Papers › Master integrals for e⁺e⁻→2γ process at large energies and angles
Master integrals for e⁺e⁻→2γ process at large energies and angles
Roman N. Lee, Vyacheslav A. Stotsky
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We calculate two-loop massive master integrals for e⁺e⁻→2γ in terms of generalized power series with respect to electron mass. The coefficients of this series are expressed via Goncharov's polylogarithms. Our approach exploits a number of modern multiloop methods: IBP reduction, differential equations for master integrals, Frobenius method, reduction to ϵ-form, and DRA method.
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