View source for Chiral color

{{essay-entry|date=December 2011}}

In [[particle physics phenomenology]], '''chiral color''' is a [[model building (particle physics)|speculative model]]<ref>{{cite journal| author=Paul H. Frampton |author2=Sheldon L. Glashow| title=Chiral Color: An Alternative to the Standard Model| journal=[[Physics Letters B]]| volume=190| issue=1–2| pages=157–161| year=1987| doi=10.1016/0370-2693(87)90859-8|bibcode = 1987PhLB..190..157F }}</ref> which extends [[quantum chromodynamics]] (QCD), the generally accepted theory for the strong interactions of [[quark]]s. QCD is a [[gauge field theory]] based on a [[gauge group]] known as color SU(3)<sub>C</sub> with an octet of colored [[gluon]]s acting as the force carriers between a triplet of colored quarks.

In Chiral Color, QCD is extended to a gauge group which is SU(3)<sub>L</sub> × SU(3)<sub>R</sub> and leads to a second octet of force carriers. SU(3)<sub>C</sub> is identified with a [[diagonal subgroup]] of these two factors. The gluons correspond to the unbroken gauge bosons and the color octet axigluons – which couple strongly to the quarks – are massive. Hence the name is Chiral Color. Although Chiral Color has presently no experimental support, it has the "aesthetic" advantage of rendering the Standard Model more similar in its treatment of the two short range forces, strong and weak interactions.

Unlike gluons, the axigluons are predicted to be massive. Extensive searches for axigluons at [[CERN]]<ref>{{cite journal| author=C. Albajar |collaboration=UA1 collaboration | title=Two-jet mass distributions at the CERN proton-antiproton collider| journal=[[Physics Letters B]]| volume=209| issue=1| pages=127–134| year=1988| doi=10.1016/0370-2693(88)91843-6|bibcode = 1988PhLB..209..127A | url=https://cds.cern.ch/record/187284}}</ref> and [[Fermilab]]<ref>
{{cite journal| author=F. Abe |collaboration=CDF Collaboration | title=Two-jet invariant mass distribution at s1/2 = 1.8 TeV| journal=[[Physical Review D]]| volume=41| pages=1722–1725| year=1990| doi=10.1103/PhysRevD.41.1722|bibcode = 1990PhRvD..41.1722A| issue=5 |pmid = 10012538| url=https://zenodo.org/record/1233785}}</ref><ref>{{cite journal| author=F. Abe |collaboration=CDF Collaboration | title=Search for new particles decaying to dijets at CDF| journal=[[Physical Review D]]| volume=55| pages=R5263–R5268| year=1997| doi=10.1103/PhysRevD.55.R5263|arxiv = hep-ex/9702004 |bibcode = 1997PhRvD..55.5263A| issue=9 | s2cid=119443342}}</ref> have placed a lower bound on the axigluon mass of about {{val|1|ul=TeV}}. [[Axigluon]]s may be discovered when collisions are studied with higher energy at the [[Large Hadron Collider]].

==References==
{{Reflist}}

{{DEFAULTSORT:Chiral Color}}
[[Category:Physics beyond the Standard Model]]


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