Two-loop master integrals for e+e−→μ+μ− that require an electron-mass regulator are computed as a Frobenius expansion in the electron mass.
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Two-loop master integrals for $e^{+}e^{-}\rightarrow\mu^+\mu^-$ process with account of electron mass
Two-loop master integrals for e+e−→μ+μ− that require an electron-mass regulator are computed as a Frobenius expansion in the electron mass.