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B and B s decay constants from moments of finite energy sum rules in QCD

  • F. Bodí-Esteban
  • J. BordesEmail author
  • J. Peñarrocha
theoretical physics

Abstract.

We use an appropriate combination of moments of finite energy sum rules in QCD in order to compute the B q -meson decay constants f B and \(f_{B_s}\). We perform the calculation using a two-loop computation of the imaginary part of the pseudoscalar two point function in terms of the running bottom quark mass. The results are stable against the so-called QCD duality threshold, and they are in agreement with the estimates obtained from Borel transform QCD sum rules and lattice computations.

Keywords

Field Theory Elementary Particle Quantum Field Theory Imaginary Part Quark Mass 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Departamento de Física Teórica-IFICUniversitat de ValenciaBurjassot-ValenciaSpain

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