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On large angle multiple gluon radiation

High Energy Physics - Phenomenology 2016-09-06 v1

Abstract

Jet shape observables which involve measurements restricted to a part of phase space are sensitive to multiplication of soft gluon with large relative angles and give rise to specific single logarithmically enhanced (SL) terms (non-global logs). We consider associated distributions in two variables which combine measurement of a jet shape V in the whole phase space (global) and that of the transverse energy flow away from the jet direction, Eout (non-global). We show that associated distributions factorize into the global distribution in V and a factor that takes into account SL contributions from multi-gluon ``hedgehog'' configurations in all orders. The latter is the same that describes the single-variable Eout distribution, but evaluated at a rescaled energy VQ.

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Cite

@article{arxiv.hep-ph/0303101,
  title  = {On large angle multiple gluon radiation},
  author = {Yu. L. Dokshitzer and G. Marchesini},
  journal= {arXiv preprint arXiv:hep-ph/0303101},
  year   = {2016}
}

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16 pages