Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-08-16
ECONF C050318:0221,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages, 4 figures. Talk given at 2005 International Linear Collider Workshop (LCWS 2005), Stanford, California, 18-22 Mar 200
Scientific paper
Precision measurements, now and at a future linear electron-positron collider (ILC), can provide indirect information about the possible scale of supersymmetry. Performing a chi^2 analysis, we illustrate the present-day and possible future ILC sensitivities within the constrained minimal supersymmetric extension of the Standard Model (CMSSM), varying the parameters so as to obtain the cold dark matter density allowed by WMAP and other cosmological data. The current data are in very good agreement with the CMSSM prediction for tan beta = 10, with a clear preference for relatively small values of the universal gaugino mass, m_{1/2} \sim 300 GeV. In this case, there would be good prospects for observing supersymmetry directly at both the LHC and the ILC, and some chance already at the Tevatron collider. For tan beta = 50, the quality of the fit is worse, and somewhat larger m_{1/2} values are favoured. With the prospective ILC accuracies the sensitivity to indirect effects of supersymmetry greatly improves. This may provide indirect access to supersymmetry even at scales beyond the direct reach of the LHC or the ILC.
Ellis John
Heinemeyer Sven
Olive Keith
Weiglein Georg
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