For two body decay, in CM frame, we know that the magnitude of the final particle momentum is a constant, which can be described by a delta function, ##\delta(|\vec{p^*}|-|\vec{p_0^*}|)##, ##|\vec{p_0^*}|## is a constant.(adsbygoogle = window.adsbygoogle || []).push({});

When we go to lab frame (boost in z direction), what's the Lorentz transformation of the delta function?

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# Lorentz transformation of delta function

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