Flavour non-conservation in goldstino interactions

Abstract

We point out that the interactions of goldstinos with matter supermultiplets are a potential source of flavour violation, if fermion and sfermion mass matrices are not aligned and supersymmetry is spontaneously broken at a low scale. We study the impact of those couplings on low-energy processes such as μ\to e γ, μ\to eee, K \to μ^+ μ^-, K-\ov{K} transitions and analogous ones. Moreover, we address the issue of flavour violation in low-energy processes involving two goldstinos and two matter fermions, generalizing earlier results obtained in the flavour-conserving case.

22 LaTeX pages, 2 ps figures, uses epsfig and axodraw; typos corrected, to appear in Nucl. Phys. B

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• New Limit for the Family-Number Non-conserving Decay mu+ to e+_gamma
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• Update of the Search for the Neutrinoless Decay $\tau \to \mu \gamma$
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• Supersymmetric Seesaw without Singlet Neutrinos: Neutrino Masses and Lepton-Flavour Violation
• Phenomenology of a leptonic goldstino and invisible Higgs boson decays
• Kaon Physics with Light Sgoldstinos and Parity Conservation
• Sgoldstino events in top decays at LHC
• Sgoldstino-Higgs mixing in models with low-scale supersymmetry breaking
• Beyond the standard seesaw: neutrino masses from Kahler operators and broken supersymmetry
• Lepton flavor-violating decays of the Higgs boson from sgoldstino mixing
• Gravitational waves from first-order electroweak phase transition in a model with light sgoldstinos
• CP violation in models with TeV-scale SUSY breaking