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Infrared-safe definition of jet flavour

  • Theoretical Physics
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Abstract

It is common, in both theoretical and experimental studies, to separately discuss quark and gluon jets. However, even at parton level, widely-used jet algorithms fail to provide an infrared-safe way of making this distinction. We examine the origin of the problem and propose a solution in terms of a new “flavour-kt” algorithm. As well as being of conceptual interest this can be a powerful tool when combining fixed-order calculations with multi-jet resummations and parton showers. It also has applications to studies of heavy-quark jets.

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Authors and Affiliations

  1. Centre for Mathematical Sciences, DAMTP, Cambridge, CB3 0WA, UK

    A. Banfi

  2. Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK

    A. Banfi

  3. University of Milano–Bicocca and INFN Sezione di Milano, Milano, Italy

    A. Banfi

  4. LPTHE: Université Pierre et Marie Curie – Paris 6; Université Denis Diderot – Paris 7; CNRS, 75252, Paris, France

    G.P. Salam

  5. Theory Group, Fermilab, P.O. Box 500, Batavia, IL, USA

    G. Zanderighi

  6. Theory Division, Physics Department, CERN, 1211, Geneva 23, Switzerland

    G. Zanderighi

Authors
  1. A. Banfi
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  2. G.P. Salam
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  3. G. Zanderighi
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Correspondence to A. Banfi.

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Banfi, A., Salam, G. & Zanderighi, G. Infrared-safe definition of jet flavour. Eur. Phys. J. C 47, 113–124 (2006). https://doi.org/10.1140/epjc/s2006-02552-4

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  • DOI: https://doi.org/10.1140/epjc/s2006-02552-4

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