Family Gauge Symmetry and Koide's Mass Formula
Abstract
Koide's mass formula is an empirical relation among the charged lepton masses which holds with a striking precision. We propose a mechanism for cancelling the QED correction to Koide's formula. This is discussed in an effective theory with U(3) family gauge symmetry and a scenario in which this symmetry is unified with SU(2)L symmetry at 102-103 TeV scale.
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