Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-04-24
Phys.Rev. D64 (2001) 093012
Physics
High Energy Physics
High Energy Physics - Phenomenology
Final version to appear in Phys. Rev. D. Conventions clarified, results in the figures improved
Scientific paper
10.1103/PhysRevD.64.093012
We analyze the anomalous magnetic moment of the muon (a_{\mu}) in supersymmetric scenarios. First we concentrate on scenarios with universal soft terms. We find that a moderate increase of a_{\mu} can be obtained by lowering the unification scale M_{GUT} to intermediate values 10^{10-12} GeV. However, large values of \tan \beta are still favored. Then we study the case of non-universal soft terms. For the usual value M_{GUT}~10^{16} GeV, we obtain a_{\mu} in the favored experimental range even for moderate \tan \beta regions \tan\beta ~ 5$. Finally, we give an explicit example of these scenarios. In particular, we show that in a D-brane model, where the string scale is naturally of order 10^{10-12} GeV and the soft terms are non universal, a_{\mu} is enhanced with low \tan\beta.
Cerdeno David G.
Gabrielli Emidio
Khalil Shaaban
Munoz Carlos
Torrente-Lujan Emilio
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