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QSSR estimate of the B$_{B}$ parameter at next-to-leading order
We compute the leading .alpha.sub(s) corrections to the two-point correlator of the $O_{\Delta B=2}$ operator which controls the B.sup(0) B.bar.sup(0) mixing. Using this result within the QCD spectral sum rules approach and some phenomenologically reasonable assumptions in the parametrization of the...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1994
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/0370-2693(94)90739-0 http://cds.cern.ch/record/259852 |
| Sumario: | We compute the leading .alpha.sub(s) corrections to the two-point correlator of the $O_{\Delta B=2}$ operator which controls the B.sup(0) B.bar.sup(0) mixing. Using this result within the QCD spectral sum rules approach and some phenomenologically reasonable assumptions in the parametrization of the spectral function, we conclude that the vacuum saturation values $B_B\simeq B_{B^*}\simeq 1$ are satisfied within 15\%. |
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