This isn't really so much of a homework problem, but I'm reading this webpage, and there's one part of the derivation of the required proton KE needed to produce a static antiproton.(adsbygoogle = window.adsbygoogle || []).push({});

The part that's puzzling me is

"and using... m^{2}_{in}c^{4}- p^{2}_{in}c^{2}= m^{2}_{0}c^{4}"

I don't see where this formula is coming from. I can see the resemblance to the invariant, but the RHS deals with the moving proton, and the LHS only has the mass of a single proton, I'm confused as to why it's not (2m_{0})^{2}c^{4}.

Thanks for any help.

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# Homework Help: Relativistic Antiproton Protion

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