pi-meson

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Noun1.pi-meson - a meson involved in holding the nucleus together; produced as the result of high-energy particle collision
meson, mesotron - an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0
References in periodicals archive ?
To produce neutrinos the group used high-energy protons from a particle accelerator to bombard a beryllium target, producing a shower of protons, neutrons and the smaller pi-mesons (pions).
According to this technique, we can find many articles such as [5-9] which do not assume that the mass of the K-meson is heavy in front of the pi-meson one.