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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2006, vol. 74, p. -

Time-dependent CP asymmetries in B0→Ks0π0γ transitions

Ushiroda Y., Sumisawa K., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Bakich A. M., Barberio E., Barbero M., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Blyth S., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang P., Chao Y., Chen A., Chen K. F., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Cole S., Dalseno J., Dash M., Eidelman S., Gabyshev N., Gershon T., Go A., Golob B., Ha H., Haba J., Hara K., Hazumi M., Heffernan D., Higuchi T., Hoshi Y., Hou S., Hou W. S., Iijima T., Ikado K., Inami K., Ishikawa A., Ishino H., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim H. J., Kim Y. J., Kinoshita K., Križan P., Kulasiri R., Kumar R., Kuzmin A., Kwon Y. J., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S. W., Mandl F., Marlow D., Matsumoto T., Matyja A., McOnie S., Miyabayashi K., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Mori T., Nakano E., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ogawa S., Ohshima T.

We report measurements of CP violation parameters in B0→KS0π 0γ transitions based on a data sample of 535×106BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. One neutral B meson is fully reconstructed in the B0→KS0π0γ mode. The flavor of the accompanying B meson is identified from its decay products. We obtain time-dependent and direct CP violation parameters S and A for a KS0π0 invariant mass up to 1.8GeV/c2 as SKS0π0γ=-0.10±0.31±0. 07 and AKS0π0γ=-0.20±0.20±0.06. For a KS0π0 invariant mass near the K*0(892) resonance, we obtain SK*0γ=-0.32-0. 33+0.36±0.05 and AK*0γ=-0.20±0.24±0.05. © 2006 The American Physical Society.