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The European Physical Journal C

, Volume 61, Issue 3, pp 439–449 | Cite as

Penguins with charm and quark–hadron duality

  • M. Beneke
  • G. Buchalla
  • M. Neubert
  • C. T. Sachrajda
Regular Article - Theoretical Physics

Abstract

The integrated branching fraction of the process BX s l + l is dominated by resonance background from narrow charmonium states, such as BX s ψX s l + l , which exceeds the non-resonant charm-loop contribution by two orders of magnitude. The origin of this fact is discussed in view of the general expectation of quark–hadron duality. The situation in BX s l + l is contrasted with charm-penguin amplitudes in two-body hadronic B decays of the type Bπ π, for which it is demonstrated that resonance effects and the potentially non-perturbative \(c\bar{c}\) threshold region do not invalidate the standard picture of QCD factorization. This holds irrespective of whether the charm quark is treated as a light or a heavy quark.

Keywords

Operator Product Expansion Charm Quark Resonance Contribution Hadron Duality Penguin Contribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2009

Authors and Affiliations

  • M. Beneke
    • 1
    • 2
  • G. Buchalla
    • 3
  • M. Neubert
    • 4
  • C. T. Sachrajda
    • 5
  1. 1.Institut für Theoretische Physik ERWTH Aachen UniversityAachenGermany
  2. 2.CERN Theory DepartmentGenèveSwitzerland
  3. 3.Fakultät für Physik, Arnold Sommerfeld Center for Theoretical PhysicsLudwig-Maximilians-Universität MünchenMünchenGermany
  4. 4.Institut für Physik (THEP)Johannes Gutenberg-UniversitätMainzGermany
  5. 5.School of Physics and AstronomyUniversity of SouthamptonSouthamptonUK

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