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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2003, vol. 67, p. 911011-911018

Measurement of the B0 meson lifetime with partial reconstruction of B0→D*-π+ and B0→D*p+ decays

Aubert B., Barate R., Boutigny D., Gaillard J. M., Hicheur A., Karyotakis Y., Lees J. P., Robbe P., Tisserand V., Zghiche A., Palano A., Pompili A., Chen J. C., Qi N. D., Rong G., Wang P., Zhu Y. S., Eigen G., Ofte I., Stugu B., Abrams G. S., Borgland A. W., Breon A. B., Brown D. N., Button-Shafer J., Cahn R. N., Charles E., Gill M. S., Gritsan A. V., Groysman Y., Jacobsen R. G., Kadel R. W., Kadyk J., Kerth L. T., Kolomensky Y. G., Kral J. F., LeClerc C., Levi M. E., Lynch G., Mir L. M., Oddone P. J., Orimoto T. J., Pripstein M., Roe N. A., Romosan A., Ronan M. T., Shelkov V. G., Telnov A. V., Wenzel W. A., 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., Lewandowski B., Pelizaeus M., Peters K., Schmuecker H., Steinke M., Barlow N. R., Bhimji W., Boyd J. T., Chevalier N., Clark P. J., Cottingham W. N., Mackay C., Wilson F. F., Hearty C., Mattison T. S., McKenna J. A., Thiessen D., Jolly S., Kyberd P., McKemey A. K., Blinov V. E., Bukin A. D., Buzykaev A. R., Golubev V. B., Ivanchenko V. N., Korol A. A., Kravchenko E. A., Onuchin A. P., Serednyakov S. I., Skovpen Y. I., Yushkov A. N., Best D., Chao M., Kirkby D., Lankford A. J., Mandelkern M., McMahon S., Mommsen R. K., Stoker D. P., Buchanan C., Hadavand H. K.

The neutral B meson lifetime is measured with the data collected by the BABAR detector at the PEP-II storage ring during the years 1999 and 2000, with a total integrated luminosity of 20.7 fb-1. The decays B0 →D*-π+ and B0→D*-p+ are selected with a partial-reconstruction technique, yielding samples of 6970 ±240 and 5520±250 signal events, respectively. With these events, the B0 lifetime is measured to be 1.533 ±0.034 (stat)±0.038 (syst) ps. This measurement serves as a test and validation of procedures required to measure the CP violation parameter sin(2β+γ) with partial reconstruction of these modes.