CHIRAL COLOR AND AXIGLUON
[147] "Chiral Color: An Alternative to the Standard Model"
by P.H. Frampton and S.L. Glashow
Phys. Lett. 190B 157 (1987).
During the academic year 1986-87 I was on leave at Boston University
(BU). Also at BU that year (and now, since 2000, permanently) was Shelly
Glashow. We worked together on a theory of the strong interactions in
which a chiral color SU(3) X SU(3) gauge group is spontaneously broken
to the diagonal subgroup interpreted as the color SU(3) of QCD. This
symmetry breaking gives rise to eight color-octet axigluons which couple
axially to quarks. It is natural, but not essential, to assume that the
chiral color breaking takes place at approximately the weak scale in which
case the axigluon mass was predicted to be a "few hundred" GeV.
The axigluon was sought at CERN in C. Albajar et al. (UA1 Collaboration)
Phys. Lett. B209, 127 (1988) and at FermiLab in F. Abe et al. (CDF
Collaboration) Phys. Rev. D41, 1722 (1990). The axigluon was not discovered
in those experiments.
So far, the best lower bound on the axigluon mass is that reported by the CDF
Collaboration in F. Abe et al. Phys.Rev. D55, R5263 (1997).
This lower bound is 980 GeV which is above the prediction of the minimal chiral
color model but if we relax the assumption made in paper [147] that "the scale of
chiral color breaking is the same as the scale of electroweak breaking" the
axigluon can be arbitrarily massive, e.g. above 980 GeV.
The axigluon, like the
bilepton discussed on another of these pages, could be
produced and detected at the Large Hadron Collider (LHC).
Open question about axigluon:
Does the axigluon exist in the real world?
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