Quasiparticle interference and spectral function of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi mathvariant="normal">Ute</mml:mi> <mml:mn>2</mml:mn> </mml:msub> </mml:math> superconductive surface band

The authors investigate here superconducting UTe${}_{2}$ across a broad set of chiral and nonchiral order parameters and identify a clear experimental discriminator. A robust QPI peak, observed only in the superconducting state, emerges as the key fingerprint. Its dispersion and stability uniquely single out a B${}_{3u}$ pairing, which among the nonchiral pairing channels also appears to be the only one that exhibits a peak at zero energy in the DOS, consistent with the experimental observations.