In this section
Several of our current PhD candidates and fellow researchers at the Data Science Institute have published, or in the proccess of publishing, papers to present their research.
@article{Strege:2014:10.1007/JHEP09(2014)081,
author = {Strege, C and Bertone, G and Besjes, GJ and Caron, S and Ruiz, de Austri R and Strubig, A and Trotta, R},
doi = {10.1007/JHEP09(2014)081},
journal = {Journal of High Energy Physics},
title = {Profile likelihood maps of a 15-dimensional MSSM},
url = {http://dx.doi.org/10.1007/JHEP09(2014)081},
volume = {2014},
year = {2014}
}
TY - JOUR
AB - We present statistically convergent profile likelihood maps obtained via globalfits of a phenomenological Minimal Supersymmetric Standard Model with 15 free parameters(the MSSM-15), based on over 250M points. We derive constraints on the modelparameters from direct detection limits on dark matter, the Planck relic density measurementand data from accelerator searches. We provide a detailed analysis of the richphenomenology of this model, and determine the SUSY mass spectrum and dark matterproperties that are preferred by current experimental constraints. We evaluate the impactof 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 componentof the dark matter. The MSSM-15 parameters are relatively weakly constrained bycurrent data sets, with the exception of the parameters related to dark matter phenomenology(M1, M2, µ), which are restricted to the sub-TeV regime, mainly due to the relic densityconstraint. The mass of the lightest neutralino is found to be < 1.5 TeV at 99% C.L., butcan extend up to 3 TeV when excluding the g − 2 constraint from the analysis. Low-massbino-like neutralinos are strongly favoured, with spin-independent scattering cross-sectionsextending to very small values, ∼ 10−20 pb. ATLAS SUSY null searches strongly impacton this mass range, and thus rule out a region of parameter space that is outside the reachof any current or future direct detection experiment. The best-fit point obtained after inclusionof all data corresponds to a squark mass of 2.3 TeV, a gluino mass of 2.1 TeV and a130 GeV neutralino with a spin-independent cross-section of 2.4×10−10 pb, which is withinthe reach of future multi-ton scale direct detection experiments and of the upcoming LHCrun at increased centre-of-mass energy.
AU - Strege,C
AU - Bertone,G
AU - Besjes,GJ
AU - Caron,S
AU - Ruiz,de Austri R
AU - Strubig,A
AU - Trotta,R
DO - 10.1007/JHEP09(2014)081
PY - 2014///
SN - 1126-6708
TI - Profile likelihood maps of a 15-dimensional MSSM
T2 - Journal of High Energy Physics
UR - http://dx.doi.org/10.1007/JHEP09(2014)081
UR - http://hdl.handle.net/10044/1/28631
VL - 2014
ER -
Data Science Institute
William Penney Laboratory
Imperial College London
South Kensington Campus
London SW7 2AZ
United Kingdom
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