IV.D344 — sigma-Equivariant Lepton Mass Matrix

The sigma-equivariant lepton mass matrix M_l = [[a,b,0],[b,c,b],[0,b,a]] with eigenvalues (m_e, m_mu, m_tau). Entries: a = iota^-4.96 ~ m_mu/m_e, b = iota^-5.92 ~ sqrt(m_mu*m_tau)/sqrt(2), c = iota^-7.53 ~ m_tau/m_e - m_mu/m_e + m_e. Sigma-equivariance (rows 1 and 3 are reflections) is forced by the chi_+/crossing/chi_- decomposition of L = S^1 v S^1.