Study of the rare decay J/ψ→e+e-φ

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Xing-Dao Guo, Si-Run Xue, Hong-Wei Ke, Xue-Qian Li and Qiang Zhao. Study of the rare decay J/ψ→e+e-φ[J]. Chinese Physics C, 2016, 40(7): 073104. doi: 10.1088/1674-1137/40/7/073104
Xing-Dao Guo, Si-Run Xue, Hong-Wei Ke, Xue-Qian Li and Qiang Zhao. Study of the rare decay J/ψ→e+e-φ[J]. Chinese Physics C, 2016, 40(7): 073104.  doi: 10.1088/1674-1137/40/7/073104 shu
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Received: 2015-12-16
Revised: 2016-02-04
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    Supported by National Natural Science Foundation of China (11375128, 11425525), Sino-German CRC 110 Symmetries and the Emergence of Structure in QCD (11261130311)

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Study of the rare decay J/ψ→e+e-φ

    Corresponding author: Xing-Dao Guo,
    Corresponding author: Si-Run Xue,
    Corresponding author: Hong-Wei Ke,
    Corresponding author: Xue-Qian Li,
    Corresponding author: Qiang Zhao,
Fund Project:  Supported by National Natural Science Foundation of China (11375128, 11425525), Sino-German CRC 110 Symmetries and the Emergence of Structure in QCD (11261130311)

Abstract: We study the decay process of J/ψ→e+e-φ where the relatively clean electromagnetic (EM) transitions appear at leading order at tree level while the hadronic contributions only emerge via hadronic loop transitions. We include the low-lying scalar f0(980) and pseudoscalar η/η' as the dominant contributions in the evaluation of the hadronic loop contributions. It is found that the hadronic effects are negligible compared with the EM contributions. The decay width of J/ψ→e+e-φ is determined to be about 2.12×10-6 keV if there is no other leading mechanism contributing. This result will be tested by the BESIII experiment with a large J/ψ data sample.

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