B and B(S) decay constants from moments of finite energy sum rules in QCD
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B and B(S) decay constants from moments of finite energy sum rules in QCD

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B and B(S) decay constants from moments of finite energy sum rules in QCD

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Bodí Esteban, Fernando; Bordes Villagrasa, José M.; Peñarrocha Gantes, José Antonio
This document is a artículoDate2004

Este documento está disponible también en : http://hdl.handle.net/10550/42725
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 TeX . 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.

    Bodí Esteban, Fernando Bordes Villagrasa, José M. Peñarrocha Gantes, José Antonio 2004 B and B(S) decay constants from moments of finite energy sum rules in QCD European Physical Journal C 38 3 277 281
http://dx.doi.org/10.1140/epjc/s2004-02020-3

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