A.J. Davies

Higgs and top mass from an extremality condition

Abstract We reconsider the vacuum stability analysis of the standard model with three generations and one Higgs doublet. By assuming the validity of this model up to the Planck scale, we impose extremality conditions at the M W scale on the parameters of the Higgs potential. The conditions lead to the predictions m t ∼ M w and m H ∼ M z . This result implies that the top might be discovered soon, while the discovery of the Higgs seems to be relegated to the SSC.

Penguin effects induced by the two-Higgs-doublet model and charmlessB-meson decays

AbstractNonstandard physical effects through the penguin diagram induced by the charged Higgs scalar contribution in the two-Higgs-doublet model are analysed. Since non-leptonicB-decay processes to final states consisting ofs+s+

A one-loop renormalization group analysis of the Gelmini-Roncadelli model

\bar s

Penguin-Diagram Induced

are induced only through the penguin diagram they are important tests of such contributions. We compare these decays including the non-standard two-Higgs-doublet contribution with the standard model results, which arise from the magnetic gluon transistion term. The charged Higgs contribution can give a sizable enhancement to the branching fractions ofB-meson charmless decay.

B \rightarrow K_X\phi

We systematically analyse the gluonic penguin-induced charmless decays

Decays in the Standard Model and in the Two-Higgs-Doublet Model

B \ra K_X\phi

Quaternionic Dirac equation.

(

Naturalness of the invisible axion model

K_X