Identifying the higgs-gauge boson couplings signs at leptonic colliders

Abstract

Abstract We investigate in this work the Higgs-gauge bosons couplings hVV (V = W, Z) through different final states at e + e − colliders. These couplings could be modified with respect to the SM in many SM extensions, as g h V V = κ V g h V V S M , either via radiative corrections or if the Higgs is composite. Therefore, we consider the final states b b ¯ + E T @ 250 G e V , h W + W − → b b ¯ + ℓ + ℓ − + E T @ 500 G e V ; and ZW + W − → jj + ℓ+ℓ− + ɆT @ 1 TeV within the corresponding luminosity at the ILC. Then, by considering that there will be no significant deviation with respect to the SM at HL-LHC, i.e., |δκV /κV | ≤ 0.04, we show that the sign of the hVV couplings can be probed to be κV = ±1.