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The l-loop Banana Amplitude from GKZ Systems and relative Calabi-Yau Periods

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arxiv 1912.06201 v2 pith:ADN6NLRA submitted 2019-12-12 hep-th math-phmath.MP

The $l$-loop Banana Amplitude from GKZ Systems and relative Calabi-Yau Periods

classification hep-th math-phmath.MP
keywords bananamassperiodsamplitudescalabi-yaulooprelativeresults
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

We use the GKZ description of periods and certain classes of relative periods on families of Barth-Nieto Calabi-Yau $(l-1)$-folds in order to solve the $l$-loop banana amplitudes with their general mass dependence. As examples we compute the mass dependencies of the banana amplitudes up to the three-loop case and check the results against the known results for special mass values.

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