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The existence of dark matter has been established in astrophysics. However,there is no candidate for DM in the Stand Model (SM). In SM, the Higgs bosoncan only decay invisibly via $H\rightarrow ZZ^\ast \rightarrow\nu\bar{\nu}\nu\bar{\nu}$ or DM, so any evidence of invisible Higgs decay thatexceeds BR (H$\rightarrow$inv.) will immediately point to a phenomenon that isbeyond the standard model (BSM). In this paper, we report on the upper limit ofBR (H$\rightarrow$invisible) estimated for three channels, including twoleptonic channels and one hadronic channel, under the assumption predicted bySM. With the SM ZH production rate, the upper limit of BR (H$\rightarrow$inv.)could reach 0.24\% at the 95\% confidence level.

Search for invisible decay of a Higgs boson produced at the CEPC