S. Dimopoulos et al., DISORIENTED AND PLASTIC SOFT TERMS - A DYNAMICAL SOLUTION TO THE PROBLEM OF SUPERSYMMETRIC FLAVOR VIOLATIONS, Nuclear physics. B, 454(1-2), 1995, pp. 59-74
We postulate that the orientation of the soft supersymmetry-breaking t
erms in flavor space is not fixed by tree level physics at the Planck
scale; it is a dynamical variable which depends on fields that have no
tree level potential. These fields can be thought of as either moduli
or as the Nambu-Goldstone bosons of the spontaneously broken flavor s
ymmetry which is non-linearly realized by the soft terms. We show that
the soft terms align with the quark and lepton Yukawa couplings, just
as spins align with an external magnetic field. As a result, the soft
terms conserve individual lepton numbers and do not cause large flavo
r or CP violations. The vacuum adjusts so as to allow large sparticle
splittings to naturally coexist with flavor conservation. Consequently
, the resulting phenomenology is different from that of minimal supers
ymmetric theories. We also propose theories in which the shape of the
soft terms in flavor space is a dynamical variable which depends on fi
elds that have no tree level potential. This dynamically leads to part
ial degeneracy among sparticles and further suppression of flavor viol
ations. The ideas of this paper suggest a connection between the space
of moduli and the spontaneously broken flavor group.