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Measurement of the time-dependent CP asymmetry in the B-0 ->phi K-0 decay

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, JM; Hicheur, A; Karyotakis, Y; ... BABAR Collaboration; + view all (2004) Measurement of the time-dependent CP asymmetry in the B-0 ->phi K-0 decay. PHYS REV LETT , 93 (7) , Article 071801. 10.1103/PhysRevLett.93.071801. Green open access

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Abstract

We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay B-0-->phiK(0). We use a sample of approximately 114x10(6) B-meson pairs taken at the Y(4S) resonance with the BABAR detector at the PEP-II B-meson factory at SLAC. We reconstruct the CP eigenstates phiK(S)(0) and phiK(L)(0), where phi-->K+K-, K-S(0)-->pi(+)pi(-), and K-L(0) is observed via its hadronic interactions. The other B meson in the event is tagged as either a B-0 or (B) over bar (0) from its decay products. The values of the CP-violation parameters are S-phiK=0.47+/-0.34(stat)(-0.06)(+0.08)(syst) and C-phiK=0.01+/-0.33(stat)+/-0.10(syst).

Type: Article
Title: Measurement of the time-dependent CP asymmetry in the B-0 ->phi K-0 decay
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.93.071801
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.93.071801
Language: English
Additional information: The American Physical Society
Keywords: B-MESON DECAYS, 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/1303674
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