Amplitudes of photon-graviton scattering and the crossing process (annihilation of two photons into two gravitons and the reverse) are calculated. It is shown that the amplitudes are gradient invariant. It is also determined that upon scattering at any angle the spirality of photons and ravitons remains unchanged, and annihilation is possible only with identical spirality of photons (gravitons). The dependence of differential section on scattering angle is analyzed.
KeywordsDifferential Section Identical Spirality
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