pi-meson
/pʌɪˈmiːzɒn
/ /pʌɪˈmɛzɒn/noun
Another term for pion.In 1947, English physicist Cecil Powell observed Yukawa's mesons, now called pi-mesons or pions, in the upper atmosphere, where they were produced by cosmic ray collisions....
- If, for example, the interaction between two protons in a nucleus is studied, quite good results can be obtained by describing it as an exchange of pi-mesons.