Fourth generation leptons and muon g-2
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology
Journal Volume
79
Journal Issue
7
Date Issued
2009
Author(s)
Abstract
We consider the contributions to gμ-2 from fourth generation heavy neutral and charged leptons N and E, respectively, at the one-loop level. Diagrammatically, there are two types of contributions: boson-boson-N and E-E-boson in the loop diagram. In general, the effect from N is suppressed by off-diagonal lepton mixing matrix elements. For E, we consider flavor changing neutral couplings arising from various new physics models, which are stringently constrained by μ→eγ. We assess how the existence of a fourth generation would affect these new physics models. © 2009 The American Physical Society.
Type
journal article