Time-dependent CP Asymmetries in $B^0\to K^0_Sρ^0γ$ Decays

Details Time-dependent CP Asymmetries in $B^0\to K^0_Sρ^0γ$ Decays Time-dependent CP Asymmetries in $B^0\to K^0_Sρ^0γ$ Decays

2008-06-12

arxiv.org/abs/0806.1980v1

Phys.Rev.Lett.101:251601,2008

Physics

High Energy Physics

High Energy Physics - Experiment

6 pages, 3 figures, to be submitted to PRL

Scientific paper

10.1103/PhysRevLett.101.251601

We report the first measurement of CP-violation parameters in B^0 -> K_S^0\rho^0\gamma decays based on 657 million B\bar B pairs collected with the Belle detector at the KEKB asymmetric-energy collider. We measure the time-dependent CP violating parameter S_{K_S^0\rho^0\gamma}= 0.11 +/- 0.33(stat.)^{+0.05}_{-0.09}(syst.). We also obtain the effective direct CP violating parameter A_eff=0.05 +/- 0.18(stat.) +/- 0.06(syst.) for m_{K_S\pi^+\pi^-}<1.8 GeV/c^2 and 0.6 GeV/c^2

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