We study angular observables in the e⁺e⁻→ ZH→ ⁺⁻bb̄ channel at future circular e + e − colliders such as CEPC and FCC-ee. Taking into account the impact of realistic cut acceptance and detector effects, we forecast the precision of six angular asymmetries at CEPC (FCC-ee) with center-of-mass energy √s=240 GeV and 5 (30) ab−1 integrated luminosity. We then determine the projected sensitivity to a range of operators relevant for he Higgs-strahlung process in the dimension-6 Higgs EFT. Our results show that angular observables provide complementary sensitivity to rate measurements when constraining various tensor structures arising from new physics. We further find that angular asymmetries provide a novel means of both probing BSM corrections to the HZγ coupling and constraining the “blind spot” in indirect limits on supersymmetric scalar top partners.
No takes yet. Share an insight, caveat, or question.
Craig et al. (2016) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: