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Leading logarithms of the two-point function in massless O(N) and SU(N) models to any order from analyticity and unitarity

Ananthanarayan, B. ; Ghosh, Shayan ; Vladimirov, Alexey ; Wyler, Daniel


Leading (large) logarithms in non-renormalizable theories have been investigated in the recent past. Besides some general considerations, explicit results for the expansion coefficients (in terms of leading logarithms) of partial wave amplitudes and of scalar and vector form factors have been given. Analyticity and unitarity constraints have been used to obtain the expansion coefficients of ...


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