The c̄c purity of ψ ( 3770 ) and ψ ′ challenged
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S-D mixing and ψ(3770) production in e+e− annihilation and B decay and its radiative transitions
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 (...
متن کاملar X iv : h ep - e x / 02 10 06 3 v 2 2 7 Ju l 2 00 4 The Interference between Virtual Photon and 1 − − Charmonium in e + e − Experiment
e + e − experiments producing charmonium are reviewed. It is found that the contribution of the continuum amplitude via virtual photon was neglected in almost all the experiments and the channels analyzed. It is shown that the contribution of the continuum part may affect the final results significantly in ψ(2S) and ψ(3770) decays, while the interference between continuum and resonance amplitud...
متن کاملar X iv : h ep - e x / 04 07 05 5 v 1 3 0 Ju l 2 00 4 The Interference between Virtual Photon and 1 − − Charmonium in e + e − Experiment
e + e − experiments producing charmonium are reviewed. It is found that the contribution of the continuum amplitude via virtual photon was neglected in almost all the experiments and the channels analyzed. It is shown that the contribution of the continuum part may affect the final results significantly in ψ(2S) and ψ(3770) decays, while the interference between continuum and resonance amplitud...
متن کاملQuantum entanglement at the ψ ( 3770 ) and Υ ( 4 S )
We review results which explicitly depend on the entanglement of neutral meson pairs produced at the ψ(3770) and Υ(4S). Time-dependent CP-violation analyses at the B-factories use the flavour-singlet final state at the Υ(4S), but by assuming its quantum-mechanical evolution; Belle on the other hand has tested the timedependent flavour correlation of the B-mesons, comparing predictions of quantu...
متن کاملIn - medium spectral functions of charmonia studied by p̄ + A reactions ⋆
We study the perspectives of resonant charmonium production in p̄ + A reactions within the Multiple Scattering Monte Carlo (MSMC) approach. We calculate the production of the resonances Ψ(2S) and Ψ(3770) on various nuclei, their propagation and decay to dileptons and D+D̄ in the medium and vacuum, respectively, employing parametrizations for the D, D̄ self energies taken from QCD sum rule studies....
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تاریخ انتشار 2005