# Family gauge symmetry as an origin of Koide's mass formula and charged lepton spectrum

@article{Sumino2009FamilyGS, title={Family gauge symmetry as an origin of Koide's mass formula and charged lepton spectrum}, author={Yukinari Sumino}, journal={Journal of High Energy Physics}, year={2009}, volume={2009}, pages={075-075} }

Koide's mass formula is an empirical relation among the charged lepton masses which holds with a striking precision. We present a model of charged lepton sector within an effective field theory with U(3) × SU(2) family gauge symmetry, which predicts Koide's formula within the present experimental accuracy. Radiative corrections as well as other corrections to Koide's mass formula have been taken into account. We adopt a known mechanism, through which the charged lepton spectrum is determined by…

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