https://doi.org/10.1051/epjconf/202431501027
Top-quark Yukawa coupling with a dimension-6 operator
Faculty of Education, Iwate University, Morioka, Iwate 020-8550, Japan
* e-mail: yjzheng@iwate-u.ac.jp
Published online: 18 December 2024
We extend the standard top-quark Yukawa coupling with a dimension-6 operator in order to accommodate a CP violating complex phase with manifest gauge invariance. This leads to a new ttHH contact interaction, along with many Goldstone boson couplings. We investigate the impact of the new interactions on a muon collider process µ−µ+ → νµῡµtt¯H compared with the standard dimension-4 top-Yukawa coupling. The unitarity bounds on the coefficient of the new physics operator is obtained from WL−W+L and HH initiated processes.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
