The Hunt for Invisible Matter: A Narrowband Search for Axions

Researchers pushed the boundaries of dark matter detection with a highly sensitive haloscope experiment, refining the search for axions-hypothetical particles that could make up the universe’s missing mass.


![The convergence of [latex]\mathcal{Z}(g\_{\text{YM}},\phi)[/latex] and [latex]\mathcal{Z}\_{\text{ScYM}}(g\_{\text{YM}},\phi)[/latex] is dictated by rotational symmetry-a φ rotation of the integration contour induces a corresponding rotation of the divergent region, expanding until, at [latex]\phi=\pi/4[/latex], divergence dominates the second and fourth quadrants, after which convergence is localized within figure-eight domains through continued rotation beyond [latex]\arg(a)>\pi/4[/latex], with the formal sum of residues converging within the shaded regions and mirrored across the yy-axis for the negative contour.](https://arxiv.org/html/2602.05733v1/x4.png)





