Phys. Rev. Lett.
88,
062001
(2002)
[5 pages]
Observation of B̅ 0→D0π0 and B̅ 0→D*0π0
T. E. Coan et al. (CLEO Collaboration)
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T. E. Coan1, Y. S. Gao1, F. Liu1, Y. Maravin1, I. Narsky1, R. Stroynowski1, J. Ye1, M. Artuso2, C. Boulahouache2, K. Bukin2, E. Dambasuren2, R. Mountain2, T. Skwarnicki2, S. Stone2, J. C. Wang2, A. H. Mahmood3, S. E. Csorna4, I. Danko4, Z. Xu4, G. Bonvicini5, D. Cinabro5, M. Dubrovin5, S. McGee5, A. Bornheim6, E. Lipeles6, S. P. Pappas6, A. Shapiro6, W. M. Sun6, A. J. Weinstein6, G. Masek7, H. P. Paar7, R. Mahapatra8, R. J. Morrison8, H. N. Nelson8, R. A. Briere9, G. P. Chen9, T. Ferguson9, G. Tatishvili9, H. Vogel9, N. E. Adam10, J. P. Alexander10, C. Bebek10, K. Berkelman10, F. Blanc10, V. Boisvert10, D. G. Cassel10, P. S. Drell10, J. E. Duboscq10, K. M. Ecklund10, R. Ehrlich10, L. Gibbons10, B. Gittelman10, S. W. Gray10, D. L. Hartill10, B. K. Heltsley10, L. Hsu10, C. D. Jones10, J. Kandaswamy10, D. L. Kreinick10, A. Magerkurth10, H. Mahlke-Krüger10, T. O. Meyer10, N. B. Mistry10, E. Nordberg10, M. Palmer10, J. R. Patterson10, D. Peterson10, J. Pivarski10, D. Riley10, A. J. Sadoff10, H. Schwarthoff10, M. R. Shepherd10, J. G. Thayer10, D. Urner10, B. Valant-Spaight10, G. Viehhauser10, A. Warburton11, M. Weinberger11, S. B. Athar11, P. Avery11, C. Prescott11, H. Stoeck11, J. Yelton11, G. Brandenburg12, A. Ershov12, D. Y.-J. Kim12, R. Wilson12, K. Benslama13, B. I. Eisenstein13, J. Ernst13, G. D. Gollin13, R. M. Hans13, I. Karliner13, N. Lowrey13, M. A. Marsh13, C. Plager13, C. Sedlack13, M. Selen13, J. J. Thaler13, J. Williams13, K. W. Edwards14, R. Ammar15, D. Besson15, X. Zhao15, S. Anderson16, V. V. Frolov16, Y. Kubota16, S. J. Lee16, S. Z. Li16, R. Poling16, A. Smith16, C. J. Stepaniak16, J. Urheim16, S. Ahmed17, M. S. Alam17, L. Jian17, M. Saleem17, F. Wappler17, E. Eckhart18, K. K. Gan18, C. Gwon18, T. Hart18, K. Honscheid18, D. Hufnagel18, H. Kagan18, R. Kass18, T. K. Pedlar18, J. B. Thayer18, E. von Toerne18, M. M. Zoeller18, S. J. Richichi19, H. Severini19, P. Skubic19, S. A. Dytman20, S. Nam20, V. Savinov20, S. Chen21, J. W. Hinson21, J. Lee21, D. H. Miller21, V. Pavlunin21, E. I. Shibata21, I. P. J. Shipsey21, D. Cronin-Hennessy22, A. L. Lyon22, C. S. Park22, W. Park22, and E. H. Thorndike22 (CLEO Collaboration)
1Southern Methodist University, Dallas, Texas 75275 2Syracuse University, Syracuse, New York 13244 3University of Texas–Pan American, Edinburg, Texas 78539 4Vanderbilt University, Nashville, Tennessee 37235 5Wayne State University, Detroit, Michigan 48202 6California Institute of Technology, Pasadena, California 91125 7University of California, San Diego, La Jolla, California 92093 8University of California, Santa Barbara, California 93106 9Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 10Cornell University, Ithaca, New York 14853 11University of Florida, Gainesville, Florida 32611 12Harvard University, Cambridge, Massachusetts 02138 13University of Illinois, Urbana-Champaign, Illinois 61801 14Carleton University, Ottawa, Ontario, Canada K1S 5B6 14band the Institute of Particle Physics, Canada 15University of Kansas, Lawrence, Kansas 66045 16University of Minnesota, Minneapolis, Minnesota 55455 17State University of New York at Albany, Albany, New York 12222 18The Ohio State University, Columbus, Ohio 43210 19University of Oklahoma, Norman, Oklahoma 73019 20University of Pittsburgh, Pittsburgh, Pennsylvania 15260 21Purdue University, West Lafayette, Indiana 47907 22University of Rochester, Rochester, New York 14627
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Publisher's Note
Received 22 October 2001; published 24 January 2002
We have studied the color-suppressed hadronic decays of neutral B mesons into the final states D(*)0π0. Using 9.67×106 BB̅ pairs collected with the CLEO detector, we observe the decays B̅ 0→D0π0 and B̅ 0→D*0π0 with the branching fractions B(B̅ 0→D0π0) = (2.74-0.32+0.36±0.55)×10-4 and B(B̅ 0→D*0π0) = (2.20-0.52+0.59±0.79)×10-4. The first error is statistical and the second systematic. The statistical significance of the D0π0 signal is 12.1σ ( 5.9σ for D*0π0). Utilizing the B̅ 0→D(*)0π0 branching fractions we determine the strong phases δI,D(*) between isospin 1/2 and 3/2 amplitudes in the Dπ and D*π final states to be cosδI,D = 0.89±0.08 and cosδI,D* = 0.89±0.08, respectively.
© 2002 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.062001
DOI:
10.1103/PhysRevLett.88.062001
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