We report results of experiments performed with the KEDR detector at the VEPP-4M e^＋e^- collider. They include precise measurement of the D^0 and D^± meson masses, determination of the ψ（3770） resonance param...We report results of experiments performed with the KEDR detector at the VEPP-4M e^＋e^- collider. They include precise measurement of the D^0 and D^± meson masses, determination of the ψ（3770） resonance parameters, and a search for narrow resonances in e^＋e^- annihilation at center-of-mass energies between 1.85 and 3.1 GeV.展开更多
We report the progress on understanding some of those existing puzzles in charmonium decays.We show that the intermediate meson loops （IML） as a long-distance transition mechanism will provide novel insights into th...We report the progress on understanding some of those existing puzzles in charmonium decays.We show that the intermediate meson loops （IML） as a long-distance transition mechanism will provide novel insights into these issues.In particular,we show that the IML mechanism would be essentially important for understanding the ψ（3770） non-DD decays.We also comment that such a mechanism is correlated with the Okubo-Zweig-Iizuka （OZI） rule evasions in charmonium hadronic decays.展开更多
基金Supported by Russian Foundation for Basic Research,Grant 04-02-16712,07-02-00816,07-02-01162RF Presidential Grant for Sc.Sch.NSh-5655.2008.2
文摘We report results of experiments performed with the KEDR detector at the VEPP-4M e^＋e^- collider. They include precise measurement of the D^0 and D^± meson masses, determination of the ψ（3770） resonance parameters, and a search for narrow resonances in e^＋e^- annihilation at center-of-mass energies between 1.85 and 3.1 GeV.
基金Supported by National Natural Science Foundation of China (10675131,10491306)Chinese Academy of Sciences (KJCX3-SYW-N2)Ministry of Science and Technology of China (2009CB825200)
文摘We report the progress on understanding some of those existing puzzles in charmonium decays.We show that the intermediate meson loops （IML） as a long-distance transition mechanism will provide novel insights into these issues.In particular,we show that the IML mechanism would be essentially important for understanding the ψ（3770） non-DD decays.We also comment that such a mechanism is correlated with the Okubo-Zweig-Iizuka （OZI） rule evasions in charmonium hadronic decays.
