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±0.02±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±0.03±0.85 MeV, where the first uncertainty is statistical and the second one is systematic.
Highlights
The state Y (2175), denoted as φ(2170) in Ref. [1], was first observed by the BaBar experiment [2, 3] in the initial-state-radiation (ISR) process e+e− →γISRφ(1020)f0(980), and was subsequently confirmed by BESII [4], Belle [5] and BESIII [6]
We present a determination of the integrated luminosity of this data set using large-angle
Using the approach described in Ref. [12], we determine the center-of-mass energy using radiative dimuon events e+e− →(γ)μ+μ−, where γ represents possible ISR or FSR photons
Summary
The state Y (2175), denoted as φ(2170) in Ref. [1], was first observed by the BaBar experiment [2, 3] in the initial-state-radiation (ISR) process e+e− →. The state Y (2175), denoted as φ(2170) in Ref. [1], was first observed by the BaBar experiment [2, 3] in the initial-state-radiation (ISR) process e+e− →. To study the Y (2175), a dedicated data set was collected with 2015 the at tBhEe ScIeInItedre-toefc-tmoars[s11e]naetrgtyhe(√BsE)PoCfII2.c1o2l5lidGereVin, which is in the vicinity of the peaking cross sections for e+e− → φππ and e+e− → φf0(980) decays reported by. BaBar [2, 3] and Belle [5]. We present a determination of the integrated luminosity of this data set using large-angle. A cross check is performed by analyzing di-photon events e+e− → γγ. [12], we determine the center-of-mass energy using radiative dimuon events e+e− →(γ)μ+μ−, where γ represents possible ISR or FSR (final state radiation) photons Using the approach described in Ref. [12], we determine the center-of-mass energy using radiative dimuon events e+e− →(γ)μ+μ−, where γ represents possible ISR or FSR (final state radiation) photons
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