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ISSN - 03702693, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2002, vol. 542, p. 183-192

Study of B → ρπ decays at Belle

Gordon A., Chao Y., Abe K., Abe K., Abe N., Abe R., Abe T., Ahn Byoung Sup, Aihara H., Akatsu M., Asano Y., Aso T., Aulchenko V., Aushev T., Bakich A. M., Ban Y., Bay A., Bedny I., Behera P. K., Bizjak I., Bondar A., Bozek A., Bračko M., Browder T. E., Casey B. C K, Chang M. C., Chang P., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Danilov M., Dong L. Y., Dragic J., Drutskoy A., Eidelman S., Eiges V., Enari Y., Everton C. W., Fang F., Fujii H.

This Letter describes a study of B meson decays to the pseudoscalar-vector final state ρπ using 31.9 × 106 BB̌ events collected with the Belle detector at KEKB. The branching fractions B(B+ → ρ0π+) = (8.0-2.0-.07 +2.3+0.7) × 10-6 and B(B0 → ρ0π0) = (20.8-6.3-3.1 +6.0+2.8) × 10-6 are obtained. In addition, a 90% confidence level upper limit of B(B0 → ρ0π0) < 5.3 × 10-6 is reported. © 2002 Elsevier Science B.V. All rights reserved.