Non-universal gaugino mass GUT models in the light of dark matter and LHC constraints

We present statistically convergent profile likelihood maps obtained via global fits of a phenomenological Minimal Supersymmetric Standard Model with 15 free parameters (the MSSM-15), based on over 250M points. We derive constraints on the model parameters from direct detection limits on dark matter, the Planck relic density measurement and data from accelerator searches. We provide a detailed analysis of the rich phenomenology of this model, and determine the SUSY mass spectrum and dark matter properties that are preferred by current experimental constraints. We evaluate the impact of the measurement of the anomalous magnetic moment of the muon (g − 2) on our results, and provide an analysis of scenarios in which the lightest neutralino is a subdominant component of the dark matter. The MSSM-15 parameters are relatively weakly constrained by current data sets, with the exception of the parameters related to dark matter phenomenology (M 1 , M 2 , µ), which are restricted to the sub-TeV regime, mainly due to the relic density constraint. The mass of the lightest neutralino is found to be < 1.5 TeV at 99% C.L., but can extend up to 3 TeV when excluding the g − 2 constraint from the analysis. Low-mass bino-like neutralinos are strongly favoured, with spin-independent scattering cross-sections extending to very small values, ∼ 10 −20 pb. ATLAS SUSY null searches strongly impact on this mass range, and thus rule out a region of parameter space that is outside the reach of any current or future direct detection experiment. The best-fit point obtained after inclusion of all data corresponds to a squark mass of 2.3 TeV, a gluino mass of 2.1 TeV and a 130 GeV neutralino with a spin-independent cross-section of 2.4×10 −10 pb, which is within the reach of future multi-ton scale direct detection experiments and of the upcoming LHC run at increased centre-of-mass energy.

Section: Introductionmentioning

confidence: 81%

Profile likelihood maps of a 15-dimensional MSSM

Strege

Bertone

Besjes

et al. 2014

“…We note that recently there have been several attempts to resolve the discrepancy within the MSSM framework assuming non-universal SSB mass terms at M GUT for gauginos [41][42][43] or sfermions [38,44].…”

Section: Jhep05(2014)079mentioning

confidence: 97%

Split sfermion families, Yukawa unification and muon g − 2

Ajaib

Gogoladze

Shafi

et al. 2014

We consider two distinct classes of Yukawa unified supersymmetric SO(10) models with non-universal and universal soft supersymmetry breaking (SSB) gaugino masses at M GUT . In both cases, we assume that the third family SSB sfermion masses at M GUT are different from the corresponding sfermion masses of the first two families (which are equal). For the SO(10) model with essentially arbitrary (non-universal) gaugino masses at M GUT , it is shown that t-b-τ Yukawa coupling unification is compatible, among other things, with the 125 GeV Higgs boson mass, the WMAP relic dark matter density, and with the resolution of the apparent muon g − 2 anomaly. The colored sparticles in this case all turn out to be quite heavy, of order 5 TeV or more, but the sleptons (smuon and stau) can be very light, of order 200 GeV or so. For the SO(10) model with universal gaugino masses and NUHM2 boundary conditions, the muon g − 2 anomaly cannot be resolved. However, the gluino in this class of models is not too heavy, 3 TeV, and therefore may be found at the LHC.

“…Particularly with the announcement of Higgs boson discovery, and/or with the latest LHC data of squark and gluino masses, models having limited number of high scale physics inputs such as mSUGRA can hardly accommodate the above constraint [154,155]. However, non-universal SUGRA models can still accommodate the above non-vanishing ∆a µ apart from generic MSSM models with a larger set of inputs [156][157][158][159].…”

Section: Jhep07(2014)019mentioning

confidence: 99%

The electroweak sector of the pMSSM in the light of LHC - 8 TeV and other data

Chakraborti

Chattopadhyay

Choudhury

et al. 2014

106

Using the chargino-neutralino and slepton search results from the LHC in conjunction with the WMAP/PLANCK and (g − 2) µ data, we constrain several generic pMSSM models with decoupled strongly interacting sparticles, heavier Higgs bosons and characterized by different hierarchies among the EW sparticles. We find that some of them are already under pressure and this number increases if bounds from direct detection experiments like LUX are taken into account, keeping in mind the associated uncertainties. The XENON1T experiment is likely to scrutinize the remaining models closely. Analysing models with heavy squarks, a light gluino along with widely different EW sectors, we show that the limits on m g are not likely to be below 1.1 TeV, if a multichannel analysis of the LHC data is performed. Using this light gluino scenario we further illustrate that in future LHC experiments the models with different EW sectors can be distinguished from each other by the relative sizes of the n-leptons + m-jets + E / T signals for different choices of n.