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Measurements of the branching fraction and CP-violation asymmetries in B-0 -> f(0)(980)K-S(0)

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Gaillard, JM; Hicheur, A; Karyotakis, Y; ... BaBar Collaboration; + view all (2005) Measurements of the branching fraction and CP-violation asymmetries in B-0 -> f(0)(980)K-S(0). PHYS REV LETT , 94 (4) , Article 041802. 10.1103/PhysRevLett.94.041802. Green open access

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Abstract

We present measurements of the branching fraction and CP-violating asymmetries in the decay B-0-->f(0)(980)K-S(0). The results are obtained from a data sample of 123x10(6) Y(4S)-->B (B) over bar decays. From a time-dependent maximum likelihood fit, we measure the branching fraction B(B-0-->f(0)(980)(-->pi(+)pi(-))K-0)=(6.0+/-0.9+/-0.6+/-1.2)x10(-6), the mixing-induced CP violation parameter S=-1.62(-0.51)(+0.56)+/-0.09+/-0.04, and the direct CP violation parameter C=0.27+/-0.36+/-0.10+/-0.07, where the first errors are statistical, the second systematic, and the third due to model uncertainties. We measure the f(0)(980) mass and width to be m(f0)(980)=(980.6+/-4.1+/-0.5+/-4.0) MeV/c(2) and Gamma(f0)(980)=(43(-9)(+12)+/-3+/-9) MeV/c(2), respectively.

Type: Article
Title: Measurements of the branching fraction and CP-violation asymmetries in B-0 -> f(0)(980)K-S(0)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.94.041802
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.94.041802
Language: English
Additional information: © 2005 The American Physical Society
Keywords: B-DECAYS, PHYSICS
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/1303700
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