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

Aaltonen, T; Adelman, J; Akimoto, T; Albrow, MG; Gonzalez, BA; Amerio, S; Amidei, D; ... CDF Collaboration, ; + view all (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) , Article 161802. 10.1103/PhysRevLett.100.161802. Green open access

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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.

Type: Article
Title: First flavor-tagged determination of bounds on mixing-induced CP violation in B-s(0)-> J/psi phi decays
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.100.161802
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.100.161802
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: DECAYS, MESON
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/143051
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