In this Review paper in p.1462, bottom left: Rev.Mod.Phys.80:1455-1515,2008 -- Color superconductivity in dense quark matter
It says that "There is an associated gauge-invariant 6-quark order parameter with the flavor and color structure of two Lambda baryons,
⟨ΛΛ⟩
where
this order parameter distinguishes the color flavor locking (CFL) phase from the quark gluon plsma QGP.
I suppose that it means the 6 quark condensate is
⟨(ϵabcϵijkψaiψbjψck)(ϵa′b′c′ϵi′j′k′ψ′aiψ′bjψ′ck)⟩,
but how does this distinguish CFL from QGP?
Is this operator precise? And is this gauge invariant under SU(3)???
It is a Lorentz scalar or pseudo scalar?
It seems that the claim is not clear.
This post imported from StackExchange Physics at 2020-11-05 13:26 (UTC), posted by SE-user annie marie heart