Phys. Rev. D
70,
032003
(2004)
[16 pages]
Measurement of the B-meson inclusive semileptonic branching fraction and electron-energy moments
A. H. Mahmood et al. (CLEO Collaboration)
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A. H. Mahmood1, S. E. Csorna2, G. Bonvicini3, D. Cinabro3, M. Dubrovin3, A. Bornheim4, E. Lipeles4, S. P. Pappas4, A. Shapiro4, A. J. Weinstein4, R. A. Briere5, G. P. Chen5, T. Ferguson5, G. Tatishvili5, H. Vogel5, M. E. Watkins5, N. E. Adam6, J. P. Alexander6, K. Berkelman6, V. Boisvert6, D. G. Cassel6, J. E. Duboscq6, K. M. Ecklund6, R. Ehrlich6, R. S. Galik6, L. Gibbons6, B. Gittelman6, S. W. Gray6, D. L. Hartill6, B. K. Heltsley6, L. Hsu6, C. D. Jones6, J. Kandaswamy6, D. L. Kreinick6, V. E. Kuznetsov6, A. Magerkurth6, H. Mahlke-Krüger6, T. O. Meyer6, J. R. Patterson6, T. K. Pedlar6, D. Peterson6, J. Pivarski6, D. Riley6, A. J. Sadoff6, H. Schwarthoff6, M. R. Shepherd6, W. M. Sun6, J. G. Thayer6, D. Urner6, T. Wilksen6, M. Weinberger6, S. B. Athar7, P. Avery7, L. Breva-Newell7, V. Potlia7, H. Stoeck7, J. Yelton7, B. I. Eisenstein8, G. D. Gollin8, I. Karliner8, N. Lowrey8, P. Naik8, C. Sedlack8, M. Selen8, J. J. Thaler8, J. Williams8, K. W. Edwards9, D. Besson10, K. Y. Gao11, D. T. Gong11, Y. Kubota11, S. Z. Li11, R. Poling11, A. W. Scott11, A. Smith11, C. J. Stepaniak11, J. Urheim11, Z. Metreveli12, K. K. Seth12, A. Tomaradze12, P. Zweber12, J. Ernst13, K. Arms14, E. Eckhart14, K. K. Gan14, C. Gwon14, H. Severini15, P. Skubic15, D. M. Asner16, S. A. Dytman16, S. Mehrabyan16, J. A. Mueller16, S. Nam16, V. Savinov16, G. S. Huang17, D. H. Miller17, V. Pavlunin17, B. Sanghi17, E. I. Shibata17, I. P. J. Shipsey17, G. S. Adams18, M. Chasse18, J. P. Cummings18, I. Danko18, J. Napolitano18, D. Cronin-Hennessy19, C. S. Park19, W. Park19, J. B. Thayer19, E. H. Thorndike19, T. E. Coan20, Y. S. Gao20, F. Liu20, R. Stroynowski20, M. Artuso21, C. Boulahouache21, S. Blusk21, J. Butt21, E. Dambasuren21, O. Dorjkhaidav21, J. Haynes21, N. Menaa21, R. Mountain21, H. Muramatsu21, R. Nandakumar21, R. Redjimi21, R. Sia21, T. Skwarnicki21, S. Stone21, J. C. Wang21, and Kevin Zhang21
1University of Texas - Pan American, Edinburg, Texas 78539, USA
2Vanderbilt University, Nashville, Tennessee 37235, USA
3Wayne State University, Detroit, Michigan 48202, USA
4California Institute of Technology, Pasadena, California 91125, USA
5Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
6Cornell University, Ithaca, New York 14853, USA
7University of Florida, Gainesville, Florida 32611, USA
8University of Illinois, Urbana-Champaign, Illinois 61801, USA
9Carleton University, Ottawa, Ontario, Canada K1S 5B6the Institute of Particle Physics, Canada
10University of Kansas, Lawrence, Kansas 66045, USA
11University of Minnesota, Minneapolis, Minnesota 55455, USA
12Northwestern University, Evanston, Illinois 60208, USA
13State University of New York at Albany, Albany, New York 12222, USA
14Ohio State University, Columbus, Ohio 43210, USA
15University of Oklahoma, Norman, Oklahoma 73019, USA
16University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
17Purdue University, West Lafayette, Indiana 47907, USA
18Rensselaer Polytechnic Institute, Troy, New York 12180, USA
19University of Rochester, Rochester, New York 14627, USA
20Southern Methodist University, Dallas, Texas 75275, USA
21Syracuse University, Syracuse, New York 13244, USA
(CLEO Collaboration)
Received 8 April 2004; published 17 August 2004
We report a new measurement of the B-meson semileptonic decay momentum spectrum that has been made with a sample of 9.4 fb-1 of e+e- data collected with the CLEO II detector at the Υ(4S) resonance. Electrons from primary semileptonic decays and secondary charm decays were separated by using charge and angular correlations in Υ(4S) events with a high-momentum lepton and an additional electron. We determined the semileptonic branching fraction to be B(B⃗Xe+νe)=(10.91±0.09±0.24)% from the normalization of the electron-energy spectrum. We also measured the moments of the electron-energy spectrum with minimum energies from 0.6 to 1.5 GeV.
© 2004 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.70.032003
DOI:
10.1103/PhysRevD.70.032003
PACS:
13.20.He, 12.15.Ff, 14.40.Nd
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