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750 GeV diphoton resonance from singlets in an exceptional supersymmetric standard model

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
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), 1-28, [139]. (doi:10.1007/JHEP03(2016)139).

Record type: Article

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

Identifiers

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: 26 Mar 2020 17:35

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