Elsevier

Nuclear Physics B

Volume 355, Issue 1, 13 May 1991, Pages 54-81
Nuclear Physics B

One- and two-particle distributions at small x in QCD jets

https://doi.org/10.1016/0550-3213(91)90302-EGet rights and content

Abstract

We present QCD predictions of the one- and two-particle inclusive momentum distributions in jets, for small values of the momentum fraction x = ϱhadron/Ejet. The predictions are based on calculations of the relevant cumulants and correlation coefficients including next-to-leading corrections, which are of relative order √αs. To assess the possible effects of further higher-order and non-perturbative corrections, the analytical results are compared with those of the Monte Carlo simulation HERWIG, which contains the same perturbative physics combined with a phenomenological model of the non-perturbative hadronization process. We also compare the predicted one-particle distribution in quark jets with experimental data from LEP.

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Research supported in part by the UK Science and Engineering Research Council and in part by the Croucher Foundation.

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