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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2004, vol. 69, p. -

Measurement of the electron energy spectrum and its moments in inclusive B→Xeν decays

Aubert B., Barate R., Boutigny D., Couderc F., Gaillard J. M., Hicheur A., Karyotakis Y., Lees J. 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., Day C. T., Gill M. S., Gritsan A. V., Groysman Y., Jacobsen R. G., Kadel R. W., Kadyk J., Kerth L. T., Kolomensky Yu G., Kukartsev G., LeClerc C., Levi M. E., Lynch G., Mir L. M., Oddone P. J., Orimoto T. J., Pripstein M., Roe N. A., Ronan M. T., Shelkov V. G., Telnov A. V., Wenzel W. A., Ford K., Harrison T. J., Hawkes C. M., Morgan S. E., Watsoh A. T., Watson N. K., Fritsch M., Goetzen K., Held T., Koch H., Lewandowski B., Pelizaeus M., Steinke M., Boyd J. T., Chevalier N., Cottingham W. N., Kelly M. P., Latham T. E., Wilson F. F., Abe K., Cuhadar-Donszelmann T., Hearty C., Mattison T. S., McKenna J. A., Thiessen D., Kyberd P., Teodorescu L., Blinov V. E., Bukin A. D., Druzhinin V. P., Golubev V. B., Ivanchenko V. N., Kravchenko E. A., Onuchin A. P., Serednyakov S. I., Skovpen Yu I., Solodov E. P., Yushkov A. N., Best D., Bruinsma M., Chao M., Eschrich I., Kirkby D., Lankford A. J., Mandelkern M., Mommsen R. K., Roethel W., Stoker D. P., Buchanan C., Hartfiel B. L.

We report a measurement of the inclusive electron energy spectrum for semileptonic decays of B mesons in a data sample of 52 million γ(45)→BB̄ decays collected with the BABAR detector at the PEP-II asymmetric-energy B-meson factory at SLAC. We determine the branching fraction, first, second, and third moments of the spectrum for lower cutoffs on the electron energy between 0.6 and 1.5 GeV. We measure the partial branching fraction to be B(B→Xeν,Ee>0.6 GeV)= [10.36±0. 06(stat.)±0.23(sys.)]%. © 2004 The American Physical Society.