We report a measurement of the ratio of branching fractions of the decays B(+/-) -> J/psi pi(+/-) and B(+/-) -> J/psi K(+/-) using the CDF II detector at the Fermilab Tevatron Collider. The signal from the Cabbibo-suppressed B(+/-)-> J/psi pi(+/-) decay is separated from B(+/-) -> J/psi K(+/-) using the B(+/-)-> J/psi K(+/-) invariant mass distribution and the kinematical differences of the hadron track in the two decay modes. From a sample of 220 pb(-1) of p (p) over bar collisions at root s = 1.96 TeV, we observe 91 +/- 15 B(+/-) -> J/psi pi(+/-) events together with 1883 +/- 34 B(+/-) -> J/psi K(+/-)events. The ratio of branching fractions is found to be B(B(+/-)-> J/psi pi(+/-))/B(B(+/-) -> J/psi K(+/-)) = (4.86 +/- 0.82(stat) +/- 0.15(syst))%.

A., A., J., A., T., A., T., A., M. G., A., D., A., et al. (2009). Measurement of the ratio of branching fractions B(B(+/-) -> J/psi pi(+/-))/B(B(+/-) -> J/psi K(+/-). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79(11), 112003-1-112003-8 [10.1103/PhysRevD.79.112003].

Measurement of the ratio of branching fractions B(B(+/-) -> J/psi pi(+/-))/B(B(+/-) -> J/psi K(+/-)

CIOCCI, MARIA AGNESE;
2009-01-01

Abstract

We report a measurement of the ratio of branching fractions of the decays B(+/-) -> J/psi pi(+/-) and B(+/-) -> J/psi K(+/-) using the CDF II detector at the Fermilab Tevatron Collider. The signal from the Cabbibo-suppressed B(+/-)-> J/psi pi(+/-) decay is separated from B(+/-) -> J/psi K(+/-) using the B(+/-)-> J/psi K(+/-) invariant mass distribution and the kinematical differences of the hadron track in the two decay modes. From a sample of 220 pb(-1) of p (p) over bar collisions at root s = 1.96 TeV, we observe 91 +/- 15 B(+/-) -> J/psi pi(+/-) events together with 1883 +/- 34 B(+/-) -> J/psi K(+/-)events. The ratio of branching fractions is found to be B(B(+/-)-> J/psi pi(+/-))/B(B(+/-) -> J/psi K(+/-)) = (4.86 +/- 0.82(stat) +/- 0.15(syst))%.
2009
A., A., J., A., T., A., T., A., M. G., A., D., A., et al. (2009). Measurement of the ratio of branching fractions B(B(+/-) -> J/psi pi(+/-))/B(B(+/-) -> J/psi K(+/-). PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 79(11), 112003-1-112003-8 [10.1103/PhysRevD.79.112003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/38622
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