Phys. Rev. Lett.
87,
071802
(2001)
[5 pages]
Rate Measurement of D0→K+π-π0 and Constraints on D0-D0̅ Mixing
G. Brandenburg et al. (CLEO Collaboration)
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G. Brandenburg1, A. Ershov1, D. Y.-J. Kim1, R. Wilson1, T. Bergfeld2, B. I. Eisenstein2, J. Ernst2, G. E. Gladding2, G. D. Gollin2, R. M. Hans2, E. Johnson2, I. Karliner2, M. A. Marsh2, C. Plager2, C. Sedlack2, M. Selen2, J. J. Thaler2, J. Williams2, K. W. Edwards3a,3b, A. J. Sadoff4, R. Ammar5, A. Bean5, D. Besson5, X. Zhao5, S. Anderson6, V. V. Frolov6, Y. Kubota6, S. J. Lee6, R. Poling6, A. Smith6, C. J. Stepaniak6, J. Urheim6, S. Ahmed7, M. S. Alam7, S. B. Athar7, L. Jian7, L. Ling7, M. Saleem7, S. Timm7, F. Wappler7, A. Anastassov8, E. Eckhart8, K. K. Gan8, C. Gwon8, T. Hart8, K. Honscheid8, D. Hufnagel8, H. Kagan8, R. Kass8, T. K. Pedlar8, J. B. Thayer8, E. von Toerne8, M. M. Zoeller8, S. J. Richichi9, H. Severini9, P. Skubic9, A. Undrus9, V. Savinov10, S. Chen11, J. W. Hinson11, J. Lee11, D. H. Miller11, E. I. Shibata11, I. P. J. Shipsey11, V. Pavlunin11, D. Cronin-Hennessy12, A. L. Lyon12, E. H. Thorndike12, T. E. Coan13, V. Fadeyev13, Y. S. Gao13, Y. Maravin13, I. Narsky13, R. Stroynowski13, J. Ye13, T. Wlodek13, M. Artuso14, K. Benslama14, C. Boulahouache14, K. Bukin14, E. Dambasuren14, G. Majumder14, R. Mountain14, T. Skwarnicki14, S. Stone14, J. C. Wang14, A. Wolf14, S. Kopp15, M. Kostin15, A. H. Mahmood16, S. E. Csorna17, I. Danko17, K. W. McLean17, Z. Xu17, R. Godang18, G. Bonvicini19, D. Cinabro19, M. Dubrovin19, S. McGee19, G. J. Zhou19, A. Bornheim20, E. Lipeles20, S. P. Pappas20, A. Shapiro20, W. M. Sun20, A. J. Weinstein20, D. E. Jaffe21, R. Mahapatra21, G. Masek21, H. P. Paar21, D. M. Asner22, A. Eppich22, T. S. Hill22, R. J. Morrison22, H. N. Nelson22, R. A. Briere23, G. P. Chen23, T. Ferguson23, H. Vogel23, J. P. Alexander24, C. Bebek24, B. E. Berger24, K. Berkelman24, F. Blanc24, V. Boisvert24, D. G. Cassel24, P. S. Drell24, J. E. Duboscq24, K. M. Ecklund24, R. Ehrlich24, P. Gaidarev24, L. Gibbons24, B. Gittelman24, S. W. Gray24, D. L. Hartill24, B. K. Heltsley24, L. Hsu24, C. D. Jones24, J. Kandaswamy24, D. L. Kreinick24, M. Lohner24, A. Magerkurth24, T. O. Meyer24, N. B. Mistry24, E. Nordberg24, M. Palmer24, J. R. Patterson24, D. Peterson24, D. Riley24, A. Romano24, H. Schwarthoff24, J. G. Thayer24, D. Urner24, B. Valant-Spaight24, G. Viehhauser24, A. Warburton24, P. Avery25, C. Prescott25, A. I. Rubiera25, H. Stoeck25, and J. Yelton25 (CLEO Collaboration)
1Harvard University, Cambridge, Massachusetts 02138
2University of Illinois, Urbana-Champaign, Illinois, 61801
3aCarleton University, Ottawa, Ontario, Canada K1S 5B6
3band the Institute of Particle Physics, Canada
4Ithaca College, Ithaca, New York 14850
5University of Kansas, Lawrence, Kansas 66045
6University of Minnesota, Minneapolis, Minnesota 55455
7State University of New York at Albany, Albany, New York 12222
8The Ohio State University, Columbus, Ohio 43210
9University of Oklahoma, Norman, Oklahoma 73019
10University of Pittsburgh, Pittsburgh, Pennsylvania 15260
11Purdue University, West Lafayette, Indiana 47907
12University of Rochester, Rochester, New York 14627
13Southern Methodist University, Dallas, Texas 75275
14Syracuse University, Syracuse, New York 13244
15University of Texas, Austin, Texas 78712
16University of Texas–Pan American, Edinburg, Texas 78539
17Vanderbilt University, Nashville, Tennessee 37235
18Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
19Wayne State University, Detroit, Michigan 48202
20California Institute of Technology, Pasadena, California 91125
21University of California, San Diego, La Jolla, California 92093
22University of California, Santa Barbara, California 93106
23Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
24Cornell University, Ithaca, New York 14853
25University of Florida, Gainesville, Florida 32611
Received 30 April 2001; published 26 July 2001
We present an observation and time-integrated rate measurement of the decay D0→K+π-π0 produced in 9fb-1 of e+e- collisions near the ϒ(4S) resonance. The signal is inconsistent with an upward fluctuation of the background by 4.9 standard deviations. We measured the time-integrated rate of D0→K+π-π0 normalized to the rate of D0̅ →K+π-π0 to be 0.0043-0.0010+0.0011(stat)±0.0007(syst). This decay can be produced by doubly Cabibbo-suppressed decays or by the D0 evolving into a D0̅ through mixing, followed by a Cabibbo-favored decay to K+π-π0. We also found the CP asymmetry A = (9-22+25)% be consistent with zero.
© 2001 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.87.071802
DOI:
10.1103/PhysRevLett.87.071802
PACS:
13.25.Ft, 12.15.Ff, 12.60.-i, 14.40.Lb
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