Third generation masses from a two Higgs model fixed point

The large mass ratio between the top and bottom quarks may be attributed to a hierarchy in the vacuum expectation values of scalar doublets. We consider an effective renormalisation group fixed point determination of the quartic scalar and third generation Yukawa couplings in such a two doublet mode...

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Bibliographic Details
Published in:Physics letters. B 1990-10, Vol.249 (2), p.273-280
Main Authors: Froggatt, C.D., Knowles, I.G., Moorhouse, R.G.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Physics
Quantum ensemble theory
Quantum statistical mechanics
Statistical physics, thermodynamics, and nonlinear dynamical systems
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Summary:The large mass ratio between the top and bottom quarks may be attributed to a hierarchy in the vacuum expectation values of scalar doublets. We consider an effective renormalisation group fixed point determination of the quartic scalar and third generation Yukawa couplings in such a two doublet model. This predicts a mass m t=220 GeV and a mass ratio m b/ m τ =2.6. In this simplest form the model also predicts the scalar masses, including a light scalar with a mass of order the b quark mass. Experimental implications are discussed.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(90)91255-A