ar X iv : 0 80 7 . 45 92 v 1 [ he p - ph ] 2 9 Ju l 2 00 8 Another tetraquark structure in the π + χ c 1 invariant mass distribution Zhi -
نویسنده
چکیده
In this article, we interpolate the vector hidden charmed tetraquark state with the Cγ5 − Cγμγ5 type current, and calculate its mass with the QCD sum rules. The numerical result indicates that the mass is about MZ = (4.09 ± 0.11)GeV, while the C − Cγμ type interpolating current leads to the mass aboutMZ = (4.22±0.10)GeV; they are consistent with the experimental data on the πχc1 invariant mass distribution. The hidden charmed mesons Z1 and Z2 can be tentatively identified as tetraquark states. PACS number: 12.39.Mk, 12.38.Lg
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