The lifetimes of so-called resonance particles cannot be measured directly but is computed from the energy width
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The lifetimes of so-called resonance particles cannot be measured directly but is computed from the energy width (or uncertainty) of the scattering cross section versus energy graph. For example, the scattering of a pion (p meson) and a proton can produce a short-lived Δ resonance particle with a mass of 1685 MeV/c2 and an energy width of 250 MeV as shown in Figure 5-24: π + p → Δ. Compute the lifetime of the Δ.
Figure 5-24
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