Roger Pink writes:
Researchers are using the X-Rays emitted by kaonic hydrogen
when it decays from an excited state to its ground state, to better understand its properties. Kaonic hydrogen is a hydrogen atom with a kaon instead of an electron. It turns out that when kaonic hydrogen is in its ground state, the strong force, which only is significant for very short distances, suddenly becomes important and the ground state energy level "broadens".
Applications?
