The meson has a measured mean lifetime and a branching ratio .

PHYSICS · Multi-part · Fermi University Physics · Particle Physics & Quantum Fields · Particles, interactions and experiment · Particles, interactions and experiment

Particle Physics, Ch Decay rates, cross sections and phase space

Problem

The D+D^+ meson has a measured mean lifetime τ=1.033×10−12 s\tau = 1.033\times10^{-12}\,\mathrm{s} and a branching ratio B(D+→K−π+π+)=9.38%\mathcal{B}(D^+ \to K^-\pi^+\pi^+) = 9.38\%. ((a)) Find the total decay width Γ\Gamma of the D+D^+, in eV\mathrm{eV}. ((b)) Find the partial width for D+→K−π+π+D^+ \to K^-\pi^+\pi^+, in eV\mathrm{eV}.

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