Source: cirosantilli/pion
= Pion
{tag=Particle discovered with cosmic rays}
{title2=1947}
{wiki}
Conceptually the simplest <mesons>. All of them have neutral <color charge>:
* charged: down + anti-up or up + anti-down, therefore with net electrical charge $\pm1$ <electron charge>
* neutral: down + anti-down or up + anti-up, therefore with net electrical charge 0