Potential for Discovery of a Proposed 70 GeV Dark Matter WIMP

This talk will review recent results in our group on a dark matter particle that we have proposed [1,2,3]. As astronomical observations and their interpretation improve, the case for cold dark matter (CDM) becomes increasingly persuasive. A particularly appealing version of CDM is a weakly interacting massive particle (WIMP) with a mass near the electroweak scale, which can naturally have the observed relic abundance after annihilation in the early universe. But in order for a WIMP to be consistent with the currently stringent experimental constraints it must have relatively small cross-sections for indirect, direct, and collider detection. Based on earlier and ongoing calculations in our group [1,2,3], here we will discuss the potential for discovery of our proposed dark matter WIMP, which has a mass of about 70 GeV and only second-order couplings to W and Z bosons. There is evidence that indirect detection may already have been achieved, by the satellite experiments Fermi-LAT and AMS-02. The underground experiments LZ and XENONnT, and later other experiments such as DARWIN/XLZD, may achieve direct detection within the next 5-15 years. And the high-luminosity LHC may achieve collider detection within about 15 years. Definitive confirmation should come from the still more powerful proton, electron-positron, and muon collider experiments planned for the next 15–40 years.

[1] 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.

[2] Bailey Tallman, ..., Jehu Martinezet, 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.

[3] Bailey Tallman, Kane Rylander, and Alzaib Maknojia, to be published; Jehu Martinez, Aleksy Rodriguez, and Dario Ramirez-Pico, to be published; Rohan Shankar and Viviana Garcia, work in progress.