Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, vol. 76, p. -

Branching fraction and charge asymmetry measurements in B→J/ψππ decays

Aubert B., Bona M., Boutigny D., Karyotakis Y., Lees J. P., Poireau V., Prudent X., Tisserand V., Zghiche A., Garra Tico J., Grauges E., Lopez L., Palano A., Eigen G., Ofte I., Stugu B., Sun L., Abrams G. S., Battaglia M., Brown D. N., Button-Shafer J., Cahn R. N., Groysman Y., Jacobsen R. G., Kadyk J. A., Kerth L. T., Kolomensky Yu G., Kukartsev G., Lopes Pegna D., Lynch G., Mir L. M., Orimoto T. J., Pripstein M., Roe N. A., Ronan M. T., Tackmann K., Wenzel W. A., Del Amo Sanchez P., Hawkes C. M., Watson A. T., Held T., Koch H., Lewandowski B., Pelizaeus M., Schroeder T., Steinke M., Cottingham W. N., Walker D., Asgeirsson D. J., Cuhadar-Donszelmann T., Fulsom B. G., Hearty C., Knecht N. S., Mattison T. S., McKenna J. A., Khan A., Saleem M., Teodorescu L., Blinov V. E., Bukin A. D., Druzhinin V. P., Golubev V. B., Onuchin A. P., Serednyakov S. I., Skovpen Yu I., Solodov E. P., Todyshev K. Yu, Bondioli M., Curry S., Eschrich I., Kirkby D., Lankford A. J., Lund P., Mandelkern M., Martin E. C., Stoker D. P., Abachi S., Buchanan C., Foulkes S. D., Gary J. W., Liu F., Long O., Shen B. C., Zhang L., Paar H. P., Rahatlou S., Sharma V., Berryhill J. W., Campagnari C., Cunha A., Dahmes B., Hong T. M., Kovalskyi D., Richman J. D., Beck T. W., Eisner A. M., Flacco C. J., Heusch C. A., Kroseberg J., Lockman W. S.

We study the decays B0→J/ψπ+π- and B+→J/ ψπ+π0, including intermediate resonances, using a sample of 382×106 BB̄ pairs recorded by the BABAR detector at the PEP-II e+e- B factory. We measure the branching fractions B(B0→J/ψρ0)=(2. 7±0.3±0.2)×10-5 and B(B+→J/ψρ+)=(5.0±0. 7±0.3)×10-5. We also set the following upper limits at the 90% confidence level: B(B0→J/ψπ+π-nonresonant)<1.2×10-5, B(B0→J/ψf2)<4.6×10-6, and B(B+→J/ ψπ+π0nonresonant)<7.3×10-6. We measure the charge asymmetry in charged B decays to J/ψρ to be -0.11±0.12±0.08. © 2007 The American Physical Society.