Z

## Abstract

Medium-induced gluon radiation gives rise to the strong energy-loss observed in single-hadron spectra in heavy-ion collisions. Its angular structure, leading e.g. to intra-jet correlations, is only known for the one-gluon inclusive case. In the vacuum, properties such as angular ordering appear when considering less inclusive distributions due to destructive interference effects. We present a calculation which takes into account interference effects in a medium for a setup in which we consider gluon radiation off a quark-antiquark pair with a given opening angle. Surprisingly, computing the spectrum at leading-log accuracy we find that an ordering exists which is exactly opposite from that in the vacuum. We estimate the magnitude of the effect along with a discussion of the implications of such "anti-angular ordering" on jet physics in heavy-ion collisions.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1102.2528>)

[PDF](<https://arxiv.org/pdf/1102.2528.pdf>)