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

B. Aubert; J.Y. Chen; R.F. Schmitz; S. Chen; L.L. Zhang; M.C. Simani; M.A. Baak; H.J. Bulten; G. Raven; P. David; N. de Groot; Z. Yu

doi:10.1103/PhysRevLett.94.041802

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

B. Aubert, J.Y. Chen, R.F. Schmitz, S. Chen, L.L. Zhang, M.C. Simani, M.A. Baak, H.J. Bulten, G. Raven, P. David, N. de Groot, Z. Yu

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Abstract

We present measurements of the branching fraction and CP-violating asymmetries in the decay B0→f0(980)K0S. The results are obtained from a data sample of 123×106 Υ(4S)→B¯¯¯B decays. From a time-dependent maximum likelihood fit, we measure the branching fraction B(B0→f0(980)(→π+π−)K0)=(6.0±0.9±0.6±1.2)×10−6, the mixing-induced CP violation parameter S=−1.62+0.56−0.51±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 f0(980) mass and width to be mf0(980)=(980.6±4.1±0.5±4.0) MeV/c2 and Γf0(980)=(43+12−9±3±9) MeV/c2, respectively.

Original language	English
Article number	041802
Journal	Physical Review Letters
Volume	94
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.94.041802
Publication status	Published - 2 Feb 2005

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@article{e05addf8a7594920b275dbc52c9942d3,

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

abstract = "We present measurements of the branching fraction and CP-violating asymmetries in the decay B0→f0(980)K0S. The results are obtained from a data sample of 123×106 Υ(4S)→B¯¯¯B decays. From a time-dependent maximum likelihood fit, we measure the branching fraction B(B0→f0(980)(→π+π−)K0)=(6.0±0.9±0.6±1.2)×10−6, the mixing-induced CP violation parameter S=−1.62+0.56−0.51±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 f0(980) mass and width to be mf0(980)=(980.6±4.1±0.5±4.0) MeV/c2 and Γf0(980)=(43+12−9±3±9) MeV/c2, respectively.",

author = "B. Aubert and J.Y. Chen and R.F. Schmitz and S. Chen and L.L. Zhang and M.C. Simani and M.A. Baak and H.J. Bulten and G. Raven and P. David and {de Groot}, N. and Z. Yu",

year = "2005",

month = feb,

day = "2",

doi = "10.1103/PhysRevLett.94.041802",

language = "English",

volume = "94",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "4",

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TY - JOUR

T1 - Measurements of the branching fraction and CP-violation asymmetries in B-0 -> f(0)(980)K-S(0)

AU - Aubert, B.

AU - Chen, J.Y.

AU - Schmitz, R.F.

AU - Chen, S.

AU - Zhang, L.L.

AU - Simani, M.C.

AU - Baak, M.A.

AU - Bulten, H.J.

AU - Raven, G.

AU - David, P.

AU - de Groot, N.

AU - Yu, Z.

PY - 2005/2/2

Y1 - 2005/2/2

N2 - We present measurements of the branching fraction and CP-violating asymmetries in the decay B0→f0(980)K0S. The results are obtained from a data sample of 123×106 Υ(4S)→B¯¯¯B decays. From a time-dependent maximum likelihood fit, we measure the branching fraction B(B0→f0(980)(→π+π−)K0)=(6.0±0.9±0.6±1.2)×10−6, the mixing-induced CP violation parameter S=−1.62+0.56−0.51±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 f0(980) mass and width to be mf0(980)=(980.6±4.1±0.5±4.0) MeV/c2 and Γf0(980)=(43+12−9±3±9) MeV/c2, respectively.

AB - We present measurements of the branching fraction and CP-violating asymmetries in the decay B0→f0(980)K0S. The results are obtained from a data sample of 123×106 Υ(4S)→B¯¯¯B decays. From a time-dependent maximum likelihood fit, we measure the branching fraction B(B0→f0(980)(→π+π−)K0)=(6.0±0.9±0.6±1.2)×10−6, the mixing-induced CP violation parameter S=−1.62+0.56−0.51±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 f0(980) mass and width to be mf0(980)=(980.6±4.1±0.5±4.0) MeV/c2 and Γf0(980)=(43+12−9±3±9) MeV/c2, respectively.

U2 - 10.1103/PhysRevLett.94.041802

DO - 10.1103/PhysRevLett.94.041802

M3 - Article

VL - 94

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 4

M1 - 041802

ER -

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

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