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|Title: ||Measurement of CP violating asymmetries in B(0) -> K(+)K(-)K(S)(0) decays with a time-dependent Dalitz approach|
|Issue Date: ||2012-06-11 10:43:44 (UTC+8)|
|Abstract: ||We report a measurement of CP violating asymmetries in B(0) ((B(0)) over bar) -> K(+)K(-)K(S)(0) decays with a time-dependent Dalitz approach. This analysis is based on a data sample of 657 x 10(6) B (B) over bar pairs accumulated at the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+) e(-) collider. As the result of an unbinned maximum likelihood fit to the selected candidates, the mixing-induced and direct CP violation parameters phi(eff)(1) and A(CP) are obtained for B(0) -> phi(1020)K(S)(0), B(0) -> f(0)(980)K(S)(0), and other B(0) -> K(+)K(-)K(S)(0) decays. We find four solutions that describe the data. There are phi(eff)(1) (B(0) -> phi(1020)K(S)(0)) = (32.2 +/- 9.0 +/- 2.6 +/- 1.4); phi(eff)(1)(B(0) -> phi(1020)K(S)(0)) = 26.2 +/- 8.8 +/- 2.7 +/- 1.2); phi(eff)(1)(B(0) phi(1020)K(S)(0)) = (27.3 +/- 8.6 +/- 2.8 +/- 1.3); and phi(eff)(1)(B(0) -> phi(1020)K(S)(0)) = (24.3 +/- 8.0 +/- 2.9 +/- 5.2). The values for the CP violating phase in B(0) -> phi(1020)K(S)(0) are similar, but other properties of the Dalitz plot are quite different for the four solutions. These four solutions have consistent phi(eff)(1) values for all three B-meson decay channels and none of them deviates significantly from the values measured in B -> (c (c) over bar )K(0) decays with the currently available statistics. In addition, we find no significant direct CP violation.|
|Relation: ||PHYSICAL REVIEW D|
|Appears in Collections:||[物理學系] 期刊論文|
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