The planar double box integral for top pair production with a closed top loop to all orders in the dimensional regularisation parameter

11 Sep 2018 Adams Luise Chaubey Ekta Weinzierl Stefan

We compute systematically for the planar double box Feynman integral relevant to top pair production with a closed top loop the Laurent expansion in the dimensional regularisation parameter $\varepsilon$. This is done by transforming the system of differential equations for this integral and all its sub-topologies to a form linear in $\varepsilon$, where the $\varepsilon^0$-part is strictly lower triangular... (read more)

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  • HIGH ENERGY PHYSICS - PHENOMENOLOGY
  • HIGH ENERGY PHYSICS - THEORY