Search for ψ(4S)→ηJ/ψ in B±→ηJ/ψK± and e+e-→ηJ/ψ processes

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Xu-yang, Xiao-long Wang and Cheng-ping Shen. Search for ψ(4S)→ηJ/ψ in B±→ηJ/ψK± and e+e-→ηJ/ψ processes[J]. Chinese Physics C, 2016, 40(1): 013001. doi: 10.1088/1674-1137/40/1/013001
Xu-yang, Xiao-long Wang and Cheng-ping Shen. Search for ψ(4S)→ηJ/ψ in B±→ηJ/ψK± and e+e-→ηJ/ψ processes[J]. Chinese Physics C, 2016, 40(1): 013001.  doi: 10.1088/1674-1137/40/1/013001 shu
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Received: 2015-06-18
Revised: 2015-09-01
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    Supported by Fundamental Research Funds for the Central Universities (YWF-14-WLXY-013), National Natural Science Foundation of China (11575017) and CAS Center for Excellence in Particle Physics (China)

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Search for ψ(4S)→ηJ/ψ in B±→ηJ/ψK± and e+e-→ηJ/ψ processes

    Corresponding author: Cheng-ping Shen,
  • 1.  School of Physics and Nuclear Energy Engineering, Beihang UniversityXueyuan Road No.37, Haidian District, Beijing 100191, China
  • 2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
  • 3. CNP, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
Fund Project:  Supported by Fundamental Research Funds for the Central Universities (YWF-14-WLXY-013), National Natural Science Foundation of China (11575017) and CAS Center for Excellence in Particle Physics (China)

Abstract: We search for the ψ(4S) state in the B±→ηJ/ψK± and e+e-→ηJ/ψ processes based on the Belle measurements with the assumed mass M =(4230±8) MeV/c2 and width Γ =(38 12) MeV. No signi cant signal is observed in the ηJ/ψ mass spectra. The 90% con dence level upper limit on the product branching fraction B(B±→ ψ(4S)K±)B(ψ(4S)→ηJ/ψ)<6.8×10-6 is obtained in the B±→ηJ/ψK± decays. By assuming the partial width of ψ(4S)→e+e- to be 0.63 keV, a branching fraction limit B(ψ(4S)→ηJ/ψ)<1.3% is obtained at the 90% con dence level in e+e-→ηJ/ψ, which is consistent with the theoretical prediction.

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