Question: A neutral pion 0 moving at speed v = 0.98c decays in flight into two photons. If the two photons emerge on each side of

A neutral pion π0 moving at speed v = 0.98c decays in flight into two photons. If the two photons emerge on each side of the pion’s direction with equal angles θ find the angle θ and energies of the photons. The rest energy π0 is 135 MeV.

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