Coulomb gluons will generally destroy coherence
arXiv:2109.03665 · doi:10.1007/JHEP12(2021)084
Abstract
Coherence violation is an interesting and counter-intuitive phenomenon in QCD. We discuss the circumstances under which violation occurs in observables sensitive to soft radiation and arrive at the conclusion that almost all such observables at hadron colliders will violate coherence to some degree. We illustrate our discussion by considering the gaps-between-jets observable, where coherence violation is super-leading, then we generalise to other observables, including precise statements on the logarithmic order of coherence violation.
arXiv comment11 pages, v2 accepted for publication in JHEP, v2 contains additional references and minor edits, v3 corrects an error relating to the W/Z pT distribution
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