Flux Tube Vibrations and the Excited Glue Spectroscopy
M.G. Olsson # , T.J. Allen # , and S. Veseli +
# Physics Department, University of Wisconsin, Madison, WI 53706
+ Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510
As a step toward a fundamental understanding of hybrid states we demonstrate the close relationship between the relativistic
string and lattice simulation results for excited glue states with two fixed color sources.
Because of the selfinteracting nature of the gluon it is
possible, even with fixed color (QQ) sources, to have an
infinite set of excited glue states. The known mesons and
baryons correspond to quark motion in the glue ground
state configuration. For excited glue a vastly richer
hadron spectrum of hybrid states then results, which can
have important experimental consequences.
Before serious models of hybrid spectroscopy are at
tempted, it is important to investigate the central ques
tion of possible glue states with fixed color charges. From
general symmetry considerations, the quantum glue can
be labeled by the angular momentum # = 0, 1, 2, . . .
along the QQ axis (denoted by #, #, #, . . . in molecu