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Muon anomalous magnetic moment from effective supersymmetry | | S. Baek
; P. Ko
; J. H. Park
; | | Date: |
27 Mar 2002 | | Journal: | Eur.Phys.J. C24 (2002) 613-618 | | Subject: | hep-ph | | Affiliation: | Korea Inst. for Adv. Study, Korea Adv. Inst. of Sci. and Tech. | | Abstract: | We present a detailed analysis on the possible maximal value of the muon (g-2) (= 2 a_mu) 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 a_mu(SUSY) and tau -> mu gamma simultaneously. One finds that the a_mu(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 a_mu(SUSY) can be significant for large tan beta, if a stop is light and mu and A_t are large enough (O(1) TeV). In this case, it is possible to have a_mu(SUSY) upto O(10)*10^-10 without conflicting with tau -> l gamma. We conclude that the possible maximal value for a_mu(SUSY) is about 20*10^-10 for any tan beta. Therefore the BNL experiment on the muon a_mu can exclude the effective SUSY models only if the measured deviation is larger than sim 30*10^-10. | | Source: | arXiv, hep-ph/0203251 | | Services: | Forum | Review | PDF | Favorites | |
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