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The lambda-measure and the generalised dipoles in the Lund model

På svenska

Author

  • Bo Andersson
  • Sandipan Mohanty
  • Fredrik Söderberg

Summary, in English

We demonstrate that the multiple gluon emission phase space in the dipole cascade model has a strong linear correlation with the number of gluons emitted. The number of gluons per unit available phase space at a certain resolution scale is found to be remarkably independent of the cms energy and global event properties like thrust, and even changes in the ordering variable or resolution scale. We show that the distribution of sizes of gluon-gluon dipoles in a parton cascade has stability properties which are sufficient to account for those of the phase space variable. We observe that certain more abstract entities, defined in the context of hadronisation and related to the gluon emission phase space, share those properties of colour dipoles and name them generalised dipoles. We also present an analytical model to qualitatively describe our findings. (C) 2002 Elsevier Science B.V. All rights reserved.

Publishing year

2002

Language

English

Pages

102-126

Publication/Series

Nuclear Physics, Section B

Volume

646

Issue

1-2

Document type

Journal article

Publisher

North-Holland

Topic

  • Subatomic Physics

Keywords

  • Lund model
  • dipole cascade model
  • lambda-measure
  • l-measure
  • generalised dipole
  • QCD

Status

Published

ISBN/ISSN/Other

  • ISSN: 0550-3213