This Letter describes the first determination of bounds on the CP-violation parameter 2 beta(s) using B-s(0) decays in which the flavor of the bottom meson at production is identified. The result is based on approximately 2000 B-s(0) -> J/psi phi decays reconstructed in a 1.35 fb(-1) data sample collected with the CDF II detector using p (p) over bar collisions produced at the Fermilab Tevatron. We report confidence regions in the two-dimensional space of 2 beta(s) and the decay-width difference Delta Gamma. Assuming the standard model predictions of 2 beta(s) and Delta Gamma, the probability of a deviation as large as the level of the observed data is 15%, corresponding to 1.5 Gaussian standard deviations.

T., A., J., A., T., A., M., A., B., Á.G., S., A., et al. (2008). First flavor-tagged determination of bounds on mixing-induced CP violation in B-s(0)-> J/psi phi decays. PHYSICAL REVIEW LETTERS, 100(16), 161802-1-161802-7 [10.1103/PhysRevLett.100.161802].

First flavor-tagged determination of bounds on mixing-induced CP violation in B-s(0)-> J/psi phi decays

CATASTINI, PIERLUIGI;GIUNTA, MICHELE;SCRIBANO, ANGELO;SQUILLACIOTI, PAOLA;TURINI, NICOLA;
2008-01-01

Abstract

This Letter describes the first determination of bounds on the CP-violation parameter 2 beta(s) using B-s(0) decays in which the flavor of the bottom meson at production is identified. The result is based on approximately 2000 B-s(0) -> J/psi phi decays reconstructed in a 1.35 fb(-1) data sample collected with the CDF II detector using p (p) over bar collisions produced at the Fermilab Tevatron. We report confidence regions in the two-dimensional space of 2 beta(s) and the decay-width difference Delta Gamma. Assuming the standard model predictions of 2 beta(s) and Delta Gamma, the probability of a deviation as large as the level of the observed data is 15%, corresponding to 1.5 Gaussian standard deviations.
T., A., J., A., T., A., M., A., B., Á.G., S., A., et al. (2008). First flavor-tagged determination of bounds on mixing-induced CP violation in B-s(0)-> J/psi phi decays. PHYSICAL REVIEW LETTERS, 100(16), 161802-1-161802-7 [10.1103/PhysRevLett.100.161802].
File in questo prodotto:
File Dimensione Formato  
PhysRevLett.100.161802.pdf

non disponibili

Tipologia: Post-print
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 211.82 kB
Formato Adobe PDF
211.82 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/11365/25832
 Attenzione

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