Flavor changing neutral current processes and the muon anomalous magnetic moment in the supergravity model

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dc.creatorGoto, Toru.
dc.creatorOkada, Yasuhiro
dc.creatorShimizu, Yasuhiro
dc.date1999-08-30
dc.date.accessioned2026-07-07T04:07:55Z
dc.date.available2026-07-07T04:07:55Z
dc.descriptionFlavor changing neutral current processes in B and K decays in the supergravity model are revisited taking into account the recent progress of Higgs boson search experiments at LEP. Possible deviations of B^0--$\bar{B}^0$ mixing, the CP violating K^0--$\bar{K}^0$ mixing parameter $ε_K$ from the standard model predictions are reduced significantly in a small $\tanβ$ region due to the constraints on the SUSY parameter space imposed by the Higgs boson search. With the present bound on the Higgs boson mass, the magnitude of the B^0--$\bar{B}^0$ mixing amplitude can be enhanced up to 12% for $\tanb=3$ in the minimal supergravity. If we relax the strict universality of SUSY breaking scalar masses at the GUT scale, the deviation can be 25%. We also investigate SUSY contributions to the muon anomalous magnetic moment in the supergravity model and show that there is a correlation with the $b \to s γ$ amplitude. The SUSY contribution to $a_μ= \frac{(g-2)_μ}{2}$ can be (-30 -- $+80)\times 10^{-10}$ for $\tanβ=10$ and even larger for larger $\tanβ$. The improved measurement of the muon anomalous magnetic moment in the on-going experiment at BNL will put a strong constraint on SUSY parameter space, especially for a large $\tanβ$ region.
dc.descriptionLaTeX-2e, 42 pages, 23 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/9908499
dc.identifierhttp://arxiv.org/abs/hep-ph/9908499
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/49334
dc.subjectHigh Energy Physics - Phenomenology
dc.titleFlavor changing neutral current processes and the muon anomalous magnetic moment in the supergravity model
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