Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 62, Issue 2, Pages 375-382Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-009-1043-x
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Funding
- National Natural Science Foundation [10775051]
- Program for New Century Excellent Talents in University [NCET-070282]
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In this article, we assume that there exists a scalar hidden charm tetraquark state in the pi(+)chi(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 D-1(+)(D) over bar (0) + D+(D) over bar (0)(1) molecular state, are not excluded.
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