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Improved measurement of CP asymmetries in B-0 ->(c(c)over-bar)K0((*)) decays

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, JM; Hicheur, A; Karyotakis, Y; ... BaBar Collaboration; + view all (2005) Improved measurement of CP asymmetries in B-0 ->(c(c)over-bar)K0((*)) decays. PHYS REV LETT , 94 (16) , Article 161803. 10.1103/PhysRevLett.94.161803. Green open access

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Abstract

We present results on time-dependent CP asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 227x10(6) Upsilon(4S)-> B (B) over bar decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The amplitude of the CPasymmetry, sin2 beta in the standard model, is derived from decay-time distributions from events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B-0 or <<(B)over bar>(0) from its decay products. We measure sin2 beta=0.722 +/- 0.040(stat)+/- 0.023(syst) in agreement with the standard model expectation.

Type: Article
Title: Improved measurement of CP asymmetries in B-0 ->(c(c)over-bar)K0((*)) decays
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.94.161803
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.94.161803
Language: English
Additional information: © 2005 The American Physical Society
Keywords: VIOLATION
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1303711
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