(a) A particle with rest mass (M) has kinetic energy (T). Show that the magnitude of its...

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(a) A particle with rest mass \(M\) has kinetic energy \(T\). Show that the magnitude of its momentum is image text in transcribed

(b) A particle \(A\) decays at rest into a lighter particle \(B\) and a photon \(\gamma\). Use four-vector methods to determine the energies of \(B\) and \(\gamma\) in terms of the rest masses \(m_{A}\) and \(m_{B}\) of \(A\) and \(B\).

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