Muonic hydrogen cascade time and lifetime of the short-lived $2S$ state

L. Ludhova, F. D. Amaro, A. Antognini +24

Metastable $2S$ muonic-hydrogen atoms undergo collisional $2S$-quenching, with rates which depend strongly on whether the $\mu p$ kinetic energy is above or below the ${2S}\to {2P…