Phys. Rev. Lett.
99,
191801
(2007)
[6 pages]
Evidence for the Decay D0→K-π+π-e+νe
M. Artuso et al. CLEO Collaboration
Show All Authors/Affiliations
Hide All Authors/Affiliations
M. Artuso1, S. Blusk1, J. Butt1, J. Li1, N. Menaa1, R. Mountain1, S. Nisar1, K. Randrianarivony1, R. Sia1, T. Skwarnicki1, S. Stone1, J. C. Wang1, K. Zhang1, G. Bonvicini2, D. Cinabro2, M. Dubrovin2, A. Lincoln2, D. M. Asner3, K. W. Edwards3, P. Naik3, R. A. Briere4, T. Ferguson4, G. Tatishvili4, H. Vogel4, M. E. Watkins4, J. L. Rosner5, N. E. Adam6, J. P. Alexander6, D. G. Cassel6, J. E. Duboscq6, R. Ehrlich6, L. Fields6, R. S. Galik6, L. Gibbons6, R. Gray6, S. W. Gray6, D. L. Hartill6, B. K. Heltsley6, D. Hertz6, C. D. Jones6, J. Kandaswamy6, D. L. Kreinick6, V. E. Kuznetsov6, H. Mahlke-Krüger6, D. Mohapatra6, P. U. E. Onyisi6, J. R. Patterson6, D. Peterson6, J. Pivarski6, D. Riley6, A. Ryd6, A. J. Sadoff6, H. Schwarthoff6, X. Shi6, S. Stroiney6, W. M. Sun6, T. Wilksen6, S. B. Athar7, R. Patel7, V. Potlia7, J. Yelton7, P. Rubin8, C. Cawlfield9, B. I. Eisenstein9, I. Karliner9, D. Kim9, N. Lowrey9, M. Selen9, E. J. White9, J. Wiss9, R. E. Mitchell10, M. R. Shepherd10, D. Besson11, T. K. Pedlar12, D. Cronin-Hennessy13, K. Y. Gao13, J. Hietala13, Y. Kubota13, T. Klein13, B. W. Lang13, R. Poling13, A. W. Scott13, A. Smith13, P. Zweber13, S. Dobbs14, Z. Metreveli14, K. K. Seth14, A. Tomaradze14, J. Ernst15, K. M. Ecklund16, H. Severini17, W. Love18, V. Savinov18, O. Aquines19, A. Lopez19, S. Mehrabyan19, H. Mendez19, J. Ramirez19, G. S. Huang20, D. H. Miller20, V. Pavlunin20, B. Sanghi20, I. P. J. Shipsey20, B. Xin20, G. S. Adams21, M. Anderson21, J. P. Cummings21, I. Danko21, D. Hu21, B. Moziak21, J. Napolitano21, Q. He22, J. Insler22, H. Muramatsu22, C. S. Park22, E. H. Thorndike22, and F. Yang22 (CLEO Collaboration)
1Syracuse University, Syracuse, New York 13244, USA
2Wayne State University, Detroit, Michigan 48202, USA
3Carleton University, Ottawa, Ontario, Canada K1S 5B6
4Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
5Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
6Cornell University, Ithaca, New York 14853
7University of Florida, Gainesville, Florida 32611, USA
8George Mason University, Fairfax, Virginia 22030, USA
9University of Illinois, Urbana-Champaign, Illinois 61801, USA
10Indiana University, Bloomington, Indiana 47405, USA
11University of Kansas, Lawrence, Kansas 66045, USA
12Luther College, Decorah, Iowa 52101, USA
13University of Minnesota, Minneapolis, Minnesota 55455, USA
14Northwestern University, Evanston, Illinois 60208, USA
15State University of New York at Albany, Albany, New York 12222, USA
16State University of New York at Buffalo, Buffalo, New York 14260, USA
17University of Oklahoma, Norman, Oklahoma 73019, USA
18University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
19University of Puerto Rico, Mayaguez, Puerto Rico 00681
20Purdue University, West Lafayette, Indiana 47907, USA
21Rensselaer Polytechnic Institute, Troy, New York 12180, USA
22University of Rochester, Rochester, New York 14627, USA
Received 29 May 2007; published 5 November 2007
Using a 281 pb-1 data sample collected at the ψ(3770) with the CLEO-c detector, we present the first absolute branching fraction measurement of the decay D0→K-π+π-e+νe at a statistical significance of about 4.0 standard deviations. We find 10 candidates consistent with the decay D0→K-π+π-e+νe. The probability that a background fluctuation accounts for this signal is less than 4.1×10-5. We find B(D0→K-π+π-e+νe)=[2.8-1.1+1.4(stat)±0.3(syst)]×10-4. By restricting the invariant mass of the hadronic system to be consistent with K1(1270), we obtain the product of branching fractions B(D0→K1-(1270)e+νe)×B(K1-(1270)→K-π+π-)=[2.5-1.0+1.3(stat)±0.2(syst)]×10-4. Using B(K1-(1270)→K-π+π-)=(33±3)%, we obtain B(D0→K1-(1270)e+νe)=[7.6-3.0+4.1(stat)±0.6(syst)±0.7]×10-4. The last error accounts for the uncertainties in the measured K1-(1270)→K-π+π- branching fractions.
© 2007 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.191801
DOI:
10.1103/PhysRevLett.99.191801
PACS:
13.20.Fc, 12.38.Qk, 14.40.Lb
|
|
