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))%.

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

CIOCCI, MARIA AGNESE;DONATI, SIMONE;
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., Abulencia; J., Adelman; T., Affolder; T., Akimoto; M. G., Albrow; D., Ambrose; S., Amerio; D., Amidei; A., Anastassov; K., Anikeev; A., Annovi; J....espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/828695
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 3
social impact