subatomic particle with a mass equal to 270 electron masses. It may be neutral or charged positively or negatively. Also known as pi-meson.

The lightest meson having a positive or negative charge and a rest mass 273 times that of the electron, or no charge and a rest mass 264 times that of the electron. It is the most important contributor to the force which binds the atomic nucleus together.

An unstable nuclear particle with a rest mass between that of an electron and a proton. Also known as the pi meson.

a meson involved in holding the nucleus together; produced as the result of high-energy particle collision

a subatomic particle (very small, see Quantum Physics Is

A subatomic particle composed of a quark and an anti-quark. Not seen under everyday conditions, but produced at high temperatures or in reactions between atoms.

(): The least massive type of meson, pions can have electric charges of +1, -1, or 0.

The least massive known spin-0 meson. The three charge states of the pion (negative, neutral and positive) are involved in the long-range force between the nucleons.

an elementary particle associated with the nuclear force field, larger than a muon, they occur in positive, negative, and uncharged forms all with the same mass (about 270 e) and zero spin

In particle physics, pion (short for pi meson) is the collective name for three subatomic particles: π0, π+ and π−. Pions are the lightest mesons and play an important role in explaining low-energy properties of the strong nuclear force.