Observation of ψ ( 3770 ) → ππJ / ψ and Measurement of Γ ee ( ψ ( 2 S ) ) ∗
نویسندگان
چکیده
T. K. Pedlar, D. Cronin-Hennessy, K. Y. Gao, D. T. Gong, J. Hietala, Y. Kubota, T. Klein, B. W. Lang, S. Z. Li, R. Poling, A. W. Scott, A. Smith, S. Dobbs, Z. Metreveli, K. K. Seth, A. Tomaradze, P. Zweber, J. Ernst, H. Severini, D. M. Asner, S. A. Dytman, W. Love, S. Mehrabyan, J. A. Mueller, V. Savinov, Z. Li, A. Lopez, H. Mendez, J. Ramirez, G. S. Huang, D. H. Miller, V. Pavlunin, B. Sanghi, I. P. J. Shipsey, G. S. Adams, M. Cravey, J. P. Cummings, I. Danko, J. Napolitano, Q. He, H. Muramatsu, C. S. Park, E. H. Thorndike, T. E. Coan, Y. S. Gao, F. Liu, M. Artuso, C. Boulahouache, S. Blusk, J. Butt, O. Dorjkhaidav, J. Li, N. Menaa, R. Mountain, R. Nandakumar, K. Randrianarivony, R. Redjimi, R. Sia, T. Skwarnicki, S. Stone, J. C. Wang, K. Zhang, S. E. Csorna, G. Bonvicini, D. Cinabro, M. Dubrovin, R. A. Briere, G. P. Chen, 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, V. Crede, J. E. Duboscq, K. M. Ecklund, R. Ehrlich, L. Fields, R. S. Galik, L. Gibbons, B. Gittelman, 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, M. R. Shepherd, S. Stroiney, W. M. Sun, D. Urner, T. Wilksen, K. M. Weaver, 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, G. D. Gollin, I. Karliner, D. Kim, N. Lowrey, P. Naik, C. Sedlack, M. Selen, E. J. White, J. Williams, J. Wiss, K. W. Edwards, and D. Besson
منابع مشابه
Ψ ′ ′ Decays to Charmless Final States 1
The ψ ≡ ψ(3770) particle, lying just above DD̄ threshold, is a well-defined source of charmed particle pairs in ee collisions. It is now undergoing high-intensity studies at the CLEO Detector at Cornell [1] and the BES Detector in China [2]. Its couplings to charmless states are of interest for several reasons. (1) The production and decays of ψ depend on its composition of D1, S1, and DD̄ contin...
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The large decay rate observed by Belle for B+ → ψ(3770)K+, which is comparable to B+ → ψ(3686)K+, might indicate either an unexpectedly large S-D mixing angle |θ| ≈ 40o or the leading role of the color-octet mechanism in D-wave charmonium production in B decay. By calculating the production rate of ψ(3770) in the continuum e+e− annihilation at √ s = 10.6 GeV with these two possible approaches (...
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Measurements of branching fractions for ψ(2S) decays into ωππ, b1π, ωf2(1270), ωKK, ωpp̄, φππ, φf0(980), φK K, and φpp̄ final states, based on a data sample of (4.02 ± 0.22) × 10 ψ(2S) events collected with the BESI detector at the Beijing ElectronPositron Collider, are reported. Using the same event sample, radiative decays of the radially excited charmonium resonance, ψ(2S), into ππ, KK and ηη ...
متن کاملun 2 00 1 Charmless final states and S – D - wave mixing in the ψ ′ ′ 1
The ψ = ψ(3770) resonance is expected to be mainly cc̄(1D1), but tensor forces and coupling to charmed particle pairs can mix it with ψ(2S1) and other states. Implications of this mixing for decays of ψ to non-charmed final states are discussed. (i) The ratio Γ(ψ → γ + χc2)/Γ(ψ′′ → γ + χc0) is expected to be highly suppressed if ψ is a pure D-wave state, and is enchanced by mixing. (ii) The expe...
متن کاملar X iv : h ep - p h / 01 05 32 7 v 1 3 0 M ay 2 00 1 Charmless final states and S – D - wave mixing in the ψ ′ ′ 1 Jonathan
The ψ = ψ(3770) resonance is expected to be mainly cc̄(1D1), but tensor forces and coupling to charmed particle pairs can mix it with ψ(2S1) and other states. Implications of this mixing for decays of ψ to non-charmed final states are discussed. (i) The ratio Γ(ψ → γ + χc2)/Γ(ψ′′ → γ + χc0) is expected to be highly suppressed if ψ is a pure D-wave state, and is enchanced by mixing. (ii) The expe...
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The DsD ∗ s , D ∗D∗, and D∗ sD ∗ s P -wave channels in the energy region of the Y (4260) charmonium structure are studied in a coupled-channel model applied to J = 1−− cc̄ resonances. The three channels exhibit enhancements that peak at 4.27 GeV, 4.26 GeV, and 4.33 GeV, respectively, having widths ranging from 80 to 200 MeV. However, no S-matrix poles are found, other than those associated with ...
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