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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2002, vol. 65, p. -

Study of CP-violating asymmetries in B0→ π+π-K+π- decays

Aubert B., Boutigny D., Gaillard J. M., Hicheur A., Karyotakis Y., Lees J. P., Robbe P., Tisserand V., Palano A., Pompili A., Chen G. P., Chen J. C., Qi N. D., Kong G., Wang P., Zhu Y. S., Eigen G., Stugu B., Abrams G. S., Borgland A. W., Breon A. B., Brown D. N., Button-Shafer J., Cahn R. N., Clark A. R., Gill M. S., Gritsan A. V., Groysman Y., Jacobsen R. G., Kadel R. W., Kadyk J., Kerth L. T., Kolomensky Yu G., Kral J. F., LeClerc C., Levi M. E., Lynch G., Oddone P. J., Perazzo A., Pripstein M., Roe N. A., Romosan A., Ronan M. T., Shelkov V. G., Telnov A. V., Wenzel W. A., Bright-Thomas P. G., Harrison T. J., Hawkes C. M., Knowles D. J., O'Neale S. W., Penny R. C., Watson A. T., Watson N. K., Deppermann T., Goetzen K., Koch H., Kunze M., Lewandowski B., Peters K., Schmuecker H., Steinke M., Andress J. C., Barlow N. R., Bhimji W., Chevalier N., Clark P. J., Cottingham W. N., Dyce N., Foster B., Mackay C., Wilson F. F., Abe K., Hearty C., Mattison T. S., McKenna J. A., Thiessen D., Jolly S., McKemey A. K., Blinov V. E., Bukin A. D., Bukin D. A., Buzykaev A. R., Golubev V. B., Ivanchenko V. N., Korol A. A., Kravchenko E. A., Onuchin A. P., Serednyakov S. I., Skovpen Yu I., Telnov V. I., Yushkov A. N., Best D., Chao M., Kirkby D., Lankford A. J., Mandelkern M., McMahon S., Stoker D. P.

We present a measurement of the time-dependent CP-violating asymmetries in neutral B decays to the eigenstate, and an updated measurement of the charge asymmetry in B0→K+π-~ decays. In a sample of 33 million Y(4S)→BB̄ decays collected with the BABAR detector at the SLAC PEP-II asymmetric B factory, we find 65-11 +12 and 217±18 K+π- candidates and measure the asymmetry parameters Sππ=0.03-0.56 +0.53±0.111, Cππ=-0.25-0.17 +0.45±0.14, and AKπ = -0.07±0. 08±0.02, where the first error is statistical and the second is systematic. © 2002 The American Physical Society.