Meromorphic differentials and twisted DR hierarchies for the Hodge CohFT

Xavier Blot; Paolo Rossi; Adrien Sauvaget

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arXiv · 2508.09899

Meromorphic differentials and twisted DR hierarchies for the Hodge CohFT

Xavier Blot·Paolo Rossi·Adrien Sauvaget

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Abstract

In [arXiv:2408.13806], two families of classical and quantum integrable hierarchies associated to arbitrary Cohomological Field Theories (CohFTs) were introduced: the meromorphic differential and twisted double ramification hierarchies. For trivial CohFT, the authors established a connection with the untwisted Double Ramification (DR) hierarchy. In this paper, we extend this study to the Hodge CohFT and prove an analogous correspondence with the untwisted DR hierarchy. This yields non-trivial identities between Hodge integrals over the DR cycle, the twisted DR cycle and the cycle of meromorphic differentials.

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Xavier Blot, Paolo Rossi, Adrien Sauvaget. 2025-08-13. Meromorphic differentials and twisted DR hierarchies for the Hodge CohFT. https://arxiv.org/abs/2508.09899

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