摘要
We present a study of the X(3940) state in the process e+e - → J/ Ψ D*)D. The X(3940) mass and width are measured to be (3942 +7-6±6)MeV/c2 and F = (37 +26 -15 ±8)MeV. In the process e+e- → J/ Ψ D*) +D*)- we have observed another charmonium-like state, which we denote as X(4160), in the spectrum of invariant masses of D*) +D*)- combinations. The X(4160) parameters are M =(4156 +25-20±15)MeV/c2 and F = (139 +111- 61±21)MeV. The analysis is based on a data sample with an integrated luminosity of 693 fb-1 recorded near the γ(4S) resonance with the Belle detector at the KEKB e +e- asymmetric-energy collider.
原文 | ???core.languages.en_GB??? |
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出版狀態 | 已出版 - 2007 |
事件 | 23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007 - Daegu, Korea, Republic of 持續時間: 13 8月 2007 → 18 8月 2007 |
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???event.eventtypes.event.conference??? | 23rd International Symposium on Lepton-Photon Interactions at High Energy, LP 2007 |
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國家/地區 | Korea, Republic of |
城市 | Daegu |
期間 | 13/08/07 → 18/08/07 |