New Physics Theory Bridges Dark Matter Mystery and Muon Experiments
Physicists have proposed a framework that could simultaneously explain dark matter's origins and resolve a persistent anomaly in muon behavior—a discrepancy that has puzzled researchers for decades. The model opens a path for experimental validation through both particle colliders and precision instruments, potentially reshaping how companies and governments prioritize next-generation physics research facilities.
Originaltitel: The Muonic Portal to Vector Dark Matter: connecting precision muon physics, cosmology, and colliders
<p>We present a comprehensive study of the Muonic Portal to Vector Dark Matter (MPVDM), a minimal extension of the Standard Model featuring a new SU (2)D gauge symmetry and vector-like muons that mediate interactions between the dark sector and the muon sector. We show that the MPVDM can simultaneously reproduce the observed dark matter relic abundance and accommodate scenarios consistent with the current experimental determination of the muon anomalous magnetic moment, (g - 2)mu, as well as scenarios allowing for a non-zero new physics contribution to (g - 2)mu. One of the key results of this work is the identification of a generic off-resonance velocity-suppression mechanism that allows light (less than or similar to 1 GeV) vector dark matter to evade stringent CMB constraints near 2mDM similar or equal to mHD\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {m}_{H_D} $$\end{document}. A five-dimensional parameter scan combining cosmological, collider, and precision constraints shows that scenarios admitting a non-zero contribution to (g - 2)mu favour sub-GeV dark matter realised near the scalar resonance with a dark gauge coupling gD similar to 10-3 and TeV-scale vector-like muons, while scenarios consistent with a Standard-Model-like (g - 2)mu allow a broad viable dark matter mass range from sub-GeV to multi-TeV. By recasting ATLAS and CMS searches for mu+mu- final states with missing transverse energy, we derive a lower bound of approximately 850 GeV on the vector-like muon masses. We further identify distinctive multi-lepton collider signatures, including six-, eight-, and ten-muon final states as well as mixed muon-electron topologies with displaced electron pairs, providing striking and well-motivated targets for searches at the LHC and future colliders.</p>