We report the first observation of two Cabibbo-suppressed decay modes of the B-s(0) meson. Using a sample of p (p) over bar collisions at root 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 B-s(0) decay modes in a sample of events containing J/psi -> mu(+)mu(-) decays. We reconstruct a B-s(0) -> J/psi K*(892)(0) signal with K*(892)(0) -> K(+) pi(-), observing a yield of 151 +/- 25 events with a statistical significance of 8.0 sigma. We also reconstruct a B-s(0) -> J/psi K-s(0) signal with K-s(0) -> pi(+)pi(-) , observing a yield of 64 +/- 14 events with a statistical significance of 7.2 sigma. From these yields, we extract the branching ratios B(B-s(0) -> J/psi K* (892)(0))= (8.3 +/- 3.8) x10(-5) and B(B-s(0) -> J/psi K-0) = (3.5 +/- 0.8) x10(-5), where statistical, systematic, and fragmentation-fraction uncertainties are included in the combined uncertainty.

T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Observation of B-s(0) -> J/psi K*(892)(0) and B-s(0) -> J/psi K-s(0) decays. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 83(5), 052012-1-052012-11 [10.1103/PhysRevD.83.052012].

Observation of B-s(0) -> J/psi K*(892)(0) and B-s(0) -> J/psi K-s(0) decays

BARRIA, PATRIZIA;GAROSI, PAOLA;RUFFINI, FABRIZIO;SCRIBANO, ANGELO;SQUILLACIOTI, PAOLA;
2011-01-01

Abstract

We report the first observation of two Cabibbo-suppressed decay modes of the B-s(0) meson. Using a sample of p (p) over bar collisions at root 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 B-s(0) decay modes in a sample of events containing J/psi -> mu(+)mu(-) decays. We reconstruct a B-s(0) -> J/psi K*(892)(0) signal with K*(892)(0) -> K(+) pi(-), observing a yield of 151 +/- 25 events with a statistical significance of 8.0 sigma. We also reconstruct a B-s(0) -> J/psi K-s(0) signal with K-s(0) -> pi(+)pi(-) , observing a yield of 64 +/- 14 events with a statistical significance of 7.2 sigma. From these yields, we extract the branching ratios B(B-s(0) -> J/psi K* (892)(0))= (8.3 +/- 3.8) x10(-5) and B(B-s(0) -> J/psi K-0) = (3.5 +/- 0.8) x10(-5), where statistical, systematic, and fragmentation-fraction uncertainties are included in the combined uncertainty.
2011
T., A., B., Á.G., S., A., D., A., A., A., A., A., et al. (2011). Observation of B-s(0) -> J/psi K*(892)(0) and B-s(0) -> J/psi K-s(0) decays. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 83(5), 052012-1-052012-11 [10.1103/PhysRevD.83.052012].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/40259
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