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Focusing on the practical calculations of Feynman integrals, this book delves into expanding these integrals in relation to varying scales of momenta and masses. It presents a systematic approach to resolving the expansion problem through universal prescriptions that utilize Taylor series expansions of the integrand. The text emphasizes the importance of understanding asymptotic expansion at the diagrammatic level for operator-level expansions, illustrated through examples like operator product expansion and Heavy Quark Effective Theory, highlighting the factorization of contributions from different scales.
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Applied Asymptotic Expansions in Momenta and Masses, Vladimir A. Smirnov
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- 2010
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