Measurement of the leptonic decay width of J/ψ using initial state radiation
- Ablikim, M.
- Achasov, M.N.
- Ai, X.C.
- Albayrak, O.
- Albrecht, M.
- Ambrose, D.J.
- Amoroso, A.
- An, F.F.
- An, Q.
- Bai, J.Z.
- Baldini Ferroli, R.
- Ban, Y.
- Bennett, D.W.
- Bennett, J.V.
- Bertani, M.
- Bettoni, D.
- Bian, J.M.
- Bianchi, F.
- Boger, E.
- Boyko, I.
- Briere, R.A.
- Cai, H.
- Cai, X.
- Cakir, O.
- Calcaterra, A.
- Cao, G.F.
- Cetin, S.A.
- Chang, J.F.
- Chelkov, G.
- Chen, G.
- Chen, H.S.
- Chen, H.Y.
- Chen, J.C.
- Chen, M.L.
- Chen, S.J.
- Chen, X.
- Chen, X.R.
- Chen, Y.B.
- Cheng, H.P.
- Chu, X.K.
- Cibinetto, G.
- Dai, H.L.
- Dai, J.P.
- Dbeyssi, A.
- Dedovich, D.
- Deng, Z.Y.
- Denig, A.
- Denysenko, I.
- Destefanis, M.
- De Mori, F.
- Ding, Y.
- Dong, C.
- Dong, J.
- Dong, L.Y.
- Dong, M.Y.
- Du, S.X.
- Duan, P.F.
- Eren, E.E.
- Fan, J.Z.
- Fang, J.
- Fang, S.S.
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- Fava, L.
- Feldbauer, F.
- Felici, G.
- Feng, C.Q.
- Fioravanti, E.
- Fritsch, M.
- Fu, C.D.
- Gao, Q.
- Gao, X.Y.
- Gao, Y.
- Gao, Z.
- Garzia, I.
- Geng, C.
- Goetzen, K.
- Gong, W.X.
- Gradl, W.
- Greco, M.
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- Haddadi, Z.
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- Harris, F.A.
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- Held, T.
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- Hu, H.M.
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- Hussain, T.
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- Johansson, T.
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- Kalantar-Nayestanaki, N.
- Kang, X.L.
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- Kavatsyuk, M.
- Ke, B.C.
- Kiese, P.
- Kliemt, R.
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- Kolcu, O.B.
- Kopf, B.
- Kornicer, M.
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- Lange, J.S.
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- Leng, C.
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- Maggiora, M.
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- Mao, Z.P.
- Marcello, S.
- Messchendorp, J.G.
- Min, J.
- Min, T.J.
- Mitchell, R.E.
- Mo, X.H.
- Mo, Y.J.
- Morales Morales, C.
- Moriya, K.
- Muchnoi, N.Yu.
- Muramatsu, H.
- Nefedov, Y.
- Nerling, F.
- Nikolaev, I.B.
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- Rashid, K.H.
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- Ren, H.L.
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- Rosner, Ch.
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- Tang, X.
- Tapan, I.
- Thorndike, E.H.
- Tiemens, M.
- Ullrich, M.
- Uman, I.
- Varner, G.S.
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- Wang, Z.G.
- Wang, Z.H.
- Wang, Z.Y.
- Weber, T.
- Wei, D.H.
- Wei, J.B.
- Weidenkaff, P.
- Wen, S.P.
- Wiedner, U.
- Wolke, M.
- Wu, L.H.
- Wu, Z.
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- Ye, M.
- Ye, M.H.
- Yin, J.H.
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- Yu, J.S.
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- Yuan, W.L.
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- Zafar, A.A.
- Zallo, A.
- Zeng, Y.
- Zhang, B.X.
- Zhang, B.Y.
- Zhang, C.
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- Zhang, H.H.
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- Zhang, Yu
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- Zhang, Z.Y.
- Zhao, G.
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- Zhao, J.Y.
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- Zhao, Ling
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- Zhemchugov, A.
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- Zheng, J.P.
- Zheng, W.J.
- Zheng, Y.H.
- Zhong, B.
- Zhou, L.
- Zhou, Li
- Zhou, X.
- Zhou, X.K.
- Zhou, X.R.
- Zhou, X.Y.
- Zhu, K.
- Zhu, K.J.
- Zhu, S.
- Zhu, X.L.
- Zhu, Y.C.
- Zhu, Y.S.
- Zhu, Z.A.
- Zhuang, J.
- Zotti, L.
- Zou, B.S.
- Zou, J.H.
Publication date
October 2016
DOI Publisher
The Author(s). Published by Elsevier B.V.Abstract
AbstractUsing a data set of 2.93 fb−1 taken at a center-of-mass energy of s=3.773 GeV with the BESIII detector at the BEPCII collider, we measure the process e+e−→J/ψγ→μ+μ−γ and determine the product of the branching fraction and the electronic width Bμμ⋅Γee=(333.4±2.5stat±4.4sys) eV. Using the earlier-published BESIII result for Bμμ=(5.973±0.007stat±0.037sys)%, we derive the J/ψ electronic width Γee=(5.58±0.05stat±0.08sys) keV
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