The masses of the 0++ and 0-+ light-quark hybrids using QCD sum rules
Tao Huang1,2 - Hongying Jin2,3 - Ailin Zhang2
1 CCAST (World Laboratory), P.O. Box 8730, Beijing, 100080,
2 Institute of High Energy Physics, P.O. Box 918, Beijing, 100039, P.R. China
3 Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, Illinois 60510, USA
Received: 17 July 1998 / Revised version: 11 September 1998 / Published online: 15 April 1999
We calculate the masses of the light-quark hybrid mesons with the quantum numbers 0++ and 0-+ by using the QCD sum rules. Two kinds of interpolated currents with the same quantum numbers are employed. We find that approximately equal masses are predicted for the 0-+ hybrid state using the different currents, and different masses are obtained for the 0++ hybrid state using the different currents. The prediction depends on the interaction between the gluon and the quarks in the low-lying hybrid mesons. The mixing effect on the mass of the light-quark hybrid mesons through the low-energy theorem has also been examined, and it is found that this mixing shifts the masses of the hybrid mesons and the glueball a little.