Phys. Rev. Lett.
82,
3746–3750
(1999)
Measurement of the B→Dℓν Branching Fractions and Form Factor
J. Bartelt et al. (CLEO Collaboration)
Show All Authors/Affiliations
Hide All Authors/Affiliations
J. Bartelt1, S. E. Csorna1, K. W. McLean1, S. Marka1, Z. Xu1, R. Godang2, K. Kinoshita2,*, I. C. Lai2, P. Pomianowski2, S. Schrenk2, G. Bonvicini3, D. Cinabro3, R. Greene3, L. P. Perera3, G. J. Zhou3, S. Chan4, G. Eigen4, E. Lipeles4, J. S. Miller4, M. Schmidtler4, A. Shapiro4, W. M. Sun4, J. Urheim4, A. J. Weinstein4, F. Würthwein4, D. E. Jaffe5, G. Masek5, H. P. Paar5, E. M. Potter5, S. Prell5, V. Sharma5, D. M. Asner6, J. Gronberg6, T. S. Hill6, D. J. Lange6, R. J. Morrison6, H. N. Nelson6, T. K. Nelson6, D. Roberts6, B. H. Behrens7, W. T. Ford7, A. Gritsan7, H. Krieg7, J. Roy7, J. G. Smith7, J. P. Alexander8, R. Baker8, C. Bebek8, B. E. Berger8, K. Berkelman8, V. Boisvert8, D. G. Cassel8, D. S. Crowcroft8, M. Dickson8, S. von Dombrowski8, P. S. Drell8, K. M. Ecklund8, R. Ehrlich8, A. D. Foland8, P. Gaidarev8, L. Gibbons8, B. Gittelman8, S. W. Gray8, D. L. Hartill8, B. K. Heltsley8, P. I. Hopman8, J. Kandaswamy8, D. L. Kreinick8, T. Lee8, Y. Liu8, N. B. Mistry8, C. R. Ng8, E. Nordberg8, M. Ogg8,†, J. R. Patterson8, D. Peterson8, D. Riley8, A. Soffer8, B. Valant-Spaight8, A. Warburton8, C. Ward8, M. Athanas9, P. Avery9, C. D. Jones9, M. Lohner9, C. Prescott9, A. I. Rubiera9, J. Yelton9, J. Zheng9, G. Brandenburg10, R. A. Briere10, A. Ershov10, Y. S. Gao10, D. Y.-J. Kim10, R. Wilson10, H. Yamamoto10, T. E. Browder11, Y. Li11, J. L. Rodriguez11, S. K. Sahu11, T. Bergfeld12, B. I. Eisenstein12, J. Ernst12, G. E. Gladding12, G. D. Gollin12, R. M. Hans12, E. Johnson12, I. Karliner12, M. A. Marsh12, M. Palmer12, M. Selen12, J. J. Thaler12, K. W. Edwards13, A. Bellerive14, R. Janicek14, P. M. Patel14, A. J. Sadoff15, R. Ammar16, P. Baringer16, A. Bean16, D. Besson16, D. Coppage16, C. Darling16, R. Davis16, S. Kotov16, I. Kravchenko16, N. Kwak16, L. Zhou16, S. Anderson17, Y. Kubota17, S. J. Lee17, R. Mahapatra17, J. J. O'Neill17, R. Poling17, T. Riehle17, A. Smith17, M. S. Alam18, S. B. Athar18, Z. Ling18, A. H. Mahmood18, S. Timm18, F. Wappler18, A. Anastassov19, J. E. Duboscq19, K. K. Gan19, T. Hart19, K. Honscheid19, H. Kagan19, R. Kass19, J. Lee19, H. Schwarthoff19, A. Wolf19, M. M. Zoeller19, S. J. Richichi20, H. Severini20, P. Skubic20, A. Undrus20, M. Bishai21, S. Chen21, J. Fast21, J. W. Hinson21, N. Menon21, D. H. Miller21, E. I. Shibata21, I. P. J. Shipsey21, S. Glenn22, Y. Kwon22,‡, A. L. Lyon22, S. Roberts22, E. H. Thorndike22, C. P. Jessop23, K. Lingel23, H. Marsiske23, M. L. Perl23, V. Savinov23, D. Ugolini23, X. Zhou23, T. E. Coan24, V. Fadeyev24, I. Korolkov24, Y. Maravin24, I. Narsky24, R. Stroynowski24, J. Ye24, T. Wlodek24, M. Artuso25, E. Dambasuren25, S. Kopp25, G. C. Moneti25, R. Mountain25, S. Schuh25, T. Skwarnicki25, S. Stone25, A. Titov25, G. Viehhauser25, and J. C. Wang25 (CLEO Collaboration)
1Vanderbilt University, Nashville, Tennessee 37235
2Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
3Wayne State University, Detroit, Michigan 48202
4California Institute of Technology, Pasadena, California 91125
5University of California, San Diego, La Jolla, California 92093
6University of California, Santa Barbara, California 93106
7University of Colorado, Boulder, Colorado 80309-0390
8Cornell University, Ithaca, New York 14853
9University of Florida, Gainesville, Florida 32611
10Harvard University, Cambridge, Massachusetts 02138
11University of Hawaii at Manoa, Honolulu, Hawaii 96822
12University of Illinois, Urbana-Champaign, Illinois 61801
13Carleton University, Ottawa, Ontario, Canada K1S 5B6 and the Institute of Particle Physics, Canada
14McGill University, Montréal, Québec, Canada H3A 2T8 and the Institute of Particle Physics, Canada
15Ithaca College, Ithaca, New York 14850
16University of Kansas, Lawrence, Kansas 66045
17University of Minnesota, Minneapolis, Minnesota 55455
18State University of New York at Albany, Albany, New York 12222
19Ohio State University, Columbus, Ohio 43210
20University of Oklahoma, Norman, Oklahoma 73019
21Purdue University, West Lafayette, Indiana 47907
22University of Rochester, Rochester, New York 14627
23Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
24Southern Methodist University, Dallas, Texas 75275
25Syracuse University, Syracuse, New York 13244
Received 25 November 1998; published in the issue dated 10 May 1999
Using a sample of 3.3×106 B-meson decays collected with the CLEO detector at the Cornell Electron Storage Ring, we have studied B-→D0ℓ-ν̅ and B̅ 0→D+ℓ-ν̅ decays, where ℓ- can be either e- or μ-. We distinguish B→Dℓν from other B semileptonic decays by examining the net momentum and energy of the particles recoiling against D-ℓ pairs. We find Γ(B→Dℓν) = (14.1±1.0±1.2)ns-1 and derive branching fractions for B-→D0ℓ-ν̅ and B̅ 0→D+ℓ-ν̅ of (2.32±0.17±0.20)% and (2.20±0.16±0.19)%, respectively, where the uncertainties are statistical and systematic. We also investigate the B→Dℓν form factor and the implication of the result for |Vcb|.
© 1999 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.3746
DOI:
10.1103/PhysRevLett.82.3746
PACS:
13.20.He, 12.15.Hh, 12.39.Hg, 14.40.Nd
*Permanent address: University of Cincinnati, Cincinnati, OH 45221. †Permanent address: University of Texas, Austin, TX 78712. ‡Permanent address: Yonsie University, Seoul 120-749, Korea.
|
|
