Light-quark Yukawa couplings from off-shell Higgs production
Abstract
Yukawa couplings of the first quark generation are notoriously difficult to constrain due to their small values within the Standard Model. Here we propose Higgs off-shell production, with the Higgs boson decaying to four leptons, as a probe of the up- and down-quark Yukawa couplings. Using kinematic discriminants similar to the ones employed in the Higgs width measurements we find that the down (up) Yukawa coupling can be constrained to a factor of 156 (260) times its Standard Model value at the high-luminosity LHC assuming only experimental systematic uncertainties. Off-shell Higgs production hence provides better sensitivity to the first-generation quark Yukawa couplings with respect to other probes such as Higgs+jet or Higgs pair production.
Keywords
Cite
@article{arxiv.2304.09772,
title = {Light-quark Yukawa couplings from off-shell Higgs production},
author = {Elisa Balzani and Ramona Gröber and Marco Vitti},
journal= {arXiv preprint arXiv:2304.09772},
year = {2023}
}
Comments
24 pages, 12 figures; comments and clarifications added, conclusions improved; version accepted for publication in JHEP