Exact nature and energy scale of physics beyond the Standard Model

Determine the exact nature and energy scale of physics beyond the Standard Model through experimental and theoretical investigation.

Background

To motivate the role of non‑collider experiments, the authors explicitly acknowledge that the exact nature and energy scale of beyond‑Standard‑Model (BSM) physics are unknown. They argue that dedicated beyond‑collider experiments are critical for exploring models and parameter spaces that may be inaccessible to flagship collider experiments.

Resolving this unknown would guide the design and prioritisation of complementary experimental programs across collider and beyond‑collider domains.

References

Since the exact nature and energy scale of beyond-standard-model physics remains unknown, dedicated and specialised beyond-collider experiments are critical in broadening the search.

— Early Career Researcher Input to the European Strategy for Particle Physics Update: White Paper  (2503.19862 - Arling et al., 25 Mar 2025) in Future particle physics projects, subsection “Importance of beyond‑collider particle physics in the European landscape”

However, the debate regarding SUSY remains still open $\ldots$

— The alternative scalar field dark sector of the Universe: Cosmological inflation, quintessence and ekpyrotic model in the framework of scalar-tensor cosmology  (2609.37293 - Postolak, 29 Sep 2026) in Chapter 3, Section “Symmetries and SUSY,” subsection “Symmetries and SUSY”