We present benchmark scenarios for searches for an additional Higgs state in
the real Higgs singlet extension of the Standard Model in Run 2 of the LHC. The
scenarios are selected such that they fulfill all relevant current theoretical
and experimental constraints, but can potentially be discovered at the current
LHC run. We take into account the results presented in earlier work and update
the experimental constraints from relevant LHC Higgs searches and signal rate
measurements. The benchmark scenarios are given separately for the low mass and
high mass region, i.e. the mass range where the additional Higgs state is
lighter or heavier than the discovered Higgs state at around 125 GeV. They have
also been presented in the framework of the LHC Higgs Cross Section Working
Group.Comment: 23 pages, 9 tables, 4 figures. arXiv admin note: text overlap with
arXiv:1501.02234; v2: one subsection, one figure, and some references added,
minor errors corrected. Corresponds to published journal versio
