Renormalizable $A_4$ Model for Lepton Sector

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dc.creatorFrampton, Paul H.
dc.creatorMatsuzaki, Shinya
dc.date2008-06-27
dc.date2008-10-30
dc.date.accessioned2026-07-07T10:13:45Z
dc.date.available2026-07-07T10:13:45Z
dc.descriptionWe revisit $A_4$ flavor symmetry for the lepton sector with minimal Higgs sector, namely just one $A_4-$triplet SU(2)-doublet scalar. To increase predictivity even further, we impose the constraint of renormalizability. A geometric interpretation of an $A_4-$triplet aids our understanding of tribimaximal mixing. To increase predictivity even further, we impose the constraint of renormalizability. We investigate the neutrino mass hierarchy in such a minimal $A_4$ model and find there are two solutions: one with $m_2 \gg m_1 = m_3$ is phenomenologically unacceptable; the other with $m_3 \gg m_1 = m_2$ is a normal hierarchy. An inverted hierarchy is impossible without addition of more parameters by either more Higgs scalars or higher-order irrelevant operators.
dc.descriptionComparison to previous work
dc.identifierhttps://arxiv.org/abs/0806.4592
dc.identifierhttp://arxiv.org/abs/0806.4592
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172644
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleRenormalizable $A_4$ Model for Lepton Sector
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