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arXiv · 2505.20463

A new probe of the quartic Higgs self-coupling

Ulrich Haisch·Aparna Sankar·Giulia Zanderighi
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Abstract

We calculate the corrections to the Higgs wave-function renormalization constant arising from modified cubic, quartic, and quintic Higgs self-couplings up to the two-loop level. Using our analytic results, we derive two-dimensional constraints on the modifications of the considered Higgs self-interactions that could potentially be set from precision measurements of single-Higgs production processes at the high-luminosity Large Hadron Collider (LHC) and a Future Circular Collider. Our novel constraints are compared to those that might be set by searches for multi-Higgs production at the same facilities. In view of the first LHC results on triple-Higgs production, we also review the current status of Higgs self-coupling determinations after LHC Run 2.

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Ulrich Haisch, Aparna Sankar, Giulia Zanderighi. 2025-05-26. A new probe of the quartic Higgs self-coupling. https://arxiv.org/abs/2505.20463

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