Journal
EUROPEAN PHYSICAL JOURNAL C
Volume 59, Issue 3, Pages 675-681Publisher
SPRINGER
DOI: 10.1140/epjc/s10052-008-0812-2
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Funding
- National Natural Science Foundation [10775051]
- Program for New Century Excellent Talents in University [NCET-07-0282]
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In this article, we assume that there exist hidden charmed tetraquark states with spin-parity J (P)=1(-), and we calculate their masses with the QCD sum rules. The numerical result indicates that the masses of the vector hidden charmed tetraquark states are about M (Z) =(5.12 +/- 0.15) GeV or M (Z) =(5.16 +/- 0.16) GeV, which are inconsistent with the experimental data on the pi (+) chi (c1) invariant-mass distribution. The hidden charmed mesons Z (1), Z (2) or Z may be scalar hidden charmed tetraquark states, hadro-charmonium resonances or molecular states.
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