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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 | |||
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Este documento está disponible también en : http://hdl.handle.net/10550/42725 |
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| 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. | |||
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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 |
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| http://dx.doi.org/10.1140/epjc/s2004-02020-3 |
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