Phys. Rev. Lett.
87,
251808
(2001)
[5 pages]
Hadronic Mass Moments in Inclusive Semileptonic B Meson Decays
D. Cronin-Hennessy et al. (CLEO Collaboration)
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D. Cronin-Hennessy1, A. L. Lyon1, S. Roberts1, E. H. Thorndike1, T. E. Coan2, V. Fadeyev2, Y. S. Gao2, Y. Maravin2, I. Narsky2, R. Stroynowski2, J. Ye2, T. Wlodek2, M. Artuso3, K. Benslama3, C. Boulahouache3, K. Bukin3, E. Dambasuren3, G. Majumder3, R. Mountain3, T. Skwarnicki3, S. Stone3, J. C. Wang3, A. Wolf3, S. Kopp4, M. Kostin4, A. H. Mahmood5, S. E. Csorna6, I. Danko6, K. W. McLean6, Z. Xu6, R. Godang7, G. Bonvicini8, D. Cinabro8, M. Dubrovin8, S. McGee8, G. J. Zhou8, A. Bornheim9, E. Lipeles9, S. P. Pappas9, A. Shapiro9, W. M. Sun9, A. J. Weinstein9, D. E. Jaffe10, R. Mahapatra10, G. Masek10, H. P. Paar10, D. M. Asner11, A. Eppich11, T. S. Hill11, R. J. Morrison11, R. A. Briere12, G. P. Chen12, T. Ferguson12, H. Vogel12, J. P. Alexander13, C. Bebek13, B. E. Berger13, K. Berkelman13, F. Blanc13, V. Boisvert13, D. G. Cassel13, P. S. Drell13, J. E. Duboscq13, K. M. Ecklund13, R. Ehrlich13, P. Gaidarev13, L. Gibbons13, B. Gittelman13, S. W. Gray13, D. L. Hartill13, B. K. Heltsley13, L. Hsu13, C. D. Jones13, J. Kandaswamy13, D. L. Kreinick13, M. Lohner13, A. Magerkurth13, T. O. Meyer13, N. B. Mistry13, E. Nordberg13, M. Palmer13, J. R. Patterson13, D. Peterson13, D. Riley13, A. Romano13, H. Schwarthoff13, J. G. Thayer13, D. Urner13, B. Valant-Spaight13, G. Viehhauser13, A. Warburton13, P. Avery14, C. Prescott14, A. I. Rubiera14, H. Stoeck14, J. Yelton14, G. Brandenburg15, A. Ershov15, D. Y.-J. Kim15, R. Wilson15, T. Bergfeld16, B. I. Eisenstein16, J. Ernst16, G. E. Gladding16, G. D. Gollin16, R. M. Hans16, E. Johnson16, I. Karliner16, M. A. Marsh16, C. Plager16, C. Sedlack16, M. Selen16, J. J. Thaler16, J. Williams16, K. W. Edwards17a,17b, A. J. Sadoff18, R. Ammar19, A. Bean19, D. Besson19, X. Zhao19, S. Anderson20, V. V. Frolov20, Y. Kubota20, S. J. Lee20, R. Poling20, A. Smith20, C. J. Stepaniak20, J. Urheim20, S. Ahmed21, M. S. Alam21, S. B. Athar21, L. Jian21, L. Ling21, M. Saleem21, S. Timm21, F. Wappler21, A. Anastassov22, E. Eckhart22, K. K. Gan22, C. Gwon22, T. Hart22, K. Honscheid22, D. Hufnagel22, H. Kagan22, R. Kass22, T. K. Pedlar22, J. B. Thayer22, E. von Toerne22, M. M. Zoeller22, S. J. Richichi23, H. Severini23, P. Skubic23, A. Undrus23, V. Savinov24, S. Chen25, J. W. Hinson25, J. Lee25, D. H. Miller25, V. Pavlunin25, E. I. Shibata25, and I. P. J. Shipsey25 (CLEO Collaboration)
1University of Rochester, Rochester, New York 14627
2Southern Methodist University, Dallas, Texas 75275
3Syracuse University, Syracuse, New York 13244
4University of Texas, Austin, Texas 78712
5University of Texas-Pan American, Edinburg, Texas 78539
6Vanderbilt University, Nashville, Tennessee 37235
7Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
8Wayne State University, Detroit, Michigan 48202
9California Institute of Technology, Pasadena, California 91125
10University of California, San Diego, La Jolla, California 92093
11University of California, Santa Barbara, California 93106
12Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
13Cornell University, Ithaca, New York 14853
14University of Florida, Gainesville, Florida 32611
15Harvard University, Cambridge, Massachusetts 02138
16University of Illinois, Urbana-Champaign, Illinois 61801
17aCarleton University, Ottawa, Ontario, Canada K1S 5B6
17band the Institute of Particle Physics, Canada
18Ithaca College, Ithaca, New York 14850
19University of Kansas, Lawrence, Kansas 66045
20University of Minnesota, Minneapolis, Minnesota 55455
21State University of New York at Albany, Albany, New York 12222
22Ohio State University, Columbus, Ohio 43210
23University of Oklahoma, Norman, Oklahoma 73019
24University of Pittsburgh, Pittsburgh, Pennsylvania 15260
25Purdue University, West Lafayette, Indiana 47907
Received 16 August 2001; published 3 December 2001
We have measured the first and second moments of the hadronic mass-squared distribution in B→Xcℓν, for Plepton>1.5GeV/c. We find 〈MX2-M̅ D2〉 = 0.251±0.066GeV2, 〈(MX2-〈MX2〉)2〉 = 0.576±0.170GeV4, where M̅ D is the spin-averaged D meson mass. From that first moment and the first moment of the photon energy spectrum in b→sγ, we find the heavy quark effective theory parameter λ1 (in the modified minimal subtraction renormalization scheme, to order 1/MB3 and β0αs2) to be -0.24±0.11GeV2. Using these first moments and the B semileptonic width, and assuming parton-hadron duality, we obtain |Vcb| = 0.0404±0.0013.
© 2001 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.251808
DOI:
10.1103/PhysRevLett.87.251808
PACS:
13.20.He, 12.15.Hh, 12.39.Hg
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