Measurement of time-dependentCPasymmetry inB0→KS0π0γdecays

B. Aubert, M. Bona, Y. Karyotakis, J. P. Lees, V. Poireau, E. Prencipe, X. Prudent, V. Tisserand, J. Garra Tico, E. Grauges, L. Lopez, A. Palano (+515 others)
2008 Physical Review D  
We measure the time-dependent CP asymmetry in B0 --> K_S0 pi0 gamma decays for two regions of K_S0-pi0 invariant mass, m(K_S0 pi0), using the final BABAR data set of 467 x 10^6 BBbar pairs collected at the PEP-II e+e- collider at SLAC. We find 339 +/- 24 B0 --> K*0 gamma candidates and measure S_K* gamma = -0.03 +/- 0.29 +/- 0.03 and C_K* gamma = -0.14 +/- 0.16 +/- 0.03. In the range 1.1 < m(K_S0 pi0) < 1.8 GeV/c^2 we find 133 +/- 20 B0 --> K_S0 pi0 gamma candidates and measure S_K_S0 pi0 gamma
more » ... = -0.78 +/- 0.59 +/- 0.09 and C_K_S0 pi0 gamma = -0.36 +/- 0.33 +/- 0.04. The uncertainties are statistical and systematic, respectively.
doi:10.1103/physrevd.78.071102 fatcat:zzgwyg3bwvgize7ug36doq6ahq