NLO Event Simulation for Chargino Production at the ILC

We present an extension of the Monte Carlo Event Generator Whizard which includes chargino production at the ILC at NLO. We include photons using both a fixed order and a resummation approach. While the fixed order approach suffers from negative event weights, the resummation method solves this problem and automatically includes leading higher order corrections. We present results for cross sections and event generation for both methods and evaluate the systematic errors due to soft and collinear approximations. In the resummation approach, the residual uncertainty can be brought down to the per-mil level.Comment: 4 pages, 6 figures; submitted for the SUSY07 proceeding

Monte Carlo Simulations for NLO Chargino Production at the ILC

We present an extension of the Monte Carlo Event Generator Whizard which includes chargino production at the ILC at NLO. We include photons using both a fixed order and a resummation approach. In the latter, leading higher order corrections are automatically included. We present results for cross sections and event generation for both methods.Comment: 4 pages, 6 figures, to appear in the proceedings of the International Linear Collider Workshop LCWS07, Hamburg, 2007 v2: updated bibliography informatio

LHC Benchmark Scenarios for the Real Higgs Singlet Extension of the Standard Model

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

The THDMa and possible e+e−e^+e^- signatures

I here discuss the THDMa, a type II two Higgs doublet model that is enhanced by an additional pseudoscalar which serves as a portal to the dark matter sector containing a fermionic dark matter andidate. I present a recent scan of the models parameter space where all parameters are allowed to float freely, and discuss prospects for this model at future $e^+e^-$ colliders for cases that are not covered in standard THDM searches.Comment: 6 pages, 3 figures; Talk presented at the 30th International Symposium on Lepton Photon Interactions at High Energies, hosted by the University of Manchester, 10-14 January 202

Models with (broken) Z2 symmetries

I discuss the allowed parameter space as well as collider prospects of several new physics models containing (broken) Z2 symmetries. I focus on effects of current constraints on these, and touch on several future collider options.Comment: 6 pages, 3 figures, 2 tables; proceedings of Discrete 2020-2021; v2: one abbreviation added, some publication information added. Corresponds to accepted proceedings versio

Two-Real-Singlet-Model Benchmark Planes

In this manuscript, I briefly review the Benchmark Planes in the Two-Real-Singlet Model (TRSM), a model that enhances the Standard Model (SM) scalar sector by two real singlets that obey a Z2 x Z2' symmetry. In this model, all fields acquire a vacuum expectation value, such that the model contains in total 3 CP-even neutral scalars that can interact with each other. All interactions with SM-like particles are inherited from the SM-like doublet via mixing. I remind the readers of the previously proposed benchmark planes, and briefly discuss possible production at future Higgs factories, as well as regions in a more generic scan of the model. For these, I also discuss the use of the W-boson mass as a precision observable to determine allowed/ excluded regions in the models parameter space. This work builds on a whitepaper submitted to the Snowmass process.Comment: 21 pages, 14 figures; extension of Whitepaper presented at arXiv:2205.14486; v2: slightly changed phrasing of abstract to clarify this is not a Snowmass Whitepape