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Zeitschrift für Physik C Particles and Fields
ISSN: 0170-9739 (printed version)
ISSN: 1431-5858 (electronic version)
Abstract Volume 73 Issue 1 (1996) pp 169-180
Nonlinear local supersymmetric SU (5)-model
Peter John, Bjong Ro Kim
III. Physikalisches Institut A, RWTH Aachen, Sommerfeldstrasse 26, D-52074 Aachen, Germany (e-mail: john@physik.rwth-aachen.de, kim@physik.rwth-aachen.de)
Received: 8 January 1996
Abstract. We construct a realistic nonlinear supersymmetric SU(5) model without superpartner particles in curved space and investigate the Higgs sector in the limit of flat space. We need at least an adjoint-, a quintuplet- and an antiquintuplet-Higgs multiplet. In order to obtain a realistic breakdown of SU(5) to SU(3)×U(1) at tree level we have to modify the vacuum structure of the adjoint representation in comparison to other SU(5)-models. This model requires an "elegant" fine-tuning. We determine the mass spectrum of the electroweak Higgs sector.
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