2012/11/29 by H. K. Dreiner, F. Staub, A. Vicente
Physics and Astronomy · #hep-ph
paper · pdf · doi:10.1103/physrevd.87.035009
published as Phys. Rev. D 87, 035009 (2013) · 24 pages, 7 tables. arXiv admin note: text overlap with arXiv:1205.0557
arxiv created 2012/11/29 · arxiv updated 2013/03/14
We study the possible LHC collider signatures in the next-to-minimal supersymmetric Standard Model (NMSSM). The general NMSSM consists of 29 supersymmetric (SUSY) particles which can be mass ordered in 29! ≃ 9 ⋅ 1030 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! ≈ 1012 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 λ: (a) small: O(λ)< O(Yτ), (b) large: O(λ)≃ O(Ytop,Yb, Yτ) and (c) dominant: O(λ)>O(Ytop). We compare these three scenarios with the MSSM expectations as well as among each other. We also mention a possible mass hierarchy leading to 7 jets plus 1 lepton signatures at the LHC and comment briefly on the consequence of possible R-parity violation.