Luminosities and energies of e(+)e(-) collision data taken between root s=4.61 GeV and 4.95 GeV at BESIII
CHINESE PHYSICS C(2022)
摘要
From December 2019 to June 2021, the BESIII experiment collected approximately 5.85 fb(-1) of data at center-of-mass energies between 4.61 and 4.95 GeV. This is the highest collision energy BEPCII has reached to date. The accumulated e(+)e(-) annihilation data samples are useful for studying charmonium(-like) states and charmed-hadron decays. By adopting a novel method of analyzing the production of Lambda(+)(c)(Lambda) over bar (-)(c)pairs in e(+)e(-) annihilation, the center-of-mass energies are measured with a precision of similar to 0.6 MeV. Integrated luminosities are measured with a precision of better than 1% by analyzing the events of large-angle Bhabha scattering. These measurements provide important inputs to analyses based on these data samples.
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关键词
luminosity, center-of-mass energy, BESIII detector
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