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CP-odd form factor in the HWW vertex

A. I. Hernández-Juárez*, G. Tavares-Velasco, and J. Martínez-Ramón

  • *Contact author: alan.hernandezjua@alumno.buap.mx
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Phys. Rev. D 114, 053007 – Published 9 September, 2026

DOI: https://doi.org/10.1103/9j15-s9tt

Abstract

We revisit the CP-odd form factor in the HWW vertex within the Standard Model, 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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Phys. Rev. D 114, 053007– Published 9 September, 2026
  • Received 23 February 2026
  • Accepted 17 August 2026
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