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2019

Two-loop triangle integrals with 4 scales for the $HZV$ vertex

Wang, Yuxuan, Xu, Xiaofeng, Yang, Li Lin

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We calculate analytically the two-loop triangle integrals entering the $\mathcal{O}(\alpha\alpha_s)$ corrections to the $HZV$ vertex with $V=Z^*,\gamma^*$ using the method of differential equations.

Our result provides a prototype to study the analytic properties of multi-loop multi-scale Feynman integrals, and also allows fast numeric evaluation for phenomenological studies.
We apply our results to the leptonic decay of the Higgs boson and to $ZH$ production at electron-positron colliders.
Besides the top quark loop, we include also the bottom quark loop contributions, whose evaluation takes a lot of time using purely numeric methods, but is very efficient with our analytic results.

Two-loop triangle integrals with 4 scales for the $HZV$ vertex · Around

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