## Abstract

In the simplest examples of models with a discrete quark-lepton symmetry, an electroweak symmetry braking sector with more than one Higgs doublet is necessary to obtain the correct mass relations between quarks and leptons. A two Higgs doublet model version has flavour-nonconserving Yukawa couplings, which are proportional to the masses of the quark-lepton symmetric partners of the fermions. The main focus of this paper will be on flavour-changing leptonic decays, in particular those of muons since these give the most opportunity for experimental investigation. The neutral Higgs mediated decay {mu}{sup -} {yields} e{sup -} e{sup +}e{sup -} will be investigated at tree-level, as will the charged-Higgs contribution to the decay {mu} {sup -} {yields} {upsilon} {sub {mu}} e{sup -}{upsilon} {sup -}bar {sub e}. A one-loop calculation of the process {mu} {yields} e {gamma} will be performed. This will lead on to an examination of the effect on the muon anomalous magnetic moment. Finally, the effect of the quark-lepton symmetric 2HDM contribution to b {yields} s {gamma} will briefly be considered. 10 refs., 2 figs.

## Citation Formats

Lassig, C C, and Volkas, R R.
Phenomenology of the two Higgs doublet sector of a quark-lepton symmetric model.
Australia: N. p.,
1994.
Web.

Lassig, C C, & Volkas, R R.
Phenomenology of the two Higgs doublet sector of a quark-lepton symmetric model.
Australia.

Lassig, C C, and Volkas, R R.
1994.
"Phenomenology of the two Higgs doublet sector of a quark-lepton symmetric model."
Australia.

@misc{etde_10113760,

title = {Phenomenology of the two Higgs doublet sector of a quark-lepton symmetric model}

author = {Lassig, C C, and Volkas, R R}

abstractNote = {In the simplest examples of models with a discrete quark-lepton symmetry, an electroweak symmetry braking sector with more than one Higgs doublet is necessary to obtain the correct mass relations between quarks and leptons. A two Higgs doublet model version has flavour-nonconserving Yukawa couplings, which are proportional to the masses of the quark-lepton symmetric partners of the fermions. The main focus of this paper will be on flavour-changing leptonic decays, in particular those of muons since these give the most opportunity for experimental investigation. The neutral Higgs mediated decay {mu}{sup -} {yields} e{sup -} e{sup +}e{sup -} will be investigated at tree-level, as will the charged-Higgs contribution to the decay {mu} {sup -} {yields} {upsilon} {sub {mu}} e{sup -}{upsilon} {sup -}bar {sub e}. A one-loop calculation of the process {mu} {yields} e {gamma} will be performed. This will lead on to an examination of the effect on the muon anomalous magnetic moment. Finally, the effect of the quark-lepton symmetric 2HDM contribution to b {yields} s {gamma} will briefly be considered. 10 refs., 2 figs.}

place = {Australia}

year = {1994}

month = {Mar}

}

title = {Phenomenology of the two Higgs doublet sector of a quark-lepton symmetric model}

author = {Lassig, C C, and Volkas, R R}

abstractNote = {In the simplest examples of models with a discrete quark-lepton symmetry, an electroweak symmetry braking sector with more than one Higgs doublet is necessary to obtain the correct mass relations between quarks and leptons. A two Higgs doublet model version has flavour-nonconserving Yukawa couplings, which are proportional to the masses of the quark-lepton symmetric partners of the fermions. The main focus of this paper will be on flavour-changing leptonic decays, in particular those of muons since these give the most opportunity for experimental investigation. The neutral Higgs mediated decay {mu}{sup -} {yields} e{sup -} e{sup +}e{sup -} will be investigated at tree-level, as will the charged-Higgs contribution to the decay {mu} {sup -} {yields} {upsilon} {sub {mu}} e{sup -}{upsilon} {sup -}bar {sub e}. A one-loop calculation of the process {mu} {yields} e {gamma} will be performed. This will lead on to an examination of the effect on the muon anomalous magnetic moment. Finally, the effect of the quark-lepton symmetric 2HDM contribution to b {yields} s {gamma} will briefly be considered. 10 refs., 2 figs.}

place = {Australia}

year = {1994}

month = {Mar}

}