Measurement of interference between electromagnetic and strong amplitudes in ψ(2S) decays to two pseudoscalar mesons

S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, H. Severini, S. A. Dytman, W. Love, S. Mehrabyan, V. Savinov, O. Aquines, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. SanghiI. P.J. Shipsey, B. Xin, G. S. Adams, M. Anderson, J. P. Cummings, I. Danko, J. Napolitano, Q. He, J. Insler, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, R. Stroynowski, M. Artuso, S. Blusk, J. Butt, J. Li, N. Menaa, R. Mountain, S. Nisar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, A. Lincoln, D. M. Asner, K. W. Edwards, R. A. Briere, I. Brock, J. Chen, T. Ferguson, G. Tatishvili, H. Vogel, M. E. Watkins, J. L. Rosner, N. E. Adam, J. P. Alexander, K. Berkelman, D. G. Cassel, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, R. Gray, S. W. Gray, D. L. Hartill, B. K. Heltsley, D. Hertz, C. D. Jones, J. Kandaswamy, D. L. Kreinick, V. E. Kuznetsov, H. Mahlke-Krüger, T. O. Meyer, P. U.E. Onyisi, J. R. Patterson, D. Peterson, E. A. Phillips, J. Pivarski, D. Riley, A. Ryd, A. J. Sadoff, H. Schwarthoff, X. Shi, S. Stroiney, W. M. Sun, T. Wilksen, M. Weinberger, S. B. Athar, P. Avery, L. Breva-Newell, R. Patel, V. Potlia, H. Stoeck, J. Yelton, P. Rubin, C. Cawlfield, B. I. Eisenstein, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Wiss, M. R. Shepherd, D. Besson, T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, R. Poling, A. W. Scott, A. Smith

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Abstract

Using a sample of 3.08×106 ψ(2S) decays collected at s=3.686GeV 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.

Original languageEnglish (US)
Article number011105
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume74
Issue number1
DOIs
StatePublished - Jul 27 2006

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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    Dobbs, S., Metreveli, Z., Seth, K. K., Tomaradze, A., Zweber, P., Ernst, J., Severini, H., Dytman, S. A., Love, W., Mehrabyan, S., Savinov, V., Aquines, O., Li, Z., Lopez, A., Mendez, H., Ramirez, J., Huang, G. S., Miller, D. H., Pavlunin, V., ... Smith, A. (2006). Measurement of interference between electromagnetic and strong amplitudes in ψ(2S) decays to two pseudoscalar mesons. Physical Review D - Particles, Fields, Gravitation and Cosmology, 74(1), [011105]. https://doi.org/10.1103/PhysRevD.74.011105