Tackling light higgsinos at the ILC
Mikael Berggren, Felix Br\"ummer, Jenny List, Gudrid Moortgat-Pick,, Tania Robens, Krzysztof Rolbiecki, Hale Sert

TL;DR
This paper investigates the potential of the International Linear Collider to precisely measure properties of light higgsinos in supersymmetric models, focusing on small mass differences and their implications for MSSM parameters.
Contribution
It presents a detailed simulation study of measuring light higgsino properties at the ILC, including mass differences, cross sections, and MSSM parameter inference, for specific benchmark scenarios.
Findings
Mass differences can be measured to 40-300 MeV.
Cross sections can be determined within 2-5%.
Higgsino mass parameter μ can be measured to 2-7 GeV.
Abstract
In supersymmetric extensions of the Standard Model, higgsino-like charginos and neutralinos are preferred to have masses of the order of the electroweak scale by naturalness arguments. Such light , and states can be almost mass degenerate, and their decays are then difficult to observe at colliders. In addition to the generic naturalness argument, light higgsinos are well motivated from a top-down perspective. For instance, they arise naturally in certain models of hybrid gauge-gravity mediation. In the present analysis, we study two benchmark points which have been derived in the framework of such a model, which exhibit mass differences of O(GeV) in the higgsino sector. For chargino pair and neutralino associated production with initial-state photon radiation, we simulate the detector response and determine how…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
