A ug 2 00 8 Another tetraquark structure in the π + χ c 1 invariant mass distribution
نویسنده
چکیده
In this article, we assume that the mesons in the πχc1 invariant mass distribution are scalar hidden charmed tetraquark states and calculate their masses with the QCD sum rules. The numerical result indicates that the masses are about MZ = (4.48 ± 0.12)GeV. In previous work, we observe that the masses of the vector hidden charmed tetraquark states are about MZ = (4.81±0.11)GeV or MZ = (4.83±0.12)GeV. They are all inconsistent with the experimental data on the πχc1 invariant mass distribution. The hidden charmed mesons Z1 and Z2 in the π χc1 invariant mass distribution cannot be tetraquark states, they may be the hadro-charmonium resonances or P -wave D+D̄0 molecular states. PACS number: 12.39.Mk, 12.38.Lg
منابع مشابه
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تاریخ انتشار 2009