Chiral structure of vector and axial-vector tetraquark currents

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.