Measurements of the center-of-mass energies at BESIII via the di-muon process

M. Ablikim; M. N. Achasov; X. C. Ai; O. Albayrak; M. Albrecht; D. J. Ambrose

doi:10.1088/1674-1137/40/6/063001

Chinese Physics C> 2016, Vol. 40> Issue(6) : 063001 DOI: 10.1088/1674-1137/40/6/063001

Measurements of the center-of-mass energies at BESIII via the di-muon process

1.
Institute of High Energy Physics, Beijing 100049, China
2.
G. I. Budker Institute of Nuclear Physics SB RAS(BINP), Novosibirsk 630090, Russia
3.
Also at the Novosibirsk State University, Novosibirsk, 630090, Russia
4.
Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
5.
Bochum Ruhr-University, D-44780 Bochum, Germany
6.
University of Rochester, Rochester, New York 14627, USA

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Abstract：
From 2011 to 2014, the BESIII experiment collected about 5 fb^-1 data at center-of-mass energies around 4 GeV for the studies of the charmonium-like and higher excited charmonium states. By analyzing the di-muon process e⁺e^-→γ_ISR/FSRμ⁺μ^-, the center-of-mass energies of the data samples are measured with a precision of 0.8 MeV. The center-of-mass energy is found to be stable for most of the time during data taking.
- center-of-mass energy ,
- di-muon process ,
- charmoniumlike states

References

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M. Ablikim, M. N. Achasov, X. C. Ai, O. Albayrak, M. Albrecht and D. J. Ambrose. Measurements of the center-of-mass energies at BESIII via the di-muon process[J]. Chinese Physics C, 2016, 40(6): 063001. doi: 10.1088/1674-1137/40/6/063001

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Received: 2015-11-11
Revised: 2016-02-04

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Supported by National Key Basic Research Program of China (2015CB856700), National Natural Science Foundation of China (11125525, 11235011, 11322544, 11335008, 11425524, Y61137005C), Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program, 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, U1332201), CAS (KJCX2-YW-N29, KJCX2-YW-N45), 100 Talents Program of CAS, National 1000 Talents Program of China, 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), Swedish Research Council, 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 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

Measurements of the center-of-mass energies at BESIII via the di-muon process

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