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arXiv:1805.09533 (hep-ph)
Charged Lepton Mass Relations in a SUSY Scenario
Yoshio Koide and Toshifumi Yamashita
The observed charged lepton masses satisfy the relations $K \equiv (m_e
+m_\mu+m_\tau)/(\sqrt{m_e} +\sqrt{m_\mu} +\sqrt{m_\tau})^2 =2/3$ and $\kappa
\equiv \sqrt{m_e m_\mu m_\tau}/(\sqrt{m_e} +\sqrt{m_\mu} +\sqrt{m_\tau})^3
=1/486$ with great accuracy. These parameters are given as $K=( {\rm Tr}[\Phi
\Phi])/ ({\rm Tr}[\Phi ])^2$ and $\kappa = {\rm det} \Phi/ ({\rm Tr}[\Phi ])^3$ if
the charged lepton masses $m_{ei}$ are given by $m_{ei} \propto \sum_k
\Phi_i^{\ k} \Phi_k^{\ i}$ where $\Phi$ is a U(3)-family nonet scalar. Simple
scalar potential forms to realize the relations have been already proposed in
non-supersymmetric scenarios, but the potential forms are not stable against
the renormalization group effects. In this paper, we examine supersymmetric
scenarios to make the parameters $K$ and $\kappa$ stable against the effects,
and show possible simple superpotential forms for the relations.
arXiv:1701.01921 (hep-ph)
Parameter-Independent Quark Mass Relation in the U(3)$\times$U(3)$'$
Model
Yoshio Koide and Hiroyuki Nishiura
Recently, we have proposed a quark mass matrix model based on
U(3)$\times$U(3)$'$ family symmetry, in which up- and down-quark mass matrices
$M_u$ and $M_d$ are described only by complex parameters $a_u $ and $a_d $,
respectively. When we use charged lepton masses as additional input values, we
can successfully obtain predictions for quark masses and
Cabibbo-Kobayashi-Maskawa mixing. Since we have only one complex parameter
$a_q$ for each mass matrix $M_q$, we can obtain a parameter-independent mass
relation by using three equations for ${\rm Tr}[H_q]$, ${\rm Tr}[H_q H_q]$ and
${\rm det}H_q$, where $H_q \equiv M_q M_q^\dagger$ ($q=u, d$). In this paper,
we investigate its parameter-independent feature of the quark mass relation in
the model.
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