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Exceptional supersymmetric standard model

Exceptional supersymmetric standard model
Exceptional supersymmetric standard model
We discuss some phenomenological aspects of an E6 inspired supersymmetric standard model with an extra U(1)N gauge symmetry under which right-handed neutrinos have zero charge, allowing a conventional see-saw mechanism. The ? problem is solved in a similar way to the NMSSM, but without the accompanying problems of singlet tadpoles or domain walls. The above exceptional supersymmetric standard model (ESSM) involves the low energy matter content of three 27 representations of E6, which is broken at the GUT scale, and allows gauge coupling unification due to an additional pair of Higgs-like doublets. The ESSM predicts a Z' boson and exotic quarks which, if light enough, will provide spectacular new physics signals at the LHC. We study the LHC phenomenology of the Z' and extra quarks, including their production and decay signatures particular to the ESSM. We also discuss the two-loop upper bound on the mass of the lightest CP-even Higgs boson, and show that it can be significantly heavier than in either the MSSM or the NMSSM.
supersymmetry, higgs bosons, upper bound, quark production, quarks, z bosons, grand unified theory, domain walls, singlet, neutrinos, gauge symmetry, standard model, supersymmetric field theory
0370-2693
278-284
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Nevzorov, R.
29e55377-613c-4b07-b29a-49fedd1f7544
King, S.F.
f8c616b7-0336-4046-a943-700af83a1538
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Nevzorov, R.
29e55377-613c-4b07-b29a-49fedd1f7544

King, S.F., Moretti, S. and Nevzorov, R. (2006) Exceptional supersymmetric standard model. Physics Letters B, 634 (2-3), 278-284. (doi:10.1016/j.physletb.2005.12.070).

Record type: Article

Abstract

We discuss some phenomenological aspects of an E6 inspired supersymmetric standard model with an extra U(1)N gauge symmetry under which right-handed neutrinos have zero charge, allowing a conventional see-saw mechanism. The ? problem is solved in a similar way to the NMSSM, but without the accompanying problems of singlet tadpoles or domain walls. The above exceptional supersymmetric standard model (ESSM) involves the low energy matter content of three 27 representations of E6, which is broken at the GUT scale, and allows gauge coupling unification due to an additional pair of Higgs-like doublets. The ESSM predicts a Z' boson and exotic quarks which, if light enough, will provide spectacular new physics signals at the LHC. We study the LHC phenomenology of the Z' and extra quarks, including their production and decay signatures particular to the ESSM. We also discuss the two-loop upper bound on the mass of the lightest CP-even Higgs boson, and show that it can be significantly heavier than in either the MSSM or the NMSSM.

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More information

Published date: 9 March 2006
Keywords: supersymmetry, higgs bosons, upper bound, quark production, quarks, z bosons, grand unified theory, domain walls, singlet, neutrinos, gauge symmetry, standard model, supersymmetric field theory

Identifiers

Local EPrints ID: 57379
URI: http://eprints.soton.ac.uk/id/eprint/57379
ISSN: 0370-2693
PURE UUID: 7fb90232-10e2-4012-a924-5ed43666b799

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Date deposited: 14 Aug 2008
Last modified: 13 Mar 2019 20:34

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Contributors

Author: S.F. King
Author: S. Moretti
Author: R. Nevzorov

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