Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1994-10-12
Phys.Rev.D51:207-217,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
26 pages
Scientific paper
10.1103/PhysRevD.51.207
Constraints on the two Higgs doublet model are presented, assuming a top mass of 174 $\pm$ 17 GeV. We concentrate primarily on the ``type II'' model, where up--type quarks receive their mass from one Higgs doublet, and down--type quarks receive their mass from the second doublet. High energy constraints derived from the $W$ mass, the full width of the $Z$ and the $b \bar b$ partial width of the $Z$ are combined with low energy constraints from $\Gamma(b\to s \gamma)$, $\Gamma(b \to c \tau \bar\nu_\tau)$ and $B^0$-$\bar B^0$ mixing to determine the experimentally favored configurations of the model. This combination of observables rules out small charged Higgs masses and small values of $\tan\beta$, and provides some information about the neutral Higgs masses and the mixing angle $\alpha$. In particular, constraints derived from the $\rho$ parameter rule out configurations where the charged Higgs is much heavier or much lighter than the neutral Higgses. We discuss a scenario where $\Gamma(Z\to b \bar b)$ is enhanced relative to the standard model result, which unfortunately is on the verge of being ruled out by the combination of $\Gamma(b\to s \gamma)$ and $\rho$ parameter constraints. Implications for various extensions of the standard model are briefly discussed.
No associations
LandOfFree
The heavy top quark in the two Higgs doublet model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The heavy top quark in the two Higgs doublet model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The heavy top quark in the two Higgs doublet model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-534086