Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/1938
Title: Minimal U(1)' extension of the minimal supersymmetric standard model
Authors: Demir, Durmuş Ali
Kane, Gordon L.
Wang, Ting T.
Keywords: Minimal supersymmetric standard model
Dark matter
μ parameter
Soft masses
Issue Date: Jul-2005
Publisher: American Physical Society
Source: Demir, D. A., Kane, G. L., and Wang, T.T. (2005). Minimal U(1)′ extension of the minimal supersymmetric standard model. Physical Review D - Particles, Fields, Gravitation and Cosmology, 72(1), 1-13. doi:10.1103/PhysRevD.72.015012
Abstract: Motivated by the apparent need for extending the minimal supersymmetric standard model (MSSM) and perhaps mitigating naturalness problems associated with the μ parameter and fine-tuning of the soft masses, we augment the MSSM spectrum by a SM gauge singlet chiral superfield, and enlarge the gauge structure by an additional U(1)′ invariance, so that the gauge and Higgs sectors are relatively secluded. One crucial aspect of U(1)′ models is the existence of anomalies, the cancellation of which may require the inclusion of exotic matter which in turn disrupts the unification of the gauge couplings. In this work we pursue the question of canceling the anomalies with a minimal matter spectrum and no exotics. This can indeed be realized provided that U(1)′ charges are family dependent and the soft-breaking sector includes nonholomorphic operators for generating the fermion masses. We provide the most general solutions for U(1)′ charges by taking into account all constraints from gauge invariance and anomaly cancellation. We analyze various laboratory and astrophysical bounds ranging from fermion masses to relic density, for an illustrative set of parameters. The U(1)′ charges admit patterns of values for which family nonuniversality resides solely in the lepton sector, though this does not generate leptonic flavor-changing neutral currents due to the U(1)′ gauge invariance.
URI: https://doi.org/10.1103/PhysRevD.72.015012
http://hdl.handle.net/11147/1938
ISSN: 1550-7998
1550-7998
1550-2368
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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