Search for the Exclusive Boson Hadronic Decays ±→±, ±→± and ±→± with the ATLAS Detector

A search for the exclusive hadronic decays ±→±⁢, ±→±⁢, and ±→±⁢ is performed using up to 140 fb−1 of proton-proton collisions recorded with the ATLAS detector at a center-of-mass energy of √=13 TeV. If observed, these rare processes would provide a unique test bench for the quantum chromodynamics factorization formalism used to calculate cross sections at colliders. Additionally, at future colliders, these decays could offer a new way to measure the boson mass through fully reconstructed decay products. The search results in the most stringent upper limits to date on the branching fractions ℬ⁡(±→±⁢)<1.9×10−6, ℬ⁡(±→±⁢)<1.7×10−6, ℬ⁡(±→±⁢)<5.2×10−6 at 95% confidence level.