Measurement Of Cp Asymmetries In B0 Ks Pi0 Pi0 Decays
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Measurement of CP Asymmetries in B0-]Ks Pi0 Pi0 Decays
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The authors present a preliminary measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state K{sub S}{sup 0}{pi}{sup 0}{pi}{sup 0}, with K{sub S}{sup 0} {yields} {pi}{sup +}{pi}{sup -} and {pi}{sup 0} {yields} {gamma}{gamma}. They use a sample of approximately 227 million B-meson pairs recorded at the {Upsilon}(4S) resonance by the BABAR detector at the PEP-II B-Factory at SLAC. From a maximum likelihood fit they extract the mixing-induced CP-violation parameter S{sub K{sub S}{sup 0}{pi}{sup 0}{pi}{sup 0}} = 0.84 {+-} 0.71(stat) {+-} 0.08(syst) and the direct CP-violation parameter C{sub K{sub S}{sup 0}}{pi}{sup 0}{pi}{sup 0} = 0.27 {+-} 0.52(stat) {+-} 0.13(syst), where the first uncertainty is statistical and the second systematic.
Issues in General Physics Research: 2011 Edition
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Measurement of CP Asymmetry in B0 to Ks Pi0 Pi0 Decays
We present a measurement of the time-dependent CP asymmetry for the neutral B-meson decay into the CP = +1 final state K{sub S}°?°?°, with K{sub S}° →??−. We use a sample of approximately 227 million B-meson pairs recorded at the?(4S) resonance with the BABAR detector at the PEP-II B-Factory at SLAC. From an unbinned maximum likelihood fit we extract the mixing-induced CP-violation parameter S = 0.72 ± 0.71 ± 0.08 and the direct CP-violation parameter C = 0.23 ± 0.52 ± 0.13, where the first uncertainty is statistical and the second systematic.