Journal article

Measurement of the time-dependent CP asymmetries in B0→KS0ρ 0γ decays

Li, J.; Adachi, I.; Arinstein, K.; Aushev, T.; Bakich, A.M.; Balagura, V.; Bedny, I.; Bhardwaj, V.; Bitenc, U.; Bozek, A.

We report the first measurement of time-dependent CP asymmetry in B0→KS0ρ0γ decays based on 657×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy collider. We measure the CP-violating parameter SKS0ρ0γ=0.11±0.33(stat)-0.09+0.05(syst) from a signal of 212±17 events. We also obtain the effective direct CP-violating parameter Aeff=0.05±0.18(stat)±0.06(syst) for mKS0π+π-<1.8GeV/c2 and 0.6GeV/c2<mπ+π-<0.9GeV/c2. © 2008 The American Physical Society.


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