Likelihood Functions for Supersymmetric Observables in Frequentist Analyses of the CMSSM and NUHM1

Buchmueller, O.; Cavanaugh, R.; De Roeck, A.; Ellis, J. R.; Flacher, H.; Heinemeyer, S.; Isidori, G.; Olive, K. A.; Ronga, F. J.; Weiglein, G.

doi:10.1140/epjc/s10052-009-1159-z

Title: Likelihood Functions for Supersymmetric Observables in Frequentist Analyses of the CMSSM and NUHM1

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Eur.Phys.J.C

DOI:https://doi.org/10.1140/epjc/s10052-009-1159-z· OSTI ID:1892265

Buchmueller, O. ^[1];

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^[8]; Ronga, F. J. ^[9]; Weiglein, G. ^[10]

Imperial Coll., London
Fermilab; Illinois U., Chicago
CERN; Antwerp U.
CERN
Rochester U.
Cantabria Inst. of Phys.
Frascati
Minnesota U., Theor. Phys. Inst.
Zurich, ETH
Durham U., IPPP

On the basis of frequentist analyses of experimental constraints from electroweak precision data, g-2, B physics and cosmological data, we investigate the parameters of the constrained MSSM (CMSSM) with universal soft supersymmetry-breaking mass parameters, and a model with common non-universal Higgs masses (NUHM1). We present chi^2 likelihood functions for the masses of supersymmetric particles and Higgs bosons, as well as b to s gamma, b to mu mu and the spin-independent dark matter scattering cross section. In the CMSSM we find preferences for sparticle masses that are relatively light. In the NUHM1 the best-fit values for many sparticle masses are even slightly smaller, but with greater uncertainties. The likelihood functions for most sparticle masses are cut off sharply at small masses, in particular by the LEP Higgs mass constraint. Both in the CMSSM and the NUHM1, the coannihilation region is favoured over the focus-point region at about the 3-sigma level, largely but not exclusively because of g-2. Many sparticle masses are highly correlated in both the CMSSM and NUHM1, and most of the regions preferred at the 95% C.L. are accessible to early LHC running. Some slepton and chargino/neutralino masses should be in reach at the ILC. The masses of the heavier Higgs bosons should be accessible at the LHC and the ILC in portions of the preferred regions in the (M_A, tan beta) plane. In the CMSSM, the likelihood function for b to mu mu is peaked close to the Standard Model value, but much larger values are possible in the NUHM1. We find that values of the DM cross section > 10^{-10} pb are preferred in both the CMSSM and the NUHM1. We study the effects of dropping the g-2, b to s gamma, relic density and M_h constraints.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1892265

Report Number(s):: CERN-PH-TH-2009-124; FERMILAB-PUB-09-864; arXiv:0907.5568; oai:inspirehep.net:827593

Journal Information:: Eur.Phys.J.C, Vol. 64

Country of Publication:: United States

Language:: English

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