منابع مشابه
Resonances from J / Ψ and Ψ ′ Decays
The Institute of High Energy Physics at Beijing runs an electron-positron collider (BEPC) with a general purpose solenoidal detector, the Beijing Spectrometer (BES)[1], which is designed to study exclusive final states in ee annihilations at the center of mass energy from 3000 to 5600 MeV. In this energy range, the largest cross sections are at the J/Ψ(3097) and Ψ(3686) resonant peaks. At prese...
متن کاملObservation of ψ ( 3770 ) → ππJ / ψ and Measurement of Γ ee ( ψ ( 2 S ) ) ∗
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,...
متن کاملOn the ηb → J/ψ J/ψ decay
It has been argued long ago that ηb could be observed through the ηb → J/ψ(→ μ+μ−)J/ψ(→ μ+μ−) decay chain. Recent calculations indicate that the width of ηb into two J/ψ is almost three order of magnitude smaller than the one into the DD. We study the effects of final state interactions due to the DD intermediate state on the J/ψ J/ψ final state. We find that the inclusion of this contribution ...
متن کاملRatio of Photoproduction Rates of J/ψ and ψ(2S)
There are different approaches for diffractive photoproduction of charmonia. Recently, a new approach is proposed, in which charm quarks are taken as heavy quarks and the nonperturbative effect related to charmonia can be handled with nonrelativistic QCD. The interaction between the cc̄ pair and the initial hadron is through exchange of soft gluons. The exchange of soft gluons can be studied wit...
متن کاملJ/ψ and Ψ Suppression in Hadronic Matter
We present a microscopic calculation of the breakup cross sections of J/ψ and ψ on pions and nucleons as a function of the kinetic energy. These cross sections are used for the investigation of the J/ψ to continuum and ψ/J/ψ ratios in ultrarelativistic heavy ion collisions. The contribution of produced comoving pions to the ψ/J/ψ signal is calculated. While this model can account for the data, ...
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ژورنال
عنوان ژورنال: Berichte der deutschen chemischen Gesellschaft
سال: 1891
ISSN: 0365-9496,1099-0682
DOI: 10.1002/cber.18910240258