- #1
PhyAmateur
- 105
- 2
In the process $$e^+e^- \rightarrow \gamma \gamma$$
for which the amplitude can be written as: $$M= \epsilon^*_{1\nu}\epsilon^*_{2\mu}(A^{\mu\nu}+\tilde{A}^{\mu\nu})$$, where $$\epsilon_i$$ is the polarization vector of a photon.
How can one find the tensors $$A^{\mu\nu}$$ and $$\tilde{A}^{\mu\nu}$$?
for which the amplitude can be written as: $$M= \epsilon^*_{1\nu}\epsilon^*_{2\mu}(A^{\mu\nu}+\tilde{A}^{\mu\nu})$$, where $$\epsilon_i$$ is the polarization vector of a photon.
How can one find the tensors $$A^{\mu\nu}$$ and $$\tilde{A}^{\mu\nu}$$?