title: Geometrical hierarchies in classical supergravity.
abstract: We introduce a N=1 supergravity model with a very simple hidden sector coupled to the electroweak gauge and Higgs sectors of the minimal supersymmetric standard model. At the classical level, supersymmetry and SU(2)×U(1) are both spontaneously broken, with vanishing vacuum energy. Two real flat directions control the two symmetry-breaking scales m(3/2) and m(Z). The two massless scalars are a gauge singlet and the standard Higgs boson. All other unobserved particles have masses of order m(3/2). This may be a new starting point for studying the compatibility of naturalness with the observed mass hierarchies.
authors: Dipartimento di Fisica ed Astronomia, Università di Padova, Via Marzolo 8, 35131 Padova, Italy and INFN, Sezione di Padova, Via Marzolo 8, 35131 Padova, Italy and SISSA, Via Bonomea 265, 34136 Trieste, Italy.
authors: Hui
authors: H
authors: Luo
authors: Dipartimento di Fisica ed Astronomia, Università di Padova, Via Marzolo 8, 35131 Padova, Italy and INFN, Sezione di Padova, Via Marzolo 8, 35131 Padova, Italy.
authors: Fabio
authors: F
authors: Zwirner