750 GeV diphoton resonance from singlets in an exceptional supersymmetric standard model
Abstract
The 750760 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 27dimensional representations of E _{6}. The three 27s also contain three copies of colourtriplet charge ∓1 /3 vectorlike fermions D, overline{D} and two copies of charged inert Higgsinos {tilde{H}}^{+} , {tilde{H}}^{} to which the singlets S _{1,2} may couple. We propose a variant of the E_{6}SSM where the third singlet S _{3} breaks a gauged U(1)_{ N } above the TeV scale, predicting Z _{ N } ^{'} , D, overline{D} , {tilde{H}}^{+} , {tilde{H}}^{} at LHC Run 2, leaving the two lighter singlets S _{1,2} with masses around 750 GeV. We calculate the branching ratios and crosssections 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.
 Publication:

Journal of High Energy Physics
 Pub Date:
 March 2016
 DOI:
 10.1007/JHEP03(2016)139
 arXiv:
 arXiv:1601.07242
 Bibcode:
 2016JHEP...03..139K
 Keywords:

 Supersymmetry Phenomenology;
 High Energy Physics  Phenomenology
 EPrint:
 22 pages, 4 figures, some minor changes to the text, references added