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Elementary Particles

Problem 6.296

6.296.6.296 . Find the kinetic energy of a neutron emerging as a result of the decay of a stationary Σ−\Sigma^{-} hyperon (Σ−→n+π−)\left(\Sigma-\rightarrow n+\pi^{-}\right).

Reveal Answer
T=[(mΣ−mn)2−mπ2]/2mΣ=19.5MeVT=\left[\left(m_{\Sigma}-m_{n}\right)^{2}-m_{\pi}^{2}\right] / 2 m_{\Sigma}=19.5 \mathrm{MeV}
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