Fourth Generation Leptons and Muon $g-2$

Hou, George Wei-Shu; Lee, Fei-Fan; Ma, Chien-Yi

Fourth Generation Leptons and Muon $g-2$

Authors

Hou, George Wei-Shu

Lee, Fei-Fan

Ma, Chien-Yi

Description

We consider the contributions to $g_μ-2$ from fourth generation neutral and charged leptons, $N$ and $E$, at the one-loop level. Diagramatically, 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 PMNS matrix element $V_{Nμ}$, from the Standard Model to the Two-Higgs Doublet Models. With contribution from $E$, we consider flavor changing neutral couplings.
Poster write-up at ICHEP08, Philadelphia, USA, July 2008. 3 pages, LaTeX, 1 eps figure