Question
Use (5.41) to show that$$\bar{u}^{(s)} u^{(s)}=2 m, \quad \bar{v}^{(s)} v^{(s)}=-2 m .$$
Step 1
In quantum field theory, \( u^{(s)} \) and \( v^{(s)} \) are spinor solutions to the Dirac equation for particles and antiparticles, respectively. The quantities \( \bar{u}^{(s)} \) and \( \bar{v}^{(s)} \) are their Dirac adjoints, defined as \( \bar{u}^{(s)} = Show more…
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