Off-shell probes of the Higgs Yukawa couplings: light quarks and charm

TL;DR

This paper reviews current and future methods for measuring Higgs Yukawa couplings to light quarks and charm, emphasizing novel off-shell probes in triboson and boson-plus-jet final states, with promising sensitivity estimates for future colliders.

Contribution

It introduces new off-shell strategies for probing light quark and charm Yukawa couplings, expanding the experimental toolkit beyond traditional on-shell measurements.

Findings

Off-shell probes provide promising sensitivity for light quark Yukawas.

New strategies for charm Yukawa testing in boson-plus-jet final states.

Sensitivity estimates indicate potential for future colliders like HL-LHC and FCC-hh.

Abstract

We review the present status and the future prospects for the measurements of the Higgs Yukawa couplings to light quarks and charm. A special focus is given to novel proposed off-shell probes, which offer promising and complementary opportunities to test light quark Yukawas in triboson final states. Additionally, a new off-shell strategy to test the charm Yukawa coupling in the final state with two bosons plus a charm and a jet is considered. First estimates for the HL-LHC and the FCC-hh sensitivities on the channel are presented, showing encouraging results.