Likelihood analysis of supersymmetric SU(5) GUTs
AuthorBagnaschi, E; Costa, JC; Sakurai, K; Borsato, M; Buchmueller, O; Cavanaugh, R; Chobanova, V; Citron, M; De Roeck, A; Dolan, MJ; ...
Source TitleEuropean Physical Journal C: Particles and Fields
University of Melbourne Author/sDolan, Matthew
AffiliationSchool of Physics
Document TypeJournal Article
CitationsBagnaschi, E., Costa, J. C., Sakurai, K., Borsato, M., Buchmueller, O., Cavanaugh, R., Chobanova, V., Citron, M., De Roeck, A., Dolan, M. J., Ellis, J. R., Flacher, H., Heinemeyer, S., Isidori, G., Lucio, M., Martinez Santos, D., Olive, K. A., Richards, A., de Vries, K. J. & Weiglein, G. (2017). Likelihood analysis of supersymmetric SU(5) GUTs. EUROPEAN PHYSICAL JOURNAL C, 77 (2), https://doi.org/10.1140/epjc/s10052-017-4639-6.
Access StatusOpen Access
We perform a likelihood analysis of the constraints from accelerator experiments and astrophysical observations on supersymmetric (SUSY) models with SU(5) boundary conditions on soft SUSY-breaking parameters at the GUT scale. The parameter space of the models studied has seven parameters: a universal gaugino mass [Formula: see text], distinct masses for the scalar partners of matter fermions in five- and ten-dimensional representations of SU(5), [Formula: see text] and [Formula: see text], and for the [Formula: see text] and [Formula: see text] Higgs representations [Formula: see text] and [Formula: see text], a universal trilinear soft SUSY-breaking parameter [Formula: see text], and the ratio of Higgs vevs [Formula: see text]. In addition to previous constraints from direct sparticle searches, low-energy and flavour observables, we incorporate constraints based on preliminary results from 13 TeV LHC searches for jets + [Formula: see text] events and long-lived particles, as well as the latest PandaX-II and LUX searches for direct Dark Matter detection. In addition to previously identified mechanisms for bringing the supersymmetric relic density into the range allowed by cosmology, we identify a novel [Formula: see text] coannihilation mechanism that appears in the supersymmetric SU(5) GUT model and discuss the role of [Formula: see text] coannihilation. We find complementarity between the prospects for direct Dark Matter detection and SUSY searches at the LHC.
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