Links

Tools

Export citation

Search in Google Scholar

Measurement of the ratio of branching fractionsB(B±→J/ψπ±)/B(B±→J/ψK±)

Journal article published in 2009 by A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, D. Ambrose, S. Amerio, D. Amidei, A. Anastassov, K. Anikeev, A. Annovi, J. Antos, M. Aoki, G. Apollinari, J.-F. Arguin and other authors.
This paper is available in a repository.
This paper is available in a repository.

Full text: Download

Question mark in circle
Preprint: policy unknown
Question mark in circle
Postprint: policy unknown
Question mark in circle
Published version: policy unknown

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))%.