Supersymmetric models

Cosmological constraints on supersymmetric models are very powerful, and may even serve as a guidance in searching for supersymmetry. This partially justifies the extensive literature on the subject. The neutralino as dark matter is certainly fashionable. ... 

Figure 16.17. Complementarity of direct and indirect neutralino dark matter searches. The figure shows that several supersymmetric models that are within the (expected) reach of a big neutrino telescope of 10 km2 yr exposure are beyond the reach of current and future direct detection experiments. The vertical axis is the product of the neutralino-proton spin-independent scattering cross section

The limits for H and 4° in supersymmetric models refer to the benchmark scenario for the supersymmetric parameters. 

Haber, H.E. and G.L. Kane The Search for Supersymmetry Probing Physics Beyond the Standard Model, Physics Reports, 117(2, 3), 75 263 (January 1985). Haber, H.E. and G.L Kane Is Nature Supersymmetric Sci. Amer., 52-60 (June... 

We will discuss three cold dark matter candidates which are well-motivated , i.e. that have been proposed to solve problems in principle unrelated to dark matter and whose properties can be computed within a well-defined particle physics model. The three candidates we discuss are (1) a heavy active neutrino with standard model interactions, (2) the neutralino in the minimal super-symmetric standard model, and (3) the axion. Examples of other candidates that can be included in this category are a sterile neutrino (See e.g. Abazajian, Fuller, Patel (2001)) and other supersymmetric particles such as the grav-itino (See e.g. Ellis et al.(1984)) and the sneutrino (see, e.g.,Hall, Moroi Murayama( 1998)). 

We also indicate theoretical predictions for a Dirac neutrino with standard model couplings, and for the lightest neutralino in two supersymmetric scenarios minimal supergravity as in Ellis, Ferstl Olive (2000) (shaded yellow... 

Fig. 10. Muonium-antimuonium conversion in theories beyond the standard model. The interaction could be mediated by (a) a doubly charged Higgs boson A++ [52,53], (b) heavy Majorana neutrinos [52], (c) a neutral scalar [54], e.g. a supersymmetric r-sneutrino vT [55,56], or (d) a bileptonic gauge boson X++ [57]...

As he has done every two years, Dimitri V. Nanopoulos [78, 80] held the latest version of the lecture Beyond the Standard Model of Particle Physics , including the unique World Sheet theory possibly superseding the supersymmetric string theory. Although there is still a small probability for a fourth neutrino, it now seems almost certain that the other leptons and the quarks (-1-2/3 and — 1/3) occur in exactly 3 generations (needing a sixth t-(top) quark, at least heavier than 70 amu or twenty times the h-quark). All the participants... 

Limits are based on the Minimal Supersymmetric Standard Model. Assumptions include 1)/j (or y) is lightest supersyrnmetric particle 2) R-parity is conserved 3) with the exception of t and 6, all scalar quarks are assumed to be degenerate in mass and = m,q. 4) Limits for sleptons refer to the iy states. 

Limits are based on the Minimal Supersymmetric Standard Model. Assumptions include 1)X° (or 7) is lightest supersymmetric particle ... 

Finally, supersymmetric particles such as selectron pairs (ee), wino pairs WW) or smuons fifi) could be detected. The exact prediction of the production rates for these sparticles depends on many model-dependent parameters, so this effect is indicated simply by the shaded areas. 

This biennial Review summarizes much of particle physics. Using data from previous editions, plus 2658 new measurements from 644 papers, we hst, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons. We summarize searches for hypothetical particles such as Higgs bosons, heavy neutrinos, and supersymmetric particles. All the particle properties and search limits are listed in Summary Tables. We also give numerous tables, figures, formulae, and reviews of topics such as the Standard Model, par-... 

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