Phys. Rev. Lett.
84,
5038–5042
(2000)
Search for D0-D̅ 0 Mixing
R. Godang et al. (CLEO Collaboration)
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R. Godang1, K. Kinoshita1,*, I. C. Lai1, S. Schrenk1, G. Bonvicini2, D. Cinabro2, L. P. Perera2, G. J. Zhou2, G. Eigen3, E. Lipeles3, M. Schmidtler3, A. Shapiro3, W. M. Sun3, A. J. Weinstein3, F. Würthwein3,†, D. E. Jaffe4, G. Masek4, H. P. Paar4, E. M. Potter4, S. Prell4, V. Sharma4, D. M. Asner5, A. Eppich5, J. Gronberg5, T. S. Hill5, C. M. Korte5, R. Kutschke5, D. J. Lange5, R. J. Morrison5, H. N. Nelson5, C. Qiao5, A. Ryd5, H. Tajima5, M. S. Witherell5, R. A. Briere6, B. H. Behrens7, W. T. Ford7, A. Gritsan7, J. Roy7, J. G. Smith7, J. P. Alexander8, R. Baker8, C. Bebek8, B. E. Berger8, K. Berkelman8, F. Blanc8, V. Boisvert8, D. G. Cassel8, M. Dickson8, 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, C. D. Jones8, N. Katayama8, D. L. Kreinick8, M. Lohner8, A. Magerkurth8, T. O. Meyer8, N. B. Mistry8, C. R. Ng8, E. Nordberg8, J. R. Patterson8, D. Peterson8, D. Riley8, J. G. Thayer8, P. G. Thies8, B. Valant-Spaight8, A. Warburton8, P. Avery9, C. Prescott9, A. I. Rubiera9, J. Yelton9, J. Zheng9, G. Brandenburg10, A. Ershov10, Y. S. Gao10, D. Y.-J. Kim10, R. Wilson10, T. E. Browder11, Y. Li11, J. L. Rodriguez11, H. Yamamoto11, 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, C. Plager12, C. Sedlack12, M. Selen12, J. J. Thaler12, J. Williams12, K. W. Edwards13a,13b, R. Janicek14a,14b, P. M. Patel14a,14b, A. J. Sadoff15, R. Ammar16, A. Bean16, D. Besson16, R. Davis16, I. Kravchenko16, N. Kwak16, X. Zhao16, S. Anderson17, V. V. Frolov17, Y. Kubota17, S. J. Lee17, R. Mahapatra17, J. J. O'Neill17, R. Poling17, T. Riehle17, A. Smith17, J. Urheim17, S. Ahmed18, M. S. Alam18, S. B. Athar18, L. Jian18, L. Ling18, A. H. Mahmood18,‡, M. Saleem18, S. Timm18, F. Wappler18, A. Anastassov19, J. E. Duboscq19, K. K. Gan19, C. Gwon19, T. Hart19, K. Honscheid19, D. Hufnagel19, H. Kagan19, R. Kass19, T. K. Pedlar19, H. Schwarthoff19, J. B. Thayer19, E. von Toerne19, M. M. Zoeller19, S. J. Richichi20, H. Severini20, P. Skubic20, A. Undrus20, S. Chen21, J. Fast21, J. W. Hinson21, J. Lee21, N. Menon21, D. H. Miller21, E. I. Shibata21, I. P. J. Shipsey21, V. Pavlunin21, D. Cronin-Hennessy22, Y. Kwon22,§, A. L. Lyon22, E. H. Thorndike22, C. P. Jessop23, H. Marsiske23, M. L. Perl23, V. Savinov23, D. Ugolini23, X. Zhou23, T. E. Coan24, V. Fadeyev24, Y. Maravin24, I. Narsky24, R. Stroynowski24, J. Ye24, T. Wlodek24, M. Artuso25, R. Ayad25, C. Boulahouache25, K. Bukin25, E. Dambasuren25, S. Karamov25, S. Kopp25, G. Majumder25, G. C. Moneti25, R. Mountain25, S. Schuh25, T. Skwarnicki25, S. Stone25, G. Viehhauser25, J. C. Wang25, A. Wolf25, J. Wu25, S. E. Csorna26, I. Danko26, K. W. McLean26, Sz. Márka26, and Z. Xu26 (CLEO Collaboration)
1Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
2Wayne State University, Detroit, Michigan 48202
3California Institute of Technology, Pasadena, California 91125
4University of California, San Diego, La Jolla, California 92093
5University of California, Santa Barbara, California 93106
6Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
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
13aCarleton University, Ottawa, Ontario, Canada K15 5B6
13band the Institute of Particle Physics, Canada
14aMcGill University, Montréal, Québec, Canada H3A 2T
14band 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
19The Ohio 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
26Vanderbilt University, Nashville, Tennessee 37235
Received 3 January 2000; published in the issue dated 29 May 2000
We have studied the “wrong-sign” process D0→K+π- to search for D0-D̅ 0 mixing. The data come from 9.0fb-1 of e+e- collisions at √s≈10GeV recorded with the CLEO II.V detector. We measure the relative rate of the wrong-sign process D0→K+π- to the Cabibbo-favored process D̅ 0→K+π- to be R = (0.332-0.065+0.063±0.040)%. We study D0→K+π- as a function of decay time to distinguish direct doubly Cabibbo-suppressed decay from D0-D̅ 0 mixing. The amplitudes that describe D0-D̅ 0 mixing, x′ and y′, are consistent with zero. At the 95% C.L. and without assumptions concerning charge-parity ( CP) violating parameters, we find (1/2)x′2<0.041% and -5.8%<y′<1.0%.
© 2000 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.84.5038
DOI:
10.1103/PhysRevLett.84.5038
PACS:
13.25.Ft, 12.15.Mm, 14.40.Lb
*Permanent address: University of Cincinnati, Cincinnati, OH 45221. †Permanent address: Massachusetts Institute of Technology, Cambridge, MA 02139. ‡Permanent address: University of Texas–Pan American, Edinburg, TX 78539. §Permanent address: Yonsei University, Seoul 120-749, Korea.
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