Measurement of the integrated luminosity and the center-of-mass energy of the data taken by BESIII at $\sqrt{s}=2.125$ GeV

Abstract

To study the nature of the state $Y(2175)$, a dedicated data set of $e^{+}{e}^{-}$ collision data was collected at the center-of-mass energy of 2.125 GeV with the BESIII detector at the BEPCII collider. By analyzing large-angle Bhabha scattering events, the integrated luminosity of this data set is determined to be $108.49\pm 0.02\pm 0.85$ pb${}^{-1}$, where the first uncertainty is statistical and the second one is systematic. In addition, the center-of-mass energy of the data set is determined with radiative dimuon events to be $2126.55\pm 0.03\pm 0.85$ MeV, where the first uncertainty is statistical and the second one is systematic.

To be published in Chin. Phys. C, update DOI information