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Theory and phenomenology of non-global logarithms

Authors
  • Appleby, R. B.
  • Salam, G. P.
Type
Preprint
Publication Date
May 21, 2003
Submission Date
May 21, 2003
Identifiers
arXiv ID: hep-ph/0305232
Source
arXiv
License
Unknown
External links

Abstract

We discuss the theoretical treatment of non-global observables, those quantities that are sensitive only to radiation in a restricted region of phase space, and describe how large `non-global' logarithms arise when we veto the energy flowing into the restricted region. The phenomenological impact of non-global logarithms is then discussed, drawing on examples from event shapes in DIS and energy-flow observables in 2-jet systems. We then describe techniques to reduce the numerical importance of non-global logarithms, looking at clustering algorithms in energy flow observables and the study of associated distribution of multiple observables.

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