Measurement of the integrated luminosities of the data taken by BESIII at $\sqrt{s}=$ 3.650 and 3.773 GeV

Abstract

Data sets were collected with the BESIII detector at the BEPCII collider at the center-of-mass energy of $\sqrt{s}=$ 3.650 GeV during May 2009 and at $\sqrt{s}=$ 3.773 GeV from January 2010 to May 2011. By analyzing the large angle Bhabha scattering events, the integrated luminosities of the two data sets are measured %at $\sqrt{s}=$ 3.650 and 3.773 GeV to be ($44.49\pm 0.02\pm 0.44$) $\mathrm{p}{\mathrm{b}}^{-1}$ and ($2916.94\pm 0.18\pm 29.17$) $\mathrm{p}{\mathrm{b}}^{-1}$, respectively, where the first error is statistical and the second error is systematic.

arXiv comment6 pages