Texture of Yukawa coupling matrices in general two-Higgs-doublet model
| dc.creator | Zhou, Yu-Feng | |
| dc.date | 2003-07-18 | |
| dc.date.accessioned | 2026-07-07T10:48:49Z | |
| dc.date.available | 2026-07-07T10:48:49Z | |
| dc.description | We discuss possible parallel textures of the Yukawa coupling matrices in the generaltwo-Higgs-doublet model (2HDM). In those textures the flavor changing neutral currentsare naturally suppressed. Motivated by a phenomenologically successful texturewith four texture zeros in the standard model, we propose a predictive ansatz for the Yukawa coupling matrices with the same texture in the general 2HDM. Compared with the six texture-zero based ansatz proposed by Cheng and Sher, it is in a better agreement with the data of quark mixings and CP violation. The four texture-zero based ansatz predicts a different hierarchy in the Yukawa coupling matrix elements. As a consequence, in the lepton sector, the related Yukawa couplings are less constrained by the experimental upper bound of $μ\to eγ$, which allows significantly larger predictions for other processes. The contributions from neutral scalar interactions to the lepton number violation decay modes $\ell\to \ell_{1}\ell_{2}\ell_{3}$ are calculated in both ansatz. It is shown that the predictions from the four texture-zero based ansatz could be two order of magnitude greater than that from the six texture-zero based one. The branching ratio of $μ\to 3e$ and $τ\to 3μ$ can reach $7.5 \times 10^{-17}$ and $1.3\tiems 10^{-10}$ respectively. The predicted ratio of $Br(μ\to 3e)/Br(τ\to 3e)$ is also larger and almost parameter independent. Those differences make the two ansatz to be easily distinguished by the future experiments. | |
| dc.description | 12 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0307240 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0307240 | |
| dc.identifier | J.Phys.G30:783-792,2004 | |
| dc.identifier | doi:10.1088/0954-3899/30/6/008 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/184011 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Texture of Yukawa coupling matrices in general two-Higgs-doublet model | |
| dc.type | text |