Eur. Phys. J. C 24, 613-618 (2002)
Muon anomalous magnetic moment from effective supersymmetryS. Baek1, P. Ko2 and Jae-hyeon Park2
1 School of Physics, KIAS, Seoul 130-012, Korea
2 Department of Physics, KAIST, Daejeon 305-701, Korea
(Received: 29 March 2002 / Published online: 14 June 2002 )
We present a detailed analysis on the possible maximal value of the muon within the context of effective SUSY models with R parity conservation. First of all, mixing among the second and the third family sleptons can contribute at one loop level to and simultaneously. One finds that can be as large as (10- for any , imposing an upper limit on the branching ratio. Furthermore, the two loop Barr-Zee type contributions to may be significant for large , if a stop is light and and At are large enough ( TeV). In this case, it is possible to have up to without conflicting with . We conclude that the possible maximal value for is about for any . Therefore the BNL experiment on the muon can exclude the effective SUSY models only if the measured deviation is larger than .
© Società Italiana di Fisica, Springer-Verlag 2002