| 单词 | R meson |
| 释义 | R meson [`är ´mā´sän] PARTICLE PHYSICS A meson resonance observed in missing mass experiments involving scattering of negative pions by protons; it has been resolved into three peaks labeled R1, R2, and R3, having masses of 1640, 1700, and 1750 MeV respectively, and is believed to have a spin of 3. |
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