FCNC in Generalized Supersymmetric Theories

We study the constraints imposed by flabour changing neutral current phenomena on supersymmetrizations of the standard model where a non-flat Kähler metric and/or new superfields are present. In particular, we consider SU(5), SO(10) and E 6 grand unified extensions. We find that the present experimental bounds on μ → e + γ , b → s + γ and the results concerning the K − K and B d − B d mixings severely constrain the choice of spontaneously broken N = 1 supergravity theories whose low energy limit yields the standard model.

SUPERSYMMETRY
NEUTRAL CURRENT: FLAVOR CHANGING
GRAND UNIFIED THEORY: SU(5)
GRAND UNIFIED THEORY: SO(10)
GRAND UNIFIED THEORY: E(6)
MUON: RADIATIVE DECAY
RADIATIVE DECAY: MUON
BOTTOM: RADIATIVE DECAY
K0 anti-K0: mixing
B0 anti-B0: mixing

References(40)

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