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-+/-) / Abulencia, A., Adelman, J., Affolder, T., Akimoto, T., Albrow, M.g., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., Annovi, A., Antos, J., Aoki, M., Apollinari, G., Arguin, J.f., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Azfar, F., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 79:(2009). [10.1103/physrevd.79.112003]

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

DE CECCO, Sandro;DIONISI, Carlo;GIAGU, Stefano;MARGAROLI, Fabrizio;IORI, Maurizio;LOVERRE, Pier Ferruccio;MESSINA, Andrea;
2009

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
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the ratio of branching fractions B(B-+/- -> J/psi pi(+/-))/B(B-+/- -> J/psi K-+/-) / Abulencia, A., Adelman, J., Affolder, T., Akimoto, T., Albrow, M.g., Ambrose, D., Amerio, S., Amidei, D., Anastassov, A., Anikeev, K., Annovi, A., Antos, J., Aoki, M., Apollinari, G., Arguin, J.f., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Azfar, F., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 79:(2009). [10.1103/physrevd.79.112003]
File allegati a 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/11573/227973
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 3
social impact