DOI 10.1007/s100529901071
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,
P.R. China
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
Abstract
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.
Copyright Springer-Verlag
