Phys. Rev. D
74,
011105(R)
(2006)
[5 pages]
Measurement of interference between electromagnetic and strong amplitudes in ψ(2S) decays to two pseudoscalar mesons
S. Dobbs et al. CLEO Collaboration
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S. Dobbs1, Z. Metreveli1, K. K. Seth1, A. Tomaradze1, P. Zweber1, J. Ernst2, H. Severini3, S. A. Dytman4, W. Love4, S. Mehrabyan4, V. Savinov4, O. Aquines5, Z. Li5, A. Lopez5, H. Mendez5, J. Ramirez5, G. S. Huang6, D. H. Miller6, V. Pavlunin6, B. Sanghi6, I. P. J. Shipsey6, B. Xin6, G. S. Adams7, M. Anderson7, J. P. Cummings7, I. Danko7, J. Napolitano7, Q. He8, J. Insler8, H. Muramatsu8, C. S. Park8, E. H. Thorndike8, T. E. Coan9, Y. S. Gao9, F. Liu9, R. Stroynowski9, M. Artuso10, S. Blusk10, J. Butt10, J. Li10, N. Menaa10, R. Mountain10, S. Nisar10, K. Randrianarivony10, R. Redjimi10, R. Sia10, T. Skwarnicki10, S. Stone10, J. C. Wang10, K. Zhang10, S. E. Csorna11, G. Bonvicini12, D. Cinabro12, M. Dubrovin12, A. Lincoln12, D. M. Asner13, K. W. Edwards13, R. A. Briere14, I. Brock14, J. Chen14, T. Ferguson14, G. Tatishvili14, H. Vogel14, M. E. Watkins14, J. L. Rosner15, N. E. Adam16, J. P. Alexander16, K. Berkelman16, D. G. Cassel16, J. E. Duboscq16, K. M. Ecklund16, R. Ehrlich16, L. Fields16, R. S. Galik16, L. Gibbons16, R. Gray16, S. W. Gray16, D. L. Hartill16, B. K. Heltsley16, D. Hertz16, C. D. Jones16, J. Kandaswamy16, D. L. Kreinick16, V. E. Kuznetsov16, H. Mahlke-Krüger16, T. O. Meyer16, P. U. E. Onyisi16, J. R. Patterson16, D. Peterson16, E. A. Phillips16, J. Pivarski16, D. Riley16, A. Ryd16, A. J. Sadoff16, H. Schwarthoff16, X. Shi16, S. Stroiney16, W. M. Sun16, T. Wilksen16, M. Weinberger16, S. B. Athar17, P. Avery17, L. Breva-Newell17, R. Patel17, V. Potlia17, H. Stoeck17, J. Yelton17, P. Rubin18, C. Cawlfield19, B. I. Eisenstein19, I. Karliner19, D. Kim19, N. Lowrey19, P. Naik19, C. Sedlack19, M. Selen19, E. J. White19, J. Wiss19, M. R. Shepherd20, D. Besson21, T. K. Pedlar22, D. Cronin-Hennessy23, K. Y. Gao23, D. T. Gong23, J. Hietala23, Y. Kubota23, T. Klein23, B. W. Lang23, R. Poling23, A. W. Scott23, and A. Smith23 (CLEO Collaboration)
1Northwestern University, Evanston, Illinois 60208, USA
2State University of New York at Albany, Albany, New York 12222, USA
3University of Oklahoma, Norman, Oklahoma 73019, USA
4University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
5University of Puerto Rico, Mayaguez, Puerto Rico 00681
6Purdue University, West Lafayette, Indiana 47907, USA
7Rensselaer Polytechnic Institute, Troy, New York 12180, USA
8University of Rochester, Rochester, New York 14627, USA
9Southern Methodist University, Dallas, Texas 75275, USA
10Syracuse University, Syracuse, New York 13244, USA
11Vanderbilt University, Nashville, Tennessee 37235, USA
12Wayne State University, Detroit, Michigan 48202, USA
13Carleton University, Ottawa, Ontario, Canada K1S 5B6
14Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
15Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA
16Cornell University, Ithaca, New York 14853
17University of Florida, Gainesville, Florida 32611, USA
18George Mason University, Fairfax, Virginia 22030, USA
19University of Illinois, Urbana-Champaign, Illinois 61801, USA
20Indiana University, Bloomington, Indiana 47405, USA
21University of Kansas, Lawrence, Kansas 66045, USA
22Luther College, Decorah, Iowa 52101, USA
23University of Minnesota, Minneapolis, Minnesota 55455, USA
Received 8 March 2006; published 20 July 2006
Using a sample of 3.08×106 ψ(2S) decays collected at √s=3.686 GeV with the CLEO detector at the Cornell Electron Storage Ring, we have measured the branching fractions for ψ(2S) decays to pseudoscalar pairs π+π-, K+K- and KS0KL0. We obtain B(ψ(2S)→π+π-)<2.1×10-5 (90% C.L.), B(ψ(2S)→K+K-)=(6.3±0.6(stat)±0.3(syst))×10-5, and B(ψ(2S)→KS0KL0)=(5.8±0.8(stat)±0.4(syst))×10-5. The branching fractions allow extraction of the relative phase Δ=(95±15)° and strength ratio R=(2.5±0.4) of the three-gluon and one-photon amplitudes for these modes.
© 2006 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.74.011105
DOI:
10.1103/PhysRevD.74.011105
PACS:
13.25.Gv, 12.38.Qk, 14.40.Gx
Current address: Universität Bonn, Nussallee 12, D-53115 Bonn, Germany
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