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Observation of B_0^s \rightarrow J/ \psiK^* (892)^0 and B_s^0 \rightarrow J/\psiK^0_s decays

Abstract: We report the first observation of two Cabibbo-suppressed decay modes of the B0s meson. Using a sample of p¯p collisions at ?s=1.96??TeV corresponding to 5.9?fb?1 of integrated luminosity collected with the CDF II, the collider detector at the Fermilab Tevatron, we search for new B0s decay modes in a sample of events containing J/???+?? decays. We reconstruct a B0s?J/?K?(892)0 signal with K?(892)0?K+??, observing a yield of 151±25 events with a statistical significance of 8.0?. We also reconstruct a B0s?J/?K0S signal with K0S??+??, observing a yield of 64±14 events with a statistical significance of 7.2?. From these yields, we extract the branching ratios B(B0s?J/?K?(892)0)=(8.3±3.8)×10?5 and B(B0s?J/?K0)=(3.5±0.8)×10?5, where statistical, systematic, and fragmentation-fraction uncertainties are included in the combined uncertainty.

Autoría: Aaltonen T., Ávarez González B., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Apresyan A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bauer G., Bedeschi F., Beecher D., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Binkley M.,

Fuente: Physical Review D - Particles, Fields, Gravitation and Cosmology, 2011, 83(5), 052012

Editorial: American Physical Society

Fecha de publicación: 01/03/2011

Nº de páginas: 11

Tipo de publicación: Artículo de Revista

DOI: 10.1103/PhysRevD.83.052012

ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

Url de la publicación: https://doi.org/10.1103/PhysRevD.83.052012

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