| Answer | Crossword Clue |
|---|---|
| PSI | ... particle (unstable meson) |
| KAON | Unstable meson |
| ETA | ... meson (subatomic particle) |
| ETA | ... particle (electrically neutral meson) |
| mesotron | a subatomic particle, also MESON |
| mesons | MESON, a subatomic particle, also MESOTRON |
| mesotrons | MESOTRON, a subatomic particle, also MESON |
| ETA | ... meson (particle that is its own antiparticle) |
| mesonic | resembling a meson (a subatomic particle, also MESOTRON) |
| upsilons | A meson thought to contain a b quark bound to its antiparticle, produced in particle accelerators |
| bosonic | a particle (as a photon or meson) whose spin is zero or an integral number compare fermion |
