2023/08/28 by Mehta, Andrew, Rompotis, Nikolaos, Randles, Stephen
paper · doi:10.17181/7hbn8-3d233
The expected sensitivity, using statistical errors only, to the branching fraction of Higgs to invisible is given for the ZH process at the e+e- Future Circular Collider running at centre-of-mass energies of √(s)=240~GeV and √(s)=365~GeV with integrated luminosities of 10.8~ab-1 and 3~ab-1 respectively. The decays of the Z to electrons, muons, b-quarks, c-quarks and lighter quarks were investigated. It is found that a 25% measurement is possible if a Standard Model branching fraction of 0.106% for the process H→ ZZ^* → νννν is assumed. The Z→ qq channel has the best sensitivity. Additional new physics Higgs to invisible decays could be observed with a sensitivity of greater than 5σ if the branching fraction exceeds 0.13% or could be excluded at 0.052% at 95% confidence level.