Search for Higgs boson exotic decays into Lorentz-boosted light bosons in the four-$\tau$ final state at $\sqrt{s}=13$ TeV with the ATLAS detector

ATLAS Collaboration

A search for exotic decays of the Higgs boson into a pair of low-mass scalars that subsequently decay into $\tau$-leptons, $H\to aa\to {\tau }^{+}{\tau }^{-}{\tau }^{+}{\tau }^{-}$, is presented. In…