Physicists Test a Fundamental Rule of Nature Using Collider Data
Researchers used measurements from the world's most powerful particle accelerator to test whether a basic symmetry of physics holds true in the top quark. The test found no violations, tightening constraints on exotic physics—a result that either confirms our current understanding or narrows where new discoveries might hide.
Originaltitel: Probing <em>CPT </em>Invariance with Top Quarks at the LHC
<p>The first model-independent sensitivity to 𝐶𝑃𝑇 violation in the top-quark sector is extracted from ATLAS and CMS measurements of the top and antitop kinematical mass difference. We find that the temporal component of a 𝐶𝑃𝑇-violating background field interacting with the top-quark vector current is restricted within the interval [−0.13,0.29] GeV at 95% confidence level.</p>