We show how the spontaneous breaking of local N = 1 supersymmetry and of the SU(2) × U(1) gauge symmetry can be simultaneously realized, with naturally vanishing tree-level vacuum energy, in superstring effective supergravities. Both the gravition mass m 3 2 and the electroweak scale mZ are classically undetermined, and slide along moduli directions that include the Higgs flat direction |H10| = |H20|. There are important differences with conventional supergravity goldstino has components along the higgsino direction; SU(2) × U(1) breaking occurs already at the classical level; the scales m 3 2 and mZ, the rauge couplings, the lightest Higgs mass and the cosmological constant are entirely determined by quantum corrections. © 1995.
Supersymmetry and SU(2) × U(1) breaking with naturally vanishing vacuum energy
ZWIRNER, FABIO
1995
Abstract
We show how the spontaneous breaking of local N = 1 supersymmetry and of the SU(2) × U(1) gauge symmetry can be simultaneously realized, with naturally vanishing tree-level vacuum energy, in superstring effective supergravities. Both the gravition mass m 3 2 and the electroweak scale mZ are classically undetermined, and slide along moduli directions that include the Higgs flat direction |H10| = |H20|. There are important differences with conventional supergravity goldstino has components along the higgsino direction; SU(2) × U(1) breaking occurs already at the classical level; the scales m 3 2 and mZ, the rauge couplings, the lightest Higgs mass and the cosmological constant are entirely determined by quantum corrections. © 1995.
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