750 GeV diphoton resonance from singlets in an exceptional supersymmetric standard model
750 GeV diphoton resonance from singlets in an exceptional supersymmetric standard model
The 750-760 GeV diphoton resonance may be identified as one or two scalars and/or one or two pseudoscalars contained in the two singlet superfields S 1,2 arising from the three 27-dimensional representations of E 6. The three 27s also contain three copies of colour-triplet charge ?1/3 vector-like fermions D, D¯¯¯¯ and two copies of charged inert Higgsinos H~+ , H~? to which the singlets S 1,2 may couple. We propose a variant of the E6SSM where the third singlet S 3 breaks a gauged U(1) N above the TeV scale, predicting Z N? , D, D¯¯¯¯, H~+ , H~? at LHC Run 2, leaving the two lighter singlets S 1,2 with masses around 750 GeV. We calculate the branching ratios and cross-sections for the two scalar and two pseudoscalar states associated with the S 1,2 singlets, including possible degeneracies and maximal mixing, subject to the constraint that their couplings remain perturbative up to the unification scale.
supersymmetry phenomenology
1-28
King, Stephen
f8c616b7-0336-4046-a943-700af83a1538
Nevzorov, Roman
b67e86cd-abc5-4d17-9299-8e8eef2f3f61
21 March 2016
King, Stephen
f8c616b7-0336-4046-a943-700af83a1538
Nevzorov, Roman
b67e86cd-abc5-4d17-9299-8e8eef2f3f61
King, Stephen and Nevzorov, Roman
(2016)
750 GeV diphoton resonance from singlets in an exceptional supersymmetric standard model.
Journal of High Energy Physics, 2016 (3), , [139].
(doi:10.1007/JHEP03(2016)139).
Abstract
The 750-760 GeV diphoton resonance may be identified as one or two scalars and/or one or two pseudoscalars contained in the two singlet superfields S 1,2 arising from the three 27-dimensional representations of E 6. The three 27s also contain three copies of colour-triplet charge ?1/3 vector-like fermions D, D¯¯¯¯ and two copies of charged inert Higgsinos H~+ , H~? to which the singlets S 1,2 may couple. We propose a variant of the E6SSM where the third singlet S 3 breaks a gauged U(1) N above the TeV scale, predicting Z N? , D, D¯¯¯¯, H~+ , H~? at LHC Run 2, leaving the two lighter singlets S 1,2 with masses around 750 GeV. We calculate the branching ratios and cross-sections for the two scalar and two pseudoscalar states associated with the S 1,2 singlets, including possible degeneracies and maximal mixing, subject to the constraint that their couplings remain perturbative up to the unification scale.
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Accepted/In Press date: 8 March 2016
e-pub ahead of print date: 21 March 2016
Published date: 21 March 2016
Keywords:
supersymmetry phenomenology
Organisations:
Theoretical Partical Physics Group
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Local EPrints ID: 397103
URI: http://eprints.soton.ac.uk/id/eprint/397103
PURE UUID: 0590a555-fc39-448c-9222-536cb2e4ef8f
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Date deposited: 24 Jun 2016 11:11
Last modified: 21 Aug 2025 09:22
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Author:
Roman Nevzorov
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