Likelihood Analysis of the Sub-GUT MSSM in Light of LHC 13-TeV Data

Costa, J. C.; Sakurai, K.; Lucio, M.; Flächer, H.; Olive, K. A.; Ellis, J. R.; Buchmueller, O.; Borsato, M.; Dolan, M. J.; Richards, A.; Weiglein, G.; De Roeck, A.; Bagnaschi, Emanuele; Citron, M.; Heinemeyer, S.; Santos, D. Martínez

Preprint/Report

PUBDB-2017-11876

Likelihood Analysis of the Sub-GUT MSSM in Light of LHC 13-TeV Data

Costa, J. C. ; Bagnaschi, E. (Corresponding author)DESY* ; Sakurai, K.DESY* ; Borsato, M. ; Buchmueller, O. ; Citron, M. ; De Roeck, A. ; Dolan, M. J. ; Ellis, J. R. ; Flächer, H. ; Heinemeyer, S. ; Lucio, M. ; Santos, D. M. ; Olive, K. A. ; Richards, A. ; Weiglein, G.DESY*

2017

[10.3204/PUBDB-2017-11876]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2017-11876

Report No.: --IFT-UAM-CSIC-17-089; CERN-PH-TH-2017-197; DESY-17-156; FTPI-MINN-17-19; KCL-PH-TH-2017-45; UMN-TH-3703-17; arXiv:1711.00458

Abstract: We describe a likelihood analysis using MasterCode of variants of the MSSM in which the soft supersymmetry-breaking parameters are assumed to have universal values at some scale $M_{in}$ below the supersymmetric grand unification scale $M_{GUT}$, as can occur in mirage mediation and other models. In addition to $M_{in}$, such `sub-GUT' models have the 4 parameters of the CMSSM, namely a common gaugino mass $m_{1/2}$, a common soft supersymmetry-breaking scalar mass $m_0$, a common trilinear mixing parameter $A$ and the ratio of MSSM Higgs vevs $\tan\beta$, assuming that the Higgs mixing parameter $\mu > 0$. We take into account constraints on strongly- and electroweakly-interacting sparticles from $\sim 36$/fb of LHC data at 13 TeV and the LUX and 2017 PICO, XENON1T and PandaX-II searches for dark matter scattering, in addition to the previous LHC and dark matter constraints as well as full sets of flavour and electroweak constraints. We find a preference for $M_{in} \sim 10^5$ to $10^9$ GeV, with $M_{in} \sim M_{GUT}$ disfavoured by $\Delta \chi^2 \sim 3$ due to the ${\rm BR}(B_{s, d} \to \mu^+\mu^-)$ constraint. The lower limits on strongly-interacting sparticles are largely determined by LHC searches, and similar to those in the CMSSM. We find a preference for the LSP to be a Bino or Higgsino with $\tilde{\chi^0_1} \sim 1$ TeV, with annihilation via heavy Higgs bosons $H/A$ and stop coannihilation, or chargino coannihilation, bringing the cold dark matter density into the cosmological range. We find that spin-independent dark matter scattering is likely to be within reach of the planned LUX-Zeplin and XENONnT experiments. We probe the impact of the $(g-2)_\mu$ constraint, finding similar results whether or not it is included.

Keyword(s): dark matter: scattering ; supersymmetry: symmetry breaking ; scale: grand unified theory ; dark matter: density ; Higgs particle: heavy ; mediation: mirage ; gaugino: mass ; mass: scalar ; CERN LHC Coll ; minimal supersymmetric standard model ; sparticle ; mixing ; electroweak interaction ; magnetic moment ; annihilation ; Higgsino ; chargino ; flavor ; bino ; LUX ; LSP