1994/05/31 by S. Ferrara, Sergio Ferrara, Costas Kounnas +3
Physics and Astronomy · #Black Holes and Theoretical Physics #Dilaton #Gaugino #Gravitino #Hierarchy #Moduli #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #String (physics) #String theory #Supergravity #Supersymmetry #hep-ph #hep-th
paper · pdf · doi:10.1016/0550-3213(94)90154-6
published as Nucl.Phys.B429:589-625,1994; ERRATUM-ibid.B433:255,1995 · 40 pages, no figures, CERN-TH.7192/94, LPTENS -94/12, UCLA/94/TEP13 (plain LATEX, to be run twice). Some trivial misprints and references have been corrected
arxiv created 1994/06/08 · openalex publication_date 1994/11/01 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We study some conditions for the hierarchy m3/2 << MP to occur naturally in a generic effective supergravity theory. Absence of fine-tuning and perturbative calculability require that the effective potential has a sliding gravitino mass and vanishing cosmological constant, up to \cal O(m3/24) corrections. In particular, cancellation of quadratically divergent contributions to the one-loop effective potential should take place, including the `hidden sector' of the theory. We show that these conditions can be met in the effective supergravities derived from four-dimensional superstrings, with supersymmetry broken either at the string tree level via compactification, or by non-perturbative effects such as gaugino condensation. A crucial role is played by some approximate scaling symmetries, which are remnants of discrete target-space dualities in the large moduli limit. We derive explicit formulae for the soft breaking terms arising from this class of `large hierarchy compatible' (LHC) supergravities.