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Measurements of Normalized Differential Cross Sections of Inclusive $\eta$ Production in $e^{+}e^{-}$ Annihilation at Energy from 2.0000 to 3.6710 GeV
Using data samples collected with the BESIII detector operating at the BEPCII storage ring, the cross section of the inclusive process $e^{+}e^{-} \to \eta + X$, normalized by the total cross section of $e^{+}e^{-} \to \text{hadrons}$, is measured at eight center-of-mass energy points from 2.0000 GeV to 3.6710 GeV. These …