Phys. Rev. Lett. 75, 3232 - 3236 (1995)
Observation of the Isospin-Violating Decay Ds*+→Ds+π0
J. Gronberg et al. (CLEO Collaboration)
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J. Gronberg1, C. M. Korte1, R. Kutschke1, S. Menary1, R. J. Morrison1, S. Nakanishi1, H. N. Nelson1, T. K. Nelson1, C. Qiao1, J. D. Richman1, D. Roberts1, A. Ryd1, H. Tajima1, M. S. Witherell1, R. Balest2, K. Cho2, W. T. Ford2, M. Lohner2, H. Park2, P. Rankin2, J. G. Smith2, J. P. Alexander3, C. Bebek3, B. E. Berger3, K. Berkelman3, K. Bloom3, T. E. Browder3, D. G. Cassel3, H. A. Cho3, D. M. Coffman3, D. S. Crowcroft3, M. Dickson3, P. S. Drell3, D. J. Dumas3, R. Ehrlich3, R. Elia3, P. Gaidarev3, M. Garcia-Sciveres3, B. Gittelman3, S. W. Gray3, D. L. Hartill3, B. K. Heltsley3, S. Henderson3, C. D. Jones3, S. L. Jones3, J. Kandaswamy3, N. Katayama3, P. C. Kim3, D. L. Kreinick3, T. Lee3, Y. Liu3, G. S. Ludwig3, J. Masui3, J. Mevissen3, N. B. Mistry3, C. R. Ng3, E. Nordberg3, J. R. Patterson3, D. Peterson3, D. Riley3, A. Soffer3, P. Avery4, A. Freyberger4, K. Lingel4, C. Prescott4, J. Rodriguez4, S. Yang4, J. Yelton4, G. Brandenburg5, D. Cinabro5, T. Liu5, M. Saulnier5, R. Wilson5, H. Yamamoto5, T. Bergfeld6, B. I. Eisenstein6, J. Ernst6, G. E. Gladding6, G. D. Gollin6, M. Palmer6, M. Selen6, J. J. Thaler6, K. W. Edwards7, K. W. McLean7, M. Ogg7, A. Bellerive8, D. I. Britton8, E. R. F. Hyatt8, R. Janicek8, D. B. MacFarlane8, P. M. Patel8, B. Spaan8, A. J. Sadoff9, R. Ammar10, P. Baringer10, A. Bean10, D. Besson10, D. Coppage10, N. Copty10, R. Davis10, N. Hancock10, S. Kotov10, I. Kravchenko10, N. Kwak10, Y. Kubota11, M. Lattery11, M. Momayezi11, J. K. Nelson11, S. Patton11, R. Poling11, V. Savinov11, S. Schrenk11, R. Wang11, M. S. Alam12, I. J. Kim12, Z. Ling12, A. H. Mahmood12, J. J. O'Neill12, H. Severini12, C. R. Sun12, F. Wappler12, G. Crawford13, R. Fulton13, D. Fujino13, K. K. Gan13, K. Honscheid13, H. Kagan13, R. Kass13, J. Lee13, M. Sung13, C. White13, A. Wolf13, M. M. Zoeller13, X. Fu14, B. Nemati14, W. R. Ross14, P. Skubic14, M. Wood14, M. Bishai15, J. Fast15, E. Gerndt15, J. W. Hinson15, T. Miao15, D. H. Miller15, M. Modesitt15, E. I. Shibata15, I. P. J. Shipsey15, P. N. Wang15, L. Gibbons16, S. D. Johnson16, Y. Kwon16, S. Roberts16, E. H. Thorndike16, T. E. Coan17, J. Dominick17, V. Fadeyev17, I. Korolkov17, M. Lambrecht17, S. Sanghera17, V. Shelkov17, T. Skwarnicki17, R. Stroynowski17, I. Volobouev17, G. Wei17, M. Artuso18, M. Gao18, M. Goldberg18, D. He18, N. Horwitz18, S. Kopp18, G. C. Moneti18, R. Mountain18, F. Muheim18, Y. Mukhin18, S. Playfer18, S. Stone18, X. Xing18, J. Bartelt19, S. E. Csorna19, V. Jain19, S. Marka19, D. Gibaut20, K. Kinoshita20, P. Pomianowski20, B. Barish21, M. Chadha21, S. Chan21, D. F. Cowen21, G. Eigen21, J. S. Miller21, C. O'Grady21, J. Urheim21, A. J. Weinstein21, F. Würthwein21, D. M. Asner22, M. Athanas22, D. W. Bliss22, W. S. Brower22, G. Masek22, and H. P. Paar22 (CLEO Collaboration)
1University of California, Santa Barbara, California 93106
2University of Colorado, Boulder, Colorado 80309-0390
3Cornell University, Ithaca, New York 14853
4University of Florida, Gainesville, Florida 32611
5Harvard University, Cambridge, Massachusetts 02138
6University of Illinois, Champaign-Urbana, Illinois 61801
7Carleton University, Ottawa, Ontario, Canada K1S 5B6
and Institute of Particle Physics, Montréal, Quebec, Canada
8McGill University, Montréal, Québec, Canada H3A 2T8
and Institute of Particle Physics, Montréal, Québec, Canada
9Ithaca College, Ithaca, New York 14850
10University of Kansas, Lawrence, Kansas 66045
11University of Minnesota, Minneapolis, Minnesota 55455
12State University of New York at Albany, Albany, New York 12222
13The Ohio State University, Columbus, Ohio 43210
14University of Oklahoma, Norman, Oklahoma 73019
15Purdue University, West Lafayette, Indiana 47907
16University of Rochester, Rochester, New York 14627
17Southern Methodist University, Dallas, Texas 75275
18Syracuse University, Syracuse, New York 13244
19Vanderbilt University, Nashville, Tennessee 37235
20Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
21California Institute of Technology, Pasadena, California 91125
22University of California, San Diego, La Jolla, California 92093
Received 21 July 1995
Using data collected with the CLEO II detector, we have observed the isospin-violating decay Ds*+→Ds+π0. The decay rate for this mode, relative to the dominant radiative decay, is found to be γ(Ds*+→Ds+π0)/γ(Ds*+→Ds+γ) = 0.062-0.018+0.020±0.022.
©1995 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.75.3232
DOI: 10.1103/PhysRevLett.75.3232
PACS: 13.25.Ft, 11.30.Hv, 14.40.Lb
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