meson

Mesons can sometimes appear fleetingly on Earth, when high-energy cosmic rays collide with typical matter.

A type of meson called D0, for example, which contains charm quarks, is in a superposition of two normal matter particles called D1 and D2.

These are exciting prospects for investigating matter-antimatter asymmetry and the oscillations of mesons.

Mesons with zero electric charge continually undergo a phenomenon called mixing by which they spontaneously change into their antimatter particle, and vice versa.

One is the “pion cloud” model, a popular, decades-old approach that emphasizes the proton’s tendency to emit and reabsorb particles called pions, which belong to a group of particles known as mesons.

At the meson we found real rooms and true beds, and decided to stay for the night.

At half past eight we reached San Carlos, a mean town with no meson or other regular stopping-place.

We found shelter at a sort of a meson, where we could get no supper until nine, or possibly till ten.

The maximum intensity of this extracted meson beam depends on both the charge and energy desired.

This meson beam then travels through a hole in the concrete shielding wall into the meson cave.