Fermion mass hierarchies and flavour mixing from a minimal discrete symmetry

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• 作者：Ferruccio Feruglio ; Yin Lin
• 关键词：Altered states of consciousness ; Dual klepsydra model ; Psilocybin ; Subjective duration ; Time experience ; Time reproduction
• 刊名：Nuclear Physics B
• 出版年：2008
• 期刊代码：45_05503213
• 类别：ph
• 出版时间：1 September 2008
• 卷：800
• 期：1-2
• 页码：77-93
• 文件大小：197 K

摘要

We construct a simple model of fermion masses based on a spontaneously broken S₃×Z₃ flavour group. At the leading order, in the neutrino sector S₃ is broken down to a ν_μ–ν_τ parity subgroup that enforces a maximal atmospheric mixing angle and a vanishing θ₁₃. In the charged lepton sector the ν_μ–ν_τ parity is maximally broken and the resulting mass matrix is nearly diagonal. The charged lepton mass hierarchy is automatically reproduced by the S₃ symmetry breaking parameter alone. A careful analysis shows that, after the inclusion of all relevant subleading effects, the model predicts and , λ_c denoting the Cabibbo angle. A simple extension to the quark sector is also illustrated, where the mass spectrum and the mixing angles are naturally reproduced, with the exception of the mixing angle between the first two generations, that requires a small accidental enhancement.