PHY2061 R. D. Field Department of Physics relativity_9.doc University of Florida Relativistic Energy & MomentumConsider two frames of reference the O-frame(label energy and momentum according to E,px,py,pz) and the O'-frame(label energy and momentum according to E',px',py',pz') moving at a constant velocity V, with respect to each other at let the origins coincide at t= t' = 0. The Lorentz transformations tell us how the frames are related. zzyyxxxpccppccpEpccppcEE′=′=′+′=′+′=)()(βγzzyyxxxcppccppcEcppccpEE=′=′−=′−=′)()(where 21/1/−==cV. The following are Lorentz 4-vectors: =
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