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  • General NMSSM signatures at...
    Dreiner, H. K.; Staub, F.; Vicente, A.

    Physical review. D, Particles, fields, gravitation, and cosmology, 02/2013, Letnik: 87, Številka: 3
    Journal Article, Web Resource

    We study the possible LHC collider signatures in the next-to-minimal supersymmetric standard model. The general next-to-minimal supersymmetric standard model consists of 29 supersymmetric particles which can be mass ordered in 29! Asymptotically = to 9 x 10 super(30) ways. To reduce the number of hierarchies to a more manageable amount we assume a degeneracy of the sfermions of the first two generations with the same quantum numbers. Further assumptions about the neutralino and chargino masses leave 15 unrelated parameters. We check all 15! approximate 10 super(12) relevant mass orderings for the dominant decay chains and the corresponding collider signatures at the LHC. As preferred signatures, we consider charged leptons, missing transverse momentum, jets, and W, Z or Higgs bosons. We present the results for three different choices of the singlet to Higgs coupling lambda: (a) small, O(lambda) < O(Y sub(tau)), (b) large, O(lambda) Asymptotically = to O(Y sub(top), Y sub(b), Y sub(tau)), and (c) dominant, O(lambda) > O(Y sub(top)). We compare these three scenarios with the MSSM expectations as well as among each other. We also mention a possible mass hierarchy leading to seven jets plus one lepton signatures at the LHC and comment briefly on the consequence of possible R-parity violation.