Phys. Rev. Lett.
88,
231803
(2002)
[5 pages]
Improved Measurement of |Vub| with Inclusive Semileptonic B Decays
A. Bornheim et al. (CLEO Collaboration)
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A. Bornheim1, E. Lipeles1, S. P. Pappas1, A. Shapiro1, W. M. Sun1, A. J. Weinstein1, G. Masek2, H. P. Paar2, R. Mahapatra3, R. J. Morrison3, R. A. Briere4, G. P. Chen4, T. Ferguson4, G. Tatishvili4, H. Vogel4, N. E. Adam5, J. P. Alexander5, C. Bebek5, K. Berkelman5, F. Blanc5, V. Boisvert5, D. G. Cassel5, P. S. Drell5, J. E. Duboscq5, K. M. Ecklund5, R. Ehrlich5, L. Gibbons5, B. Gittelman5, S. W. Gray5, D. L. Hartill5, B. K. Heltsley5, L. Hsu5, C. D. Jones5, J. Kandaswamy5, D. L. Kreinick5, A. Magerkurth5, H. Mahlke-Krüger5, T. O. Meyer5, N. B. Mistry5, E. Nordberg5, M. Palmer5, J. R. Patterson5, D. Peterson5, J. Pivarski5, D. Riley5, A. J. Sadoff5, H. Schwarthoff5, M. R. Shepherd5, J. G. Thayer5, D. Urner5, B. Valant-Spaight5, G. Viehhauser5, A. Warburton5, M. Weinberger5, S. B. Athar6, P. Avery6, C. Prescott6, H. Stoeck6, J. Yelton6, G. Brandenburg7, A. Ershov7, D. Y.-J. Kim7, R. Wilson7, K. Benslama8, B. I. Eisenstein8, J. Ernst8, G. D. Gollin8, R. M. Hans8, I. Karliner8, N. Lowrey8, M. A. Marsh8, C. Plager8, C. Sedlack8, M. Selen8, J. J. Thaler8, J. Williams8, K. W. Edwards9, R. Ammar10, D. Besson10, X. Zhao10, S. Anderson11, V. V. Frolov11, Y. Kubota11, S. J. Lee11, S. Z. Li11, R. Poling11, A. Smith11, C. J. Stepaniak11, J. Urheim11, S. Ahmed12, M. S. Alam12, L. Jian12, M. Saleem12, F. Wappler12, E. Eckhart13, K. K. Gan13, C. Gwon13, T. Hart13, K. Honscheid13, D. Hufnagel13, H. Kagan13, R. Kass13, T. K. Pedlar13, J. B. Thayer13, E. von Toerne13, T. Wilksen13, M. M. Zoeller13, S. J. Richichi14, H. Severini14, P. Skubic14, S. A. Dytman15, S. Nam15, V. Savinov15, S. Chen16, J. W. Hinson16, J. Lee16, D. H. Miller16, V. Pavlunin16, E. I. Shibata16, I. P. J. Shipsey16, D. Cronin-Hennessy17, A. L. Lyon17, C. S. Park17, W. Park17, E. H. Thorndike17, T. E. Coan18, Y. S. Gao18, F. Liu18, Y. Maravin18, I. Narsky18, R. Stroynowski18, J. Ye18, M. Artuso19, C. Boulahouache19, K. Bukin19, E. Dambasuren19, R. Mountain19, T. Skwarnicki19, S. Stone19, J. C. Wang19, A. H. Mahmood20, S. E. Csorna21, I. Danko21, Z. Xu21, G. Bonvicini22, D. Cinabro22, M. Dubrovin22, and S. McGee22 (CLEO Collaboration)
1California Institute of Technology, Pasadena, California 91125
2University of California–San Diego, La Jolla, California 92093
3University of California, Santa Barbara, California 93106
4Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
5Cornell University, Ithaca, New York 14853
6University of Florida, Gainesville, Florida 32611
7Harvard University, Cambridge, Massachusetts 02138
8University of Illinois, Urbana-Champaign, Illinois 61801
9Carleton University, Ottawa, Ontario, Canada K1S 5B6
9band Institute of Particle Physics, Canada M5S 1A7
10University of Kansas, Lawrence, Kansas 66045
11University of Minnesota, Minneapolis, Minnesota 55455
12State University of New York at Albany, Albany, New York 12222
13Ohio State University, Columbus, Ohio 43210
14University of Oklahoma, Norman, Oklahoma 73019
15University of Pittsburgh, Pittsburgh, Pennsylvania 15260
16Purdue University, West Lafayette, Indiana 47907
17University of Rochester, Rochester, New York 14627
18Southern Methodist University, Dallas, Texas 75275
19Syracuse University, Syracuse, New York 13244
20University of Texas–Pan American, Edinburg, Texas 78539
21Vanderbilt University, Nashville, Tennessee 37235
22Wayne State University, Detroit, Michigan 48202
Received 8 February 2002; published 28 May 2002
We report a new measurement of the Cabibbo-Kobayashi-Maskawa parameter |Vub| made with a sample of 9.7×106 BB̅ events collected with the CLEO II detector. Using heavy quark theory, we combine the observed yield of leptons from semileptonic B decay in the end-point momentum interval 2.2–2.6GeV/c with recent CLEO II data on B→Xsγ to find |Vub| = (4.08±0.34±0.44±0.16±0.24)×10-3, where the first two uncertainties are experimental and the last two are from theory.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.231803
DOI:
10.1103/PhysRevLett.88.231803
PACS:
13.20.He, 12.15.Ff, 14.40.Nd
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