Π-meson

Key Stage 5

Meaning

A π-meson is a type of meson which has a strangeness of zero.

About π-mesons

NB: You do not need to memorise the exact composition of a given π-meson. However, you should be able to determine a possible quark composition given the charge of the meson and by remembering the properties of the up-quark, down-quark.

π-meson may consist of:

• Up-antidown quark pair (π⁺).
• Down-antiup quark pair (π^-).
• Up-antiup quark pair (π⁰).
• Down-antidown quark pair (π⁰).
• Strange-antistrange quark pair (π⁰).