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Coherent gluon radiation: beyond leading-log accuracy
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Journal Article
Coherent gluon radiation: beyond leading-log accuracy
2024
Overview
A
bstract
Results are presented for the medium-induced, soft coherent radiation spectrum for all 2 → 2 partonic channels in QCD, at leading-order in
α
s
but beyond leading logarithmic accuracy. The general formula is valid in the full kinematic range of the underlying process, and reduces to previous results in special cases. The soft gluon radiation spectrum is expressed in terms of the
color density matrix
specific to each channel, quantifying the entanglement between the color components of the 2 → 2 production amplitude. Beyond the leading logarithm, the spectrum depends explicitly on the off-diagonal elements of this matrix, owing to the soft gluon’s ability to probe the internal color structure of the parton pair.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V,Springer,Springer Nature,SpringerOpen
