Muon anomalous magnetic moment from effective supersymmetry
Abstract
We present a detailed analysis on the possible maximal value of the muon (g-2) (= 2 amu) within the context of effective SUSY models with R parity conservation. First of all, the mixing among the second and the third family sleptons can contribute at one loop level to the amu(SUSY) and tau -> mu gamma simultaneously. One finds that the amu(SUSY) can be as large as (10-20)*10-10 for any tan beta, imposing the upper limit on the tau -> mu gamma branching ratio. Furthermore, the two-loop Barr-Zee type contributions to amu(SUSY) can be significant for large tan beta, if a stop is light and mu and At are large enough (O(1) TeV). In this case, it is possible to have amu(SUSY) upto O(10)*10-10 without conflicting with tau -> l gamma. We conclude that the possible maximal value for amu(SUSY) is about 20*10-10 for any tan beta. Therefore the BNL experiment on the muon amu can exclude the effective SUSY models only if the measured deviation is larger than 30*10-10.
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.