Constraints on Extended Electroweak Theories
Abstract
We obtain a modelindependent lower bound on M(,R) of 300 GeV for a general class of SU(2)(,L) (CRTIMES) SU(2)(,R) (CRTIMES) U(1)(,BL) leftright theories without any assumptions about the structure of the CabibboKobayashiMaskawa matrices or the righthanded neutrino mass. Our result is also independent of Higgsboson, dispersive, and W(,L)W(,R) mixing contributions, and it holds for a range of bag constants, B. We also consider the minimal leftright symmetric electroweak model and characterize the range of allowable masses for the physical Higgs boson. We use two approaches: (1) We compute the lowest order bosonboson scattering amplitude and impose a unitarity constraint on the J = 0 partial wave amplitude; (2) We compute the radiative corrections to the Higgs propagator and determine the range of Higgs masses for which the perturbation series converges. Both methods give upper bounds on the Higgs masses in terms of the gauge boson masses, and we discuss the theoretical connection. The generalizations of these constraints and their applicability in light of previous bounds is examined.
 Publication:

Ph.D. Thesis
 Pub Date:
 1985
 Bibcode:
 1985PhDT........27O
 Keywords:

 LEFT RIGHT;
 Physics: Elementary Particles and High Energy