Study of the rare decay J/&psi;&rarr;e<sup>+</sup>e<sup>-</sup>&phi;

Xing-Dao Guo; Si-Run Xue; Hong-Wei Ke; Xue-Qian Li; Qiang Zhao

doi:10.1088/1674-1137/40/7/073104

Chinese Physics C> 2016, Vol. 40> Issue(7) : 073104 DOI: 10.1088/1674-1137/40/7/073104

Study of the rare decay J/ψ→e⁺e^-φ

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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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References

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[3]	C. Z. Yuan et al (Belle Collaboration), Phys. Rev. Lett., 99:182004(2007)[arXiv:0707.2541[hep-ex]]
[4]	B. Guberina, J. H. Kuhn, R. D. Peccei et al, Nucl. Phys. B, 174:317(1980)
[5]	X.G. He and X.Q. Li, Phys. Lett. B, 640:28(2006)
[6]	K. A. Olive et al (Particle Data Group Collaboration), Chin. Phys. C, 38:090001(2014)
[7]	S. U. Chung, Phys. Rev. D, 48:1225(1993); 56:4419(1997)
[8]	E. D. Bloom and F. J. Gilman, Phys. Rev. D, 4:2901(1971)
[9]	T. Hahn and M. Perez-Victoria, Comput. Phys. Commun., 118:153(1999)

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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,

Received Date: 2015-12-16
Accepted Date: 2016-02-04
Available Online: 2016-07-05

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.