Gauge coupling unification in the exceptional supersymmetric standard model
Gauge coupling unification in the exceptional supersymmetric standard model
We consider the renormalisation group flow of gauge couplings within the so-called exceptional supersymmetric Standard Model (E6SSM) based on the low-energy matter content of 27-dimensional representations of the gauge group E6, together with two additional non-Higgs doublets. The two-loop beta functions are computed, and the threshold corrections are studied in the E6SSM. Our results show that gauge coupling unification in the E6SSM can be achieved for phenomenologically acceptable values of ?3(MZ), consistent with the central measured low-energy value, unlike in the minimal supersymmetric Standard Model (MSSM) which, ignoring the effects of high energy threshold corrections, requires significantly higher values of ?3(MZ), well above the experimentally measured central value.
57-64
King, S. F.
f8c616b7-0336-4046-a943-700af83a1538
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Nevzorov, R.
29e55377-613c-4b07-b29a-49fedd1f7544
21 June 2007
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.
(2007)
Gauge coupling unification in the exceptional supersymmetric standard model.
Physics Letters B, 650 (1), .
(doi:10.1016/j.physletb.2007.04.061).
Abstract
We consider the renormalisation group flow of gauge couplings within the so-called exceptional supersymmetric Standard Model (E6SSM) based on the low-energy matter content of 27-dimensional representations of the gauge group E6, together with two additional non-Higgs doublets. The two-loop beta functions are computed, and the threshold corrections are studied in the E6SSM. Our results show that gauge coupling unification in the E6SSM can be achieved for phenomenologically acceptable values of ?3(MZ), consistent with the central measured low-energy value, unlike in the minimal supersymmetric Standard Model (MSSM) which, ignoring the effects of high energy threshold corrections, requires significantly higher values of ?3(MZ), well above the experimentally measured central value.
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Submitted date: 2 February 2007
Published date: 21 June 2007
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Local EPrints ID: 57381
URI: http://eprints.soton.ac.uk/id/eprint/57381
ISSN: 0370-2693
PURE UUID: 96128b36-a71d-4924-9403-13b28bc18422
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Date deposited: 14 Aug 2008
Last modified: 16 Mar 2024 03:34
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Author:
R. Nevzorov
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