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Time-dependent analysis of B0 → KS0π-π+γ decays and studies of the K+π-π+ system in B+ → K+π-π+γ decays

We measure the time-dependent CP asymmetry in the radiative-penguin decay B0 → KS0π-π+γ , using a sample of 471×106 Υ(4S)→BB-events recorded with the BABAR detector at the PEP-II e+e- storage ring at SLAC. Using events with mKππ < 1.8 GeV/c2, we measure the branching fractions of B+→K+π-π+γ and B...

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Bibliographic Details
Published in:Physical review. D 2016-03, Vol.93 (5)
Main Authors: Lees, J. P., Palano, A., Eigen, G., Kolomensky, Yu. G., Lee, M. J., Lynch, G., Buzykaev, A. R., Druzhinin, V. P., Golubev, V. B., Kravchenko, E. A., Todyshev, K. Yu, Long, O., West, C. A., Chao, D. S., Cheng, C. H., Echenard, B., Hitlin, D. G., Porter, F. C., Huard, Z., Sun, L., Wagner, S. R., Spaan, B., Bernard, D., Verderi, M., Cibinetto, G., Santoro, V., Patteri, P., Zallo, A., Monge, M. R., Prasad, V., Lacker, H. M., Mallik, U., Chen, C., Ahmed, H., Arnaud, N., Davier, M., Stocchi, A., Wright, D. M., Coleman, J. P., Touramanis, C., Bevan, A. J., Di Lodovico, F., Sacco, R., Fritsch, M., Gradl, W., Hafner, A., Barlow, R. J., Lafferty, G. D., Cheaib, R., Dey, B., Cremaldi, L., Taras, P., De Nardo, G., Jessop, C. P., LoSecco, J. M., Kass, R., Margoni, M., Posocco, M., Rotondo, M., Akar, S., Ben-Haim, E., Bonneaud, G. R., Briand, H., Chauveau, J., Ocariz, J., Angelini, C., Casarosa, G., Forti, F., Oberhof, B., Paoloni, E., Rama, M., Ferrarotto, F., Ferroni, F., Piredda, G., Leddig, T., Waldi, R., Dubois-Felsmann, G. P., Graham, M. T., Hast, C., Innes, W. R., Kim, P., Luth, V., Pulliam, T., Schindler, R. H., Su, D., Guttman, N., Soffer, A., Schwitters, R. F., Izen, J. M., Lou, X. C., Filippi, A., Gamba, D., Lanceri, L., Oyanguren, A., Bernlochner, F. U., Lewczuk, M. J., Sobie, R. J., Gershon, T. J., Latham, T. E., Pan, Y.
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Language:English
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Summary:We measure the time-dependent CP asymmetry in the radiative-penguin decay B0 → KS0π-π+γ , using a sample of 471×106 Υ(4S)→BB-events recorded with the BABAR detector at the PEP-II e+e- storage ring at SLAC. Using events with mKππ < 1.8 GeV/c2, we measure the branching fractions of B+→K+π-π+γ and B0→K0π-π+γ, the branching fractions of the kaonic resonances decaying to K+π-π+, as well as the overall branching fractions of the B+→ρ0K+γ, B+→K*0π+γ and S-wave B+→(Kπ)0*0π+γ components. For events from the ρ mass band, we measure the CP-violating parameters SKS0π+π-γ=0.14±0.25±0.03 and CKS0π+π-γ=-0.39±0.20-0.02+0.03, where the first uncertainties are statistical and the second are systematic. We extract from this measurement the time-dependent CP asymmetry related to the CP eigenstate ρ0KS0 and obtain SKS0ργ=-0.18±0.32-0.05+0.06, which provides information on the photon polarization in the underlying b→sγ transition.
ISSN:2470-0010
2470-0029