Chinese Physics C > 2017, Vol. 41 > Issue(6): 063001 DOI: 10.1088/1674-1137/41/6/063001

Luminosity measurements for theRscan experiment at BESIII

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Abstract：
By analyzing the large-angle Bhabha scattering events e ⁺e ^-→( γ)e ⁺e ^-and diphoton events e ⁺e ^-→( γ) γ γfor 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 di erent c.m. energies, individually. The results are important inputs for the Rvalue and J/ Ψresonance parameter measurements.
- luminosity,
- Bhabha,
- diphoton,
- R value

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M. Ablikim, M. N. Achasov, S. Ahmed, X. C. Ai and et al. Luminosity measurements for the Rscan experiment at BESIII[J]. Chinese Physics C, 2017, 41(6): 063001. doi: 10.1088/1674-1137/41/6/063001

M. Ablikim, M. N. Achasov, S. Ahmed, X. C. Ai and et al. Luminosity measurements for the Rscan experiment at BESIII[J]. Chinese Physics C, 2017, 41(6): 063001. doi:10.1088/1674-1137/41/6/063001 shu

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Received: 2017-02-08

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Supported by National Key Basic Research Program of China (2015CB856700), National Natural Science Foundation of China (NSFC) (10935007, 11121092,11125525, 11235011, 11322544, 11335008, 11375170, 11275189,11079030, 11475164, 11475169, 11005109, 10979095, 11275211), Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program

Joint Large-Scale Scientific Facility Funds of the NSFC and CAS (11179007, U1232201, U1332201, U1532102). (KJCX2-YW-N29, KJCX2-YW-N45). 100 Talents Program of CAS, INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology, German Research Foundation DFG (Collaborative Research Center CRC-1044), Istituto Nazionale di Fisica Nucleare, Italy, Ministry of Development of Turkey (DPT2006K-120470), Russian Foundation for Basic Research (14-07-91152), U. S. Department of Energy (DE-FG02-04ER41291, DE-FG02-05ER41374, DE-FG02-94ER40823, DESC0010118), U.S. National Science Foundation, University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt, WCU Program of National Research Foundation of Korea (R32-2008-000-10155-0)

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沈阳化工大学材料科学与工程学院沈阳 110142

Luminosity measurements for theRscan experiment at BESIII

Received Date:2017-02-08
Available Online:2017-06-05

Fund Project:Supported by National Key Basic Research Program of China (2015CB856700), National Natural Science Foundation of China (NSFC) (10935007, 11121092,11125525, 11235011, 11322544, 11335008, 11375170, 11275189,11079030, 11475164, 11475169, 11005109, 10979095, 11275211), Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program Joint Large-Scale Scientific Facility Funds of the NSFC and CAS (11179007, U1232201, U1332201, U1532102). (KJCX2-YW-N29, KJCX2-YW-N45). 100 Talents Program of CAS, INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology, German Research Foundation DFG (Collaborative Research Center CRC-1044), Istituto Nazionale di Fisica Nucleare, Italy, Ministry of Development of Turkey (DPT2006K-120470), Russian Foundation for Basic Research (14-07-91152), U. S. Department of Energy (DE-FG02-04ER41291, DE-FG02-05ER41374, DE-FG02-94ER40823, DESC0010118), U.S. National Science Foundation, University of Groningen (RuG) and the Helmholtzzentrum fuer Schwerionenforschung GmbH (GSI), Darmstadt, WCU Program of National Research Foundation of Korea (R32-2008-000-10155-0)

Abstract:By analyzing the large-angle Bhabha scattering events e⁺e^-→(γ)e⁺e^-and diphoton events e⁺e^-→(γ)γγfor 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 di erent c.m. energies, individually. The results are important inputs for theRvalue andJ/Ψresonance parameter measurements.