The ILC as a natural SUSY discovery machine and precision microscope: From light higgsinos to tests of unification
| Autor: | Jenny List, Tomohiko Tanabe, Suvi-Leena Lehtinen, Swathi Sasikumar, Howard Baer, Mikael Berggren, Keisuke Fujii, Jacqueline Yan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
gaugino: production
Particle physics Higgsino: production Microscope gaugino: mass Unification electron positron: scattering parameter space [supersymmetry] mass [Higgsino] ILC Coll Natural (archaeology) symmetry breaking [supersymmetry] scattering [electron positron] law.invention production [gaugino] law ddc:530 supersymmetry: symmetry breaking mass [gaugino] mirage [mediation] Physics production [Higgsino] electron positron: linear collider new physics ILD detector High Energy Physics::Phenomenology mediation: mirage Supersymmetry supersymmetry: parameter space High Energy Physics::Experiment Higgsino: mass naturalness linear collider [electron positron] |
| Zdroj: | Proceedings of Science / International School for Advanced Studies (EPS-HEP2019), 596 (2020). doi:10.22323/1.364.0596 The European Physical Society-High Energy Physics Conference 2019, EPS-HEP 2019, Ghent, Belgium, Belgium, 2019-07-10-2019-07-17 |
| DOI: | 10.22323/1.364.0596 |
| Popis: | The European Physical Society - High Energy Physics Conference 2019, EPS-HEP 2019, Ghent, Belgium, Belgium, 10 Jul 2019 - 17 Jul 2019; Proceedings of Science / International School for Advanced Studies (EPS-HEP2019), 596 (2020). doi:10.22323/1.364.0596 The requirement of electroweak naturalness in simple supersymmetric models motivates the existence of a cluster of four light higgsinos with mass $100 - 300$ GeV, the lighter the better. While such light compressed spectra may be challenging to observe at the LHC, future $e^+e^-$ colliders with $\sqrt{s} > 2$m(higgsino) would serve as both a SUSY discovery machine and a precision microscope. We study signatures of higgsino pair production at the ILC based on full, Geant4-based simulation of the ILD detector concept. We examine several benchmark scenarios that may or may not be accessible to HL-LHC searches, with mass differences between the higgsino states between 4 and 20 GeV. Assuming $\sqrt{s}\geq$ 500 GeV and $1000$ fb$^{-1}$ of integrated luminosity, the individual higgsino masses can be measured to $1 - 2\%$ precision in case of the larger mass differences, and at the level of 5$\%$ for the smallest mass difference case. The higgsino mass splittings are sensitive to the electroweak gaugino masses and can allow extraction of gaugino masses to $3 - 20\%$ (depending on the model).Extrapolation of gaugino masses via renormalization group running can test the hypothesis of gaugino mass unification. We also examine a case with natural generalized mirage mediation where the unification of gaugino masses at an intermediate scale apparently gives rise to a natural SUSY spectrum somewhat beyond the reach of the HL-LHC. Published by SISSA, Trieste |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|