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Penguins with Charm and Quark-Hadron Duality
The integrated branching fraction of the process $B\to X_s l^+l^-$ is dominated by resonance background from narrow charmonium states, such as $B\to X_s\psi\to X_s l^+l^-$, which exceeds the non-resonant charm-loop contribution by two orders of magnitude. The origin of this fact is discussed in view...
| Autores principales: | , , , |
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| Lenguaje: | eng |
| Publicado: |
2009
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1140/epjc/s10052-009-1028-9 http://cds.cern.ch/record/1163895 |