Determination of the number of J/&psi; events with inclusive J/&psi; decays

M. Ablikim; et al(BESIII Collaboration)

doi:10.1088/1674-1137/41/1/013001

Chinese Physics C> 2017, Vol. 41> Issue(1) : 013001 DOI: 10.1088/1674-1137/41/1/013001

Determination of the number of J/ψ events with inclusive J/ψ decays

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Abstract：
A measurement of the number of J=/ψ events collected with the BESIII detector in 2009 and 2012 is performed using inclusive decays of the J=/ψ. The number of J=/ψ events taken in 2009 is recalculated to be (223:7±1:4)×10⁶, which is in good agreement with the previous measurement, but with signi cantly improved precision due to improvements in the BESIII software. The number of J=/ψ events taken in 2012 is determined to be (1086:9±6:0)×10⁶. In total, the number of J=/ψ events collected with the BESIII detector is measured to be (1310:6±7:0)×10⁶, where the uncertainty is dominated by systematic effects and the statistical uncertainty is negligible.
- number of J/ events ,
- BESIII detector ,
- inclusive J/ events

References

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M. Ablikim and et al(BESIII Collaboration). Determination of the number of J/ψ events with inclusive J/ψ decays[J]. Chinese Physics C, 2017, 41(1): 013001. doi: 10.1088/1674-1137/41/1/013001

M. Ablikim and et al(BESIII Collaboration). Determination of the number of J/ψ events with inclusive J/ψ decays[J]. Chinese Physics C, 2017, 41(1): 013001. doi: 10.1088/1674-1137/41/1/013001 shu

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Received: 2016-07-05
Revised: 2016-08-26

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Supported by National Key Basic Research Program of China (2015CB856700), National Natural Science Foundation of China (NSFC) (10805053, 11125525, 11175188, 11235011, 11322544, 11335008, 11425524), Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program, the CAS Center for Excellence in Particle Physics (CCEPP), Collaborative Innovation Center for Particles and Interactions (CICPI), Joint Large-Scale Scientific Facility Funds of NSFC and CAS (11179007, U1232201, U1232107, U1332201), CAS (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

Determination of the number of J/ψ events with inclusive J/ψ decays

Received Date: 2016-07-05
Accepted Date: 2016-08-26
Available Online: 2017-01-05

Fund Project: Supported by National Key Basic Research Program of China (2015CB856700), National Natural Science Foundation of China (NSFC) (10805053, 11125525, 11175188, 11235011, 11322544, 11335008, 11425524), Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program, the CAS Center for Excellence in Particle Physics (CCEPP), Collaborative Innovation Center for Particles and Interactions (CICPI), Joint Large-Scale Scientific Facility Funds of NSFC and CAS (11179007, U1232201, U1232107, U1332201), CAS (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: A measurement of the number of J=/ψ events collected with the BESIII detector in 2009 and 2012 is performed using inclusive decays of the J=/ψ. The number of J=/ψ events taken in 2009 is recalculated to be (223:7±1:4)×10⁶, which is in good agreement with the previous measurement, but with signi cantly improved precision due to improvements in the BESIII software. The number of J=/ψ events taken in 2012 is determined to be (1086:9±6:0)×10⁶. In total, the number of J=/ψ events collected with the BESIII detector is measured to be (1310:6±7:0)×10⁶, where the uncertainty is dominated by systematic effects and the statistical uncertainty is negligible.