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A search for the hadronic decays of the $h_{c}$ meson to the final states$p\bar{p}\pi^{+}\pi^{-}\pi^{0}$, $p\bar{p}\eta$, and $p\bar{p}\pi^0$ via theprocess $\psi(3686) \to \pi^{0}{h_c}$ is performed using$(4.48\pm0.03)\times10^{8}$ $\psi(3686)$ events collected with the BESIIIdetector. The decay channel $h_{c}\to p\bar{p}\eta$ is observed for the firsttime with a significance greater than $5\sigma$ and a branching fraction of$\left( {6.41 \pm 1.74 \pm 0.53 \pm 1.00} \right) \times {10^{ -4}}$, where theuncertainties are statistical, systematic, and that from the branching fractionof $\psi(3686)\to\pi^{0}h_{c}$. Strong evidence for the decay ${h_c} \top\bar{p}{\pi^+}{\pi^-}{\pi^0}$ is found with a significance of $4.9\sigma$ anda branching fraction of $\left( {3.84 \pm 0.83 \pm0.69} \pm 0.58 \right) \times{10^{ - 3}}$. The significances include systematic uncertainties. No clearsignal of the decay $h_c\to p\bar{p}\pi^{0}$ is found, and an upper limit of$6.59\times 10^{-4}$ on its branching fraction is set at the 90% confidencelevel.

Search for new hadronic decays of $h_{c}$ and observation of $h_{c}\to p\bar{p}\eta$