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arXiv · 2608.17106

$CP$-odd form factor in the $HWW$ vertex

A. I. Hernández-Juárez·G. Tavares-Velasco·J. Martínez-Ramón
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Abstract

We revisit the $CP$-odd form factor in the $HWW$ vertex within the Standard Model (SM), which is induced only at the one-loop level when one of the $W$ bosons is off-shell. To the best of our knowledge, the numerical evaluation of this form factor is presented for the first time. The relevant contributions from quark loops are of order $10^{-5}$, well below the current experimental sensitivity. The phenomenological implications are studied through asymmetries in unpolarized and polarized observables in three-body decays.

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A. I. Hernández-Juárez, G. Tavares-Velasco, J. Martínez-Ramón. 2026-08-17. $CP$-odd form factor in the $HWW$ vertex. https://doi.org/10.1103/9j15-s9tt

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