Unitarity constraints on scalar parameters of the Standard and Two Higgs Doublets Model
Abstract
Unitarity constraints on the scalar parameters both for the Standard Model and the general Two Higgs Doublet Model (THDM) are examined. In the case of the THDM with an exact discrete symmetry transformation, we show that the mass of the lightest CPeven Higgs boson ($M_h$) and $\tan\beta$ are strongly correlated and consequently a strong lower bound can be put on $M_h$ for large $\tan\beta$. It is also shown that the inclusion of the discrete symmetry breaking term relaxes the aforementioned correlation.
 Publication:

arXiv eprints
 Pub Date:
 December 2000
 arXiv:
 arXiv:hepph/0012353
 Bibcode:
 2000hep.ph...12353A
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 16 pages, latex, 1 ps figures. Based on hepph/0006035. To be published in the proceedings of: Noncommutative Geometry, Superstrings and Particle Physics Workshop, UnivRabat, Morocco