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Pion
A pi meson is a hadron that consists of a quark and an antiquark.
Explanation
Pions have spin 0 and are thus bosonic. The pion can be thought of as one of the particles that mediate the interaction between a pair of nucleons.
P i o n s π+
positive
pionπ−
negative
pionπ0
neutral
pion
HistoryBritish physicist Cecil Powell found the π-meson in 1947, during experiments with cosmic rays. Japanese physicist Hideki Yukawa (1907 - 1981) had previously predicted this particle. |