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Updated post-WMAP benchmarks for supersymmetry

  • theoretical physics
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Abstract.

We update a previously-proposed set of supersymmetric benchmark scenarios, taking into account the precise constraints on the cold dark matter density obtained by combining WMAP and other cosmological data, as well as the LEP and \(b \rightarrow s \gamma\) constraints. We assume that R parity is conserved and work within the constrained MSSM (CMSSM) with universal soft supersymmetry-breaking scalar and gaugino masses m 0 and m 1/2. In most cases, the relic density calculated for the previous benchmarks may be brought within the WMAP range by reducing slightly m 0, but in two cases more substantial changes in m 0 and m 1/2 are made. Since the WMAP constraint reduces the effective dimensionality of the CMSSM parameter space, one may study phenomenology along “WMAP lines” in the (m 1/2, m 0) plane that have acceptable amounts of dark matter. We discuss the production, decays and detectability of sparticles along these lines, at the LHC and at linear e + e - colliders in the sub- and multi-TeV ranges, stressing the complementarity of hadron and lepton colliders, and with particular emphasis on the neutralino sector. Finally, we preview the accuracy with which one might be able to predict the density of supersymmetric cold dark matter using collider measurements.

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Authors and Affiliations

  1. CERN, Geneva, Switzerland

    M. Battaglia, A. De Roeck, J. Ellis, F. Gianotti & L. Pape

  2. William I. Fine Theoretical Physics Institute, University of Minnesota, MN 55455, Minneapolis, USA

    K. A. Olive

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  1. M. Battaglia
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  2. A. De Roeck
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Received: 2 September 2003, Published online: 4 February 2004

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Battaglia, M., Roeck, A.D., Ellis, J. et al. Updated post-WMAP benchmarks for supersymmetry. Eur. Phys. J. C 33, 273–296 (2004). https://doi.org/10.1140/epjc/s2003-01575-7

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