Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-11-06
Phys.Lett.B532:318-328,2002
Physics
High Energy Physics
High Energy Physics - Phenomenology
15 pages, latex, 18 eps figures
Scientific paper
10.1016/S0370-2693(02)01553-8
We explore the allowed ranges of cross sections for the elastic scattering of neutralinos \chi on nucleons in the constrained minimal supersymmetric extension of the Standard Model (CMSSM), in which scalar and gaugino masses are each assumed to be universal at some input grand unification scale. We extend previous calculations to larger \tan \beta and investigate the limits imposed by the recent LEP lower limit on the mass of the Higgs boson and by b \to s \gamma, and those suggested by g_\mu - 2. The Higgs limit and b \to s \gamma provide upper limits on the cross section, particularly at small and large \tan \beta, respectively, and the value of g_\mu - 2 suggests a lower limit on the cross section for \mu > 0. The spin-independent nucleon cross section is restricted to the range 6 \times 10^{-8} pb > \sigma_{SI} > 2 \times 10^{-10} pb for \mu > 0, and the spin-dependent nucleon cross section to the range 10^{-5} pb > \sigma_{SD} > 2 \times 10^{-7} pb. Lower values are allowed if \mu <0.
Ellis John
Ferstl Andrew
Olive Keith A.
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