This paper reports an updated measurement of the standard model CP violation parameter sin 2 beta using the CBF Detector at Fermilab. The entire run I data sample of 110 pb(-1) of proton-antiproton collisions at root s =1.8 TeV is used to identify a signal sample of similar to 400 B-->J/psi K-S(o) events, where J/psi --> mu(+)mu(-) and K-S(o) - pi(+) pi(-). The flavor of the neutral B meson is identified at the time of production by combining information from three tagging algorithms: a same-side tag, a jet-charge tag, and a soft-lepton tag. A maximum likelihood fitting method is used to determine sin 2 beta=0.79(-0.44)(+0.41)(stat + syst). This value of sin 2 beta is consistent with the standard model prediction, based upon existing measurements, of a large positive CP-violating asymmetry in this decay mode.

T., A., H., A., A., A., M. G., A., P., A., S. R., A., et al. (2000). Measurement of sin 2 beta from B -> J/psi K-S(0) with the CDF detector. PHYSICAL REVIEW D, 61(7) [10.1103/PhysRevD.61.072005].

Measurement of sin 2 beta from B -> J/psi K-S(0) with the CDF detector

PAOLETTI, RICCARDO;
2000-01-01

Abstract

This paper reports an updated measurement of the standard model CP violation parameter sin 2 beta using the CBF Detector at Fermilab. The entire run I data sample of 110 pb(-1) of proton-antiproton collisions at root s =1.8 TeV is used to identify a signal sample of similar to 400 B-->J/psi K-S(o) events, where J/psi --> mu(+)mu(-) and K-S(o) - pi(+) pi(-). The flavor of the neutral B meson is identified at the time of production by combining information from three tagging algorithms: a same-side tag, a jet-charge tag, and a soft-lepton tag. A maximum likelihood fitting method is used to determine sin 2 beta=0.79(-0.44)(+0.41)(stat + syst). This value of sin 2 beta is consistent with the standard model prediction, based upon existing measurements, of a large positive CP-violating asymmetry in this decay mode.
2000
T., A., H., A., A., A., M. G., A., P., A., S. R., A., et al. (2000). Measurement of sin 2 beta from B -> J/psi K-S(0) with the CDF detector. PHYSICAL REVIEW D, 61(7) [10.1103/PhysRevD.61.072005].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/40245
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