The Quark mass spectrum in the universal seesaw model

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Persistent URL	http://purl.org/net/epubs/work/25357
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Record Id	25357
Title	The Quark mass spectrum in the universal seesaw model
Contributors	S Ranfone (SERC Rutherford Appleton Lab.)
Abstract	In the context of a Universal Seesaw model implemented in a left-right symmetric theory, we show that, by allowing the two left-handed doublet Higgs fields to develop different vacuum-expectation-values (VEV's), it is possible to account for the observed structure of the quark mass spectrum without the need of any hierarchy among the Yukawa couplings. In this framework the top-quark mass is expected to be of the order of its present experimental lower bound, mt ~ 90 to 100 GeV. Moreover, we find that, while one of the Higgs doublets gets essentially the "standard model" VEV of approximately 250 GeV, the second doublet is expected to have a much smaller VEV, of order 10 GeV. The identification of the large mass scale of the model with the Peccei-Quinn scale fixes the mass of the right-handed gauge bosons in the range 107 to 1010 GeV, far beyond the reach of present collider experiments. Also all FCNC processes are consequently suppressed, in agreement with the present bounds.
Organisation	SERC
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Report	RAL Technical Reports RAL-93-020. 1993.		RAL-TR-1993-020.pdf	1993