科研之友
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摘要
We consider the contributions to g(mu)-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 mu -> e gamma. We assess how the existence of a fourth generation would affect these new physics models.
- 出版日期2009-4
