and muon colliders

Why have neither supersymmetric particles nor dark matter WIMPs (weakly interacting massive particles) been observed, despite the strong optimism regarding their existence that has prevailed in the theoretical community for about 40 years? The present speaker, with collaborators [1], has performed calculations that are relevant to a unified description which may help to answer both these questions, in which superpartners have modified experimental signatures and dark matter WIMPs have reduced detection cross-sections. Specifically, the present speaker has performed detailed calculations of cross-sections for production and decay of supersymmetric partners, and for detection of dark matter WIMPs [2,3], at the electron-positron and muon colliders supported in the recommendations of the 2023 P5 (Particle Physics Project Prioritization Panel). The results demonstrate that these future colliders will be able to definitively see superpartners and the proposed dark matter particle if the present theory is correct, even though they have evaded detection at colliders that are less powerful or for which the analysis is more complicated.

[1] Jehu Martinez, Aleksy Rodriguez, and Dario Ramirez-Pico, to be published.

[2] Bailey Tallman, ..., Jehu Martinez, et al., “Indirect detection, direct detection, and collider detection cross-sections for a 70 GeV dark matter WIMP”, proceedings of ICHEP 2022, arXiv:2210.05380 [hep-ph], and references therein.

[3] Bailey Tallman, ..., Jehu Martinez, et al., “Potential for definitive discovery of a 70 GeV dark matter WIMP with only second- order gauge couplings”, Letters in High Energy Physics LHEP-342 (2023), arXiv:2210.15019 [hep-ph], and references therein.