Griffiths Introduction to Elementary Particles · Problem 2.4

Relativistic Kinematics — David J. Griffiths

Physics — QFT · virtual-particles-feynman-diagrams

Problem

Determine the mass of the virtual photon in each of the lowest-order diagrams for Bhabha scattering (assume the electron and positron are at rest). What is its velocity? (Note that these answers would be impossible for real photons.)

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