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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

Matching the electroweak penguins q7, q8 and spectral correlators

Author

  • Johan Bijnens
  • Elvira Gámiz
  • Joaquim Prades

Summary, in English

Exact analytical expressions for the ∆S = 1 coupling Im GE in terms of observable spectral functions are given. This coupling determines the size of the ∆I = 3/2 contribution to ε . We show analytically how the scheme-dependence and scale dependences vanish to all orders in 1/Nc and NLO in αS explicitly both for Q7 and Q8 . Numerical results are derived for both Q7 and Q8 from the τ-data and known results on the scalar spectral functions. In particular we study the effect of all higher dimension operators. The coefficients of the leading operators in the OPE of the needed correlators are derived to NLO in αS .

Department/s

  • Department of Astronomy and Theoretical Physics

Publishing year

2001-10-16

Language

English

Publication/Series

Journal of High Energy Physics

Volume

2001

Issue

JHEP10(2001)

Document type

Journal article

Publisher

Springer

Topic

  • Other Physics Topics

Keywords

  • Chiral Lagrangians
  • CP violation
  • Kaon Physics
  • QCD

Status

Published

ISBN/ISSN/Other

  • ISSN: 1029-8479