cse • paper_2 • nuclear_particlecse-2025-subject-07-001
Mesons — UPSC CSE 2025 Physics PYQ
Buy PYQ Solution Manual →\rho^0 and \text{K}^0 mesons both decay mostly to \pi^+ and \pi^-. Why the mean lifetime of \rho^0 is 10^{-23} \text{ s}, whereas that of \text{K}^0 is 0\cdot 89 \times 10^{-10} \text{ s}?
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