https://doi.org/10.1140/epjc/s10052-009-1043-x
Regular Article - Theoretical Physics
Another tetraquark structure in the π + χ c1 invariant mass distribution
Department of Physics, North China Electric Power University, Baoding, 071003, People’s Republic of China
* e-mail: wangzgyiti@yahoo.com.cn
Received:
24
December
2008
Revised:
20
March
2009
Published online:
20
May
2009
In this article, we assume that there exists a scalar hidden charm tetraquark state in the π
+
χ
c1 invariant mass distribution, and we study its mass using the QCD sum rules. The numerical result M
Z
=(4.36±0.18) GeV is consistent with the mass of the Z(4250). The Z(4250) may be a tetraquark state, but other possibilities, such as a hadro-charmonium resonance and a
molecular state, are not excluded.
PACS: 12.39.Mk – / 12.38.Lg –
© Springer-Verlag , 2009
