期刊
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
卷 41, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0954-3899/41/7/075003
关键词
sum rules; hadron mass models and calculations; perturbative calculations
资金
- National Natural Science Foundation of China [11347174, 11275268, 11105222, 11025242]
We investigate the nature of the recently observed narrow resonance Z(c)(3900), which is assumed to be a D*(D) overbar molecular state with quantum numbers I(G)J(P) = 1(+)1(+). Using QCD sum rules, we consider contributions up to dimension 8 in the operator product expansion and work at the leading order in alpha(s). The mass we arrived at is (3.88 +/- 0.17) GeV, which coincides with the mass of Z(c)(3900).
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