Regular Article - Theoretical Physics
Chiral structure of vector and axial-vector tetraquark currents
School of Physics and Nuclear Energy Engineering and International Research Center for Nuclei and Particles in the Cosmos, Beihang University, Beijing, 100191, China
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Revised: 15 October 2013
Published online: 8 November 2013
We investigate the chiral structure of local vector and axial-vector tetraquark currents, and study their chiral transformation properties. We consider the charge-conjugation parity and classify all the isovector vector and axial-vector local tetraquark currents of quantum numbers I G J PC =1−1−+, I G J PC =1+1−−, I G J PC =1−1++ and I G J PC =1+1+−. We find that there is a one to one correspondence among them. Using these currents, we perform QCD sum rule analyses. Our results suggest that there is a missing b 1 state having I G J PC =1+1+− and a mass around 1.47–1.66 GeV.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013