Luminosity measurements for the R scan experiment at BESIII
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Date
2017
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Abstract
By analyzing the large-angle Bhabha scattering events e
+e
− → (γ)e+e
− and diphoton events e
+e
− →
(γ)γγ for the data sets collected at center-of-mass (c.m.) energies between 2.2324 and 4.5900 GeV (131 energy points
in total) with the upgraded Beijing Spectrometer (BESIII) at the Beijing Electron-Positron Collider (BEPCII), the
integrated luminosities have been measured at the different c.m. energies, individually. The results are important
inputs for the R value and J/ψ resonance parameter measurements.
Description
Keywords
luminosity, Bhabha, diphoton, R value