Angle-dependent two-photon threshold

Uniform background and two free incoming photons; head-on E1E2≥me²c⁴, co-propagating photons fail.

Theory · DERIVEDEquation version 1.0.0

Based on the final manuscript · Chapters 4 and 5

\mathcal S=2E_1E_2(1-\cos\vartheta)\ge4m_e^2c^4

Uniform background and two free incoming photons; head-on E1E2≥me²c⁴, co-propagating photons fail.
Chapter reference: Ch. 4 (4.75)–(4.77) · ASD-BOOK-ddbade997b45

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Ch. 4 (4.75)–(4.77)

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Uniform background and two free incoming photons; head-on E1E2≥me²c⁴, co-propagating photons fail.

Source locators: p1546–p1554

Manuscript SHA-256: ddbade997b45913248e588953b1d27ccb9c7c206c3c8d992d3aef2364a64836e

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MAT-d1034a344d58 · Ch. 4 (4.75)–(4.77)

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