Chinese Physics C > 2016, Vol. 40 > Issue(1): 013001 DOI: 10.1088/1674-1137/40/1/013001

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

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

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Abstract：
We search for the ψ(4 S) 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/ c ²and 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(4 S)K ^±) B(ψ(4 S)→ηJ/ψ)<6.8×10 ^-6is obtained in the B ^±→ηJ/ψK ^±decays. By assuming the partial width of ψ(4 S)→e ⁺e ^-to be 0.63 keV, a branching fraction limit B(ψ(4 S)→ηJ/ψ)<1.3% is obtained at the 90% con dence level in e ⁺e ^-→ηJ/ψ, which is consistent with the theoretical prediction.
- (4S),
- J/,
- upper limit,
- branching fraction

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Xu-yang, Xiao-long Wang and Cheng-ping Shen. Search for ψ(4 S)→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

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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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1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Received Date:2015-06-18
Accepted Date:2015-09-01
Available Online:2016-01-20

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 massM=(4230±8) MeV/c²and widthΓ=(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 fractionB(B^±→ ψ(4S)K^±)B(ψ(4S)→ηJ/ψ)<6.8×10^-6is 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 limitB(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.