Search for the electromagnetic Dalitz decays <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msub> <mml:mi>χ</mml:mi> <mml:mrow> <mml:mi>c</mml:mi> <mml:mi>J</mml:mi> </mml:mrow> </mml:msub> <mml:mo stretchy="false">→<

Using a data sample of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mo stretchy="false">(</a:mo> <a:mn>2.712</a:mn> <a:mo>±</a:mo> <a:mn>0.014</a:mn> <a:mo stretchy="false">)</a:mo> <a:mo>×</a:mo> <a:msup> <a:mn>10</a:mn> <a:mn>9</a:mn> </a:msup> <a:mtext> </a:mtext> <a:mtext> </a:mtext> <a:mi>ψ</a:mi> <a:mo stretchy="false">(</a:mo> <a:mn>3686</a:mn> <a:mo stretchy="false">)</a:mo> </a:math> events collected at <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:msqrt> <g:mi>s</g:mi> </g:msqrt> <g:mo>=</g:mo> <g:mn>3.686</g:mn> <g:mtext> </g:mtext> <g:mtext> </g:mtext> <g:mi>GeV</g:mi> </g:math> by the BESIII detector, we search for the rare electromagnetic Dalitz decays <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"> <i:msub> <i:mi>χ</i:mi> <i:mrow> <i:mi>c</i:mi> <i:mi>J</i:mi> </i:mrow> </i:msub> <i:mo stretchy="false">→</i:mo> <i:msup> <i:mi>e</i:mi> <i:mo>+</i:mo> </i:msup> <i:msup> <i:mi>e</i:mi> <i:mo>−</i:mo> </i:msup> <i:mi>ϕ</i:mi> <i:mo stretchy="false">(</i:mo> <i:mi>J</i:mi> <i:mo>=</i:mo> <i:mn>0</i:mn> <i:mo>,</i:mo> <i:mn>1</i:mn> <i:mo>,</i:mo> <i:mn>2</i:mn> <i:mo stretchy="false">)</i:mo> </i:math> via the radiative transitions <n:math xmlns:n="http://www.w3.org/1998/Math/MathML" display="inline"> <n:mi>ψ</n:mi> <n:mo stretchy="false">(</n:mo> <n:mn>3686</n:mn> <n:mo stretchy="false">)</n:mo> <n:mo stretchy="false">→</n:mo> <n:mi>γ</n:mi> <n:msub> <n:mi>χ</n:mi> <n:mrow> <n:mi>c</n:mi> <n:mi>J</n:mi> </n:mrow> </n:msub> </n:math> . No statistically significant <s:math xmlns:s="http://www.w3.org/1998/Math/MathML" display="inline"> <s:msub> <s:mi>χ</s:mi> <s:mrow> <s:mi>c</s:mi> <s:mi>J</s:mi> </s:mrow> </s:msub> <s:mo stretchy="false">→</s:mo> <s:msup> <s:mi>e</s:mi> <s:mo>+</s:mo> </s:msup> <s:msup> <s:mi>e</s:mi> <s:mo>−</s:mo> </s:msup> <s:mi>ϕ</s:mi> </s:math> signals are observed. The upper limits on the branching fractions of <v:math xmlns:v="http://www.w3.org/1998/Math/MathML" display="inline"> <v:mrow> <v:msub> <v:mrow> <v:mi>χ</v:mi> </v:mrow> <v:mrow> <v:mi>c</v:mi> <v:mi>J</v:mi> </v:mrow> </v:msub> <v:mo stretchy="false">→</v:mo> <v:msup> <v:mrow> <v:mi>e</v:mi> </v:mrow> <v:mrow> <v:mo>+</v:mo> </v:mrow> </v:msup> <v:msup> <v:mrow> <v:mi>e</v:mi> </v:mrow> <v:mrow> <v:mo>−</v:mo> </v:mrow> </v:msup> <v:mi>ϕ</v:mi> <v:mtext> </v:mtext> <v:mo stretchy="false">(</v:mo> <v:mi>J</v:mi> <v:mo>=</v:mo> <v:mn>0</v:mn> <v:mo>,</v:mo> <v:mn>1</v:mn> <v:mo>,</v:mo> <v:mn>2</v:mn> <v:mo stretchy="false">)</v:mo> </v:mrow> </v:math> , excluding the <ab:math xmlns:ab="http://www.w3.org/1998/Math/MathML" display="inline"> <ab:mi>ϕ</ab:mi> </ab:math> resonance to <cb:math xmlns:cb="http://www.w3.org/1998/Math/MathML" display="inline"> <cb:msup> <cb:mi>e</cb:mi> <cb:mo>+</cb:mo> </cb:msup> <cb:msup> <cb:mi>e</cb:mi> <cb:mo>−</cb:mo> </cb:msup> </cb:math> final states, are set to be <eb:math xmlns:eb="http://www.w3.org/1998/Math/MathML" display="inline"> <eb:mn>2.4</eb:mn> <eb:mo>×</eb:mo> <eb:msup> <eb:mn>10</eb:mn> <eb:mrow> <eb:mo>−</eb:mo> <eb:mn>7</eb:mn> </eb:mrow> </eb:msup> <eb:mo>,</eb:mo> <eb:mn>6.7</eb:mn> <eb:mo>×</eb:mo> <eb:msup> <eb:mn>10</eb:mn> <eb:mrow> <eb:mo>−</eb:mo> <eb:mn>7</eb:mn> </eb:mrow> </eb:msup> </eb:math> , and <gb:math xmlns:gb="http://www.w3.org/1998/Math/MathML" display="inline"> <gb:mn>4.1</gb:mn> <gb:mo>×</gb:mo> <gb:msup> <gb:mn>10</gb:mn> <gb:mrow> <gb:mo>−</gb:mo> <gb:mn>7</gb:mn> </gb:mrow> </gb:msup> </gb:math> at the 90% confidence level, respectively. This is the first search for the electromagnetic Dalitz transition of P-wave charmonium <ib:math xmlns:ib="http://www.w3.org/1998/Math/MathML" display="inline"> <ib:msub> <ib:mi>χ</ib:mi> <ib:mrow> <ib:mi>c</ib:mi> <ib:mi>J</ib:mi> </ib:mrow> </ib:msub> </ib:math> states to a light vector meson.

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Journal
Physical review. D/Physical review. D.
Published
2026-02-19
DOI
https://doi.org/10.1103/tg88-k7d4
Primary Topic
Quantum Chromodynamics and Particle Interactions
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article
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article

Search for the electromagnetic Dalitz decays <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msub> <mml:mi>χ</mml:mi> <mml:mrow> <mml:mi>c</mml:mi> <mml:mi>J</mml:mi> </mml:mrow> </mml:msub> <mml:mo stretchy="false">→<

A. Kupść, Angela B. Brueggemann, F. Hanisch, P. Egorov et al.
Physical review. D/Physical review. D.
Quantum Chromodynamics and Particle Interactions
article

Search for the electromagnetic Dalitz decays <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msub> <mml:mi>χ</mml:mi> <mml:mrow> <mml:mi>c</mml:mi> <mml:mi>J</mml:mi> </mml:mrow> </mml:msub> <mml:mo stretchy="false">→<

A. Kupść, Angela B. Brueggemann, F. Hanisch, P. Egorov, Thomas Johansson, A. Bortone, Q. M., Sofia Pacetti, A. Zhemchugov, R. Aliberti, A. Khoukaz, Xi Kui, N. Salone, M. Greco, R. Farinelli, Joshua Jackson, S. Garbolino, A. Sarantsev, Francesca Rosini, W. Kühn, I. Garzia, Y. M., Yury Anatolevich Nefedov, F. Cossio, A. Amoroso, Li P. R., S. Gramigna, A. Dbeyssi, M. Fritsch, A. Limphirat, A. G. Denig, K. Begzsuren, K. Schoenning, P. Adlarson, Z. Wang, Y. Schelhaas, B. Moses, G. Mezzadri, C. Normand, Marina Maggiora, Klaus Peters, Wolfgang Gradl, Stefano Sosio, Nasser Kalantar-Nayestanaki, Olga Bakina, Marco Giovanni Maria Destefanis, Max Lellmann, S. Spataro, V. Prasad, Igor Denysenko, A. Guskov, N. Berger, Alexander Leon Gilman, Frederik Weidner, A. Rivetti, R. L. Lander, B. Kopf, S. Malde, S. Marcello, Qichun Feng, N. Hüsken, Monica Bertani, J. Gutierrez, H.-R. Bao, Yuan Liu, Ke Liu, Yujie Zeng, Jin Zhang, Martin Duy Tat, D. X. Lin, C. F. Qiao, H. M. Hu, X. Zeng, M. C. Du, K. L. Li, X. L. Luo, H. R. Zhang, L. B. Liao, Y. C. Yu, F. A. Harris, L. L. Wang, Y. P. Liao, Z. Y. Deng, W. C. Yan, K. J. Xie, J. F. Sun, C. H. Li, Y. L. Xiao, G. S. Huang, J. Q. Zhou, T. Liu, Y. B. Liu, S. Zhou, T. Lin, X. C. Ai, Z. M. Hu, J. L. Ma, Y. Bai, W. T. Liu, W. D. Li, A. Marshall, X. Y. Chai, J. Rademacker, L. Gong, B. X. Zhang, J. J. Wang, Lei Li, F. H. Heinsius, X. R. Lyu, Z. J. Ye, S. A. Cetin, S. L. Chen, C. Wang, A. Calcaterra, G. Felici, M. X. Luo, S. J. Jiang, S. H. Zhu, S. Qian, Junhao Yin, K. J. Zhu, Y. H. Meng, H. Y. Xu, Z. Wu, Jianyu Zhang, X. B. Ji, S. L. Hu, Y. J. Wu, J. H. Feng, H. X. Yang, R. J. Yang, W. B. Qian, Y. H. Yang, C. J. Tang, Huihui Liu, C. C. Lin, M. Qi, Y. Tian, M. Rolo, N. Yu. Muchnoi, Y. J. Sun, X. S. Kang, J. L. Fu, J. H. Qiao, S. X. Li, Y. T. Feng, M. H. Liu, C. F. Redmer, A. Q. Guo, M. G. Zhao, D. H. Zhang, M. H. Gu, A. A. Zafar, H. P. Peng, L. Q. Qin, W. J. Zheng, J. D. Gong, J. Zu, J. F. Hu, M. H. Ye, S. Plura, S. P. Wen, Y. X. Zhao, Y. Pan, K. Goetzen, W. D. Zhu, Y. H. Xie, Z. G. Zhao, Y. Q. Fang, M. Pelizaeus, G. Y. Hou, Q. Lan, P. B. Qin, H. Xiao, H. N. Li, Y. Jiang, X. R. Zhou, L. Y. Tao, X. H. Xie, H. Miao, Y. C. Zhu, T. T. Han, X. C. Lou, R. P. Guo, K. Y. Liu, G. M. Liu, C. H. Heinz, L. B. Guo, M. Wang, S. S. Sun, Chao Chen, C. Q. Deng, K. X. Huang, B. C. Ke, X. D. Yu, C. Wu, Y. F. Liang, G. Wilkinson, J. J. Qin, L. Yuan, J. X. Teng, I. B. Nikolaev, X. Y. Ma, Z. P. Mao, K. Sun, Z. P. Xie, Lu Liu, J. S. Yu, X. R. Zheng, J. S. Luo, J. B. Jiao, L. Sun, N. Zhao, H. J. Wang, D. M. Li, R. Q. Ma, X. S. Jiang, J. Y. Zhao, X. Y. Zhai, M. Wolke, J. L. Shi, R. Li, S. G. Wu, T. Sun, G. Rong, H. L. Song, T. Lenz, G. Yu, H. Y. Chen, Z. S. Xu, D. Bettoni, X. Shi, Q. L. Niu, Z. Ning, J. Yuan, N. Y. Wang, F. De Mori, W. L. Xu, E. M. Gersabeck, D. Y. Wang, H. Y. Yan, G. Y. Tang, Q. Liu, Y. X. Zhou, H. Yuan, M. H. Liao, T. T. Lei, W. H. Shen, P. C. Jiang, W. Ji, C. Z. Yuan, Z. Q. Liu, H. Zhou, X. X. Ding, S. L. Olsen, H. Shi, M. Berlowski, X. B. Gao, H. Liang, T. Hussain, Cong Wang, R. Y. Zhang, X. T. Hou, X. F. Wang, T. Luo, Z. Y. Zhang, J. J. Cui, M. N. Achasov, H. L. Ma, Q. Y. Zhang, R. Kiuchi, J. B. Liu, Y. Y. Duan, J. Muskalla, H. Cai, D. Dedovich, Y. J. Su, S. Kabana, K. D. Hao, J. G. Lu, R. Y. Ma, T. Yu, T. Y. Li, U. Wiedner, Z. H. Lu, Z. Y. You, G. F. Fan, S. S. Fang, W. Shan, E. Bianco, Z. J. Xiao, Y. C. Xu, C. X. Liu, F. Yan, X. M. Zhang, K. Petridis, Q. P. Ji, M. R. Li, S. K. Choi, Z. K. Jia, T. J. Jiang, Y. Yuan, X. T. Huang, H. F. Shen, X. H. Wu, P. T. Ge, J. F. Chang, M. J. Guo, L. Xia, Y. Jin, X. H. Mo, Z. J. Li, J. Cottee-Meldrum, Y. K. Heng, Wei Wang, X. Pan, C. H. Chen, F. M. Melendi, L. Yan, K. Wang, S. S Su, L. Fava, Q. Ouyang, Z. X. Meng, N. Zhang, F. Bianchi, Y. R. Hou, C. P. Shen, A. N. Zhu, H. Gao, Yi Wang, Lei Zhang, Y. J. Mao, Y. T. Gu, O. B. Kolcu, Ying Yue, H. J. Lu, G. F. Xu, T. J. Wang, T. Ma, L. Zhao, X. J. Peng, F. Stieler, X. Y. Li, X. R. Chen, Z. J. Shang, Y. Ban, X. Chu, X. P. Xu, T. D. Xu, K. L. Han, X. Q. Yan, J. Libby, S. S. Rong, Q. An, J. L. Ping, Q. X. Li, R. P. Zhao, X. Dong, H. L. Dai, Y. P. Guo, F. X. Lu, S. H. Zeng, G. Y. Xiao, C. Q. Feng, K. Y. Shan, G. Y. Zhang, Y. M. Zhang, R. E. Mitchell, H. X. Mao, H. B. Jiang, X. Q. Hao, Y. Z. Che, Y. X. Song, L. Y. Dong, Yaqian Wang, M. C. Yu, L. Q. Lin, Y. H. Zhan, A. Pathak, L. X. Zhu, W. P. Wang, D. Xiao, L. S. Nie, J. Fang, Y. X. Ding, L. C. Liu, S. Nisar, C. Herold, X. K. Liu, Y. P. Huang, X. T. Ma, Lianjie Wu, N. Cao, T. J. Zhu, T. Z. Song, Y. A. Tang, M. H. Cai, J. H. Yang, V. Batozskaya, Y. J. Zeng, J. F. Shangguan, L. J. Li, F. C. Ma, Hui Li, N. Kumar, X. Cai, S. H. Zhang, Z. W. Ge, X. Y. Shen, C. L. Luo, M. Kavatsyuk, F. Feldbauer, P. L. Li, X. Q. Yuan, G. F. Cao, I. Boyko, Y. N. Gao, H. R. Qi, L. Q. Huang, B. M. Zheng, X. Y. Zhuang, I. Uman, F. Nerling, P. C. Hong, Y. H. Fan, R. G. Ping, B. Wang, Z. F. Tian, Q. A. Malik, D. H. Wei, I. MacKay, S. B. Liu, M. Kuessner, Y. P. Li, Ch. Rosner, T. Hu, X. M. Xian, Q. P. Hu, H. K. Sun, Y. D. Wang, Y. H. Lyu, C. X. Yu, C. J. Xu, C. Xie, W. D. Niu, G. Li, H. H. Liu, T. Y. Xing, S. Wang, J. J. Fan, Z. Y. Yuan, B. Zhong, S. Y. Shi, P. Zhang, R. A. Briere, J. Dong, W. N. Lan, C. D. Fu, B. H. Xiang, C. X. Yue, L. F. Tang, Bo Wang, B. J. Liu, M. Q. Ruan, W. M. Song, G. X. Sun, Q. J. Xu, X. P. Qin, S. Jin, Z. K. Chen, H. R. Wei, M. Scodeggio, Y. R. Wen, F. Z. Qi, J. F. Wu, J. Zhu, J. P. Zheng, B. A. Shi, W. H. Tian, F. H. Liu, J. S. Li, L. Q. Yu, T. Yang, B. X. Yu, L. H. Wu, C. Zhong, L. G. Shao, R. E. de Boer, T. J. Min, Z. Y. Lv, K. L. He, F. Li, Y. Y. Peng, S. X. Du, P. L. Liu, Z. L. Wang, Z. H. Qu, C. Geng, Y. H. Lu, S. C. Yuan, Z. Q. Sun, J. J. Song, M. Q. Jing, Y. P. Pei, M. Xu, P. Huang, D. Jiang, M. Y. Dong, Z. L. Hou, M. Shao, Y. Y. Ji, S. J. Zhao, Zh. Zh. Zhang, V. Khachatryan, Z. H. Qin, X. Y. Shan, Feng Liu, L. M. Zhang, G. Cibinetto, X. L. Lu, J. J. Tang, G. Chen, G. Zhao, A. Q. Zhang, C. Y. Guan, B. Ding, J. Y. Tian, Y. Q. Chen, G. R. Liao, J. F. Qiu, G. R. Che, W. X. Gong, W. X. Fang, J. X. Zhang, X. M. Jing, J. P. Dai, Y. W. Fu, M. L. Chen, Z. A. Zhu, Y. Hu, F. E. Maas, Z. Jiao, Q. X. Feng, N. in der Wiesche, Shulei Zhang, T. Chen, Y. H. Zheng, J. H. Zou
article en

Abstract

Using a data sample of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"> <a:mo stretchy="false">(</a:mo> <a:mn>2.712</a:mn> <a:mo>±</a:mo> <a:mn>0.014</a:mn> <a:mo stretchy="false">)</a:mo> <a:mo>×</a:mo> <a:msup> <a:mn>10</a:mn> <a:mn>9</a:mn> </a:msup> <a:mtext> </a:mtext> <a:mtext> </a:mtext> <a:mi>ψ</a:mi> <a:mo stretchy="false">(</a:mo> <a:mn>3686</a:mn> <a:mo stretchy="false">)</a:mo> </a:math> events collected at <g:math xmlns:g="http://www.w3.org/1998/Math/MathML" display="inline"> <g:msqrt> <g:mi>s</g:mi> </g:msqrt> <g:mo>=</g:mo> <g:mn>3.686</g:mn> <g:mtext> </g:mtext> <g:mtext> </g:mtext> <g:mi>GeV</g:mi> </g:math> by the BESIII detector, we search for the rare electromagnetic Dalitz decays <i:math xmlns:i="http://www.w3.org/1998/Math/MathML" display="inline"> <i:msub> <i:mi>χ</i:mi> <i:mrow> <i:mi>c</i:mi> <i:mi>J</i:mi> </i:mrow> </i:msub> <i:mo stretchy="false">→</i:mo> <i:msup> <i:mi>e</i:mi> <i:mo>+</i:mo> </i:msup> <i:msup> <i:mi>e</i:mi> <i:mo>−</i:mo> </i:msup> <i:mi>ϕ</i:mi> <i:mo stretchy="false">(</i:mo> <i:mi>J</i:mi> <i:mo>=</i:mo> <i:mn>0</i:mn> <i:mo>,</i:mo> <i:mn>1</i:mn> <i:mo>,</i:mo> <i:mn>2</i:mn> <i:mo stretchy="false">)</i:mo> </i:math> via the radiative transitions <n:math xmlns:n="http://www.w3.org/1998/Math/MathML" display="inline"> <n:mi>ψ</n:mi> <n:mo stretchy="false">(</n:mo> <n:mn>3686</n:mn> <n:mo stretchy="false">)</n:mo> <n:mo stretchy="false">→</n:mo> <n:mi>γ</n:mi> <n:msub> <n:mi>χ</n:mi> <n:mrow> <n:mi>c</n:mi> <n:mi>J</n:mi> </n:mrow> </n:msub> </n:math> . No statistically significant <s:math xmlns:s="http://www.w3.org/1998/Math/MathML" display="inline"> <s:msub> <s:mi>χ</s:mi> <s:mrow> <s:mi>c</s:mi> <s:mi>J</s:mi> </s:mrow> </s:msub> <s:mo stretchy="false">→</s:mo> <s:msup> <s:mi>e</s:mi> <s:mo>+</s:mo> </s:msup> <s:msup> <s:mi>e</s:mi> <s:mo>−</s:mo> </s:msup> <s:mi>ϕ</s:mi> </s:math> signals are observed. The upper limits on the branching fractions of <v:math xmlns:v="http://www.w3.org/1998/Math/MathML" display="inline"> <v:mrow> <v:msub> <v:mrow> <v:mi>χ</v:mi> </v:mrow> <v:mrow> <v:mi>c</v:mi> <v:mi>J</v:mi> </v:mrow> </v:msub> <v:mo stretchy="false">→</v:mo> <v:msup> <v:mrow> <v:mi>e</v:mi> </v:mrow> <v:mrow> <v:mo>+</v:mo> </v:mrow> </v:msup> <v:msup> <v:mrow> <v:mi>e</v:mi> </v:mrow> <v:mrow> <v:mo>−</v:mo> </v:mrow> </v:msup> <v:mi>ϕ</v:mi> <v:mtext> </v:mtext> <v:mo stretchy="false">(</v:mo> <v:mi>J</v:mi> <v:mo>=</v:mo> <v:mn>0</v:mn> <v:mo>,</v:mo> <v:mn>1</v:mn> <v:mo>,</v:mo> <v:mn>2</v:mn> <v:mo stretchy="false">)</v:mo> </v:mrow> </v:math> , excluding the <ab:math xmlns:ab="http://www.w3.org/1998/Math/MathML" display="inline"> <ab:mi>ϕ</ab:mi> </ab:math> resonance to <cb:math xmlns:cb="http://www.w3.org/1998/Math/MathML" display="inline"> <cb:msup> <cb:mi>e</cb:mi> <cb:mo>+</cb:mo> </cb:msup> <cb:msup> <cb:mi>e</cb:mi> <cb:mo>−</cb:mo> </cb:msup> </cb:math> final states, are set to be <eb:math xmlns:eb="http://www.w3.org/1998/Math/MathML" display="inline"> <eb:mn>2.4</eb:mn> <eb:mo>×</eb:mo> <eb:msup> <eb:mn>10</eb:mn> <eb:mrow> <eb:mo>−</eb:mo> <eb:mn>7</eb:mn> </eb:mrow> </eb:msup> <eb:mo>,</eb:mo> <eb:mn>6.7</eb:mn> <eb:mo>×</eb:mo> <eb:msup> <eb:mn>10</eb:mn> <eb:mrow> <eb:mo>−</eb:mo> <eb:mn>7</eb:mn> </eb:mrow> </eb:msup> </eb:math> , and <gb:math xmlns:gb="http://www.w3.org/1998/Math/MathML" display="inline"> <gb:mn>4.1</gb:mn> <gb:mo>×</gb:mo> <gb:msup> <gb:mn>10</gb:mn> <gb:mrow> <gb:mo>−</gb:mo> <gb:mn>7</gb:mn> </gb:mrow> </gb:msup> </gb:math> at the 90% confidence level, respectively. This is the first search for the electromagnetic Dalitz transition of P-wave charmonium <ib:math xmlns:ib="http://www.w3.org/1998/Math/MathML" display="inline"> <ib:msub> <ib:mi>χ</ib:mi> <ib:mrow> <ib:mi>c</ib:mi> <ib:mi>J</ib:mi> </ib:mrow> </ib:msub> </ib:math> states to a light vector meson.

Physical review. D/Physical review. D.Vol. 113(5)
University of Science and Technology Liaoning (CN), Liaoning University (CN), Università degli Studi del Piemonte Orientale “Amedeo Avogadro” (IT), Uppsala University (SE), University of Science and Technology of China (CN), University of Hawaii System (US), Mongolian Academy of Sciences (MN), Central South University (CN), Guangxi University (CN), Nanjing Normal University (CN), Liaoning Normal University (CN), North China Electric Power University (CN), Shandong University (CN), COMSATS University Islamabad (PK), Hangzhou Normal University (CN), Hunan University (CN), Henan University of Science and Technology (CN), University of Groningen (NL), GSI Helmholtz Centre for Heavy Ion Research (DE), University of the Punjab (PK), Hunan Normal University (CN), Henan University (CN), Shanghai Jiao Tong University (CN), Yantai University (CN), University of Tarapacá (CL), Guangxi University of Science and Technology (CN), South China Normal University (CN), Yunnan University (CN), Jilin University (CN), Johannes Gutenberg University Mainz (DE), Justus-Liebig-Universität Gießen (DE), University of Ferrara (IT), Qufu Normal University (CN), Peking University (CN), Nankai University (CN), University of Münster (DE), Sichuan University (CN), Fudan University (CN), Inner Mongolia University (CN), University of Perugia (IT), Shandong Normal University (CN), University of Manchester (GB), Guangxi Normal University (CN), China University of Geosciences (CN), Huangshan University (CN), Joint Institute for Nuclear Research (RU), University of Jinan (CN), Henan University of Technology (CN), University of Bristol (GB), Wuhan University (CN), Zhengzhou University (CN), University of Oxford (GB), Central China Normal University (CN), National Centre for Nuclear Research (PL), Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT), Helmholtz Institute Mainz (DE), Istinye University (TR), Institute of Modern Physics (CN), Jilin Medical University (CN), Shanxi University of Traditional Chinese Medicine (CN), Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT), Piedmont University (US), Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (IT), University of Chinese Academy of Sciences (CN), Hebei University (CN), Budker Institute of Nuclear Physics (RU), China Center of Advanced Science and Technology (CN), University of Turin (IT), Indiana University (US), Chung-Ang University (KR), Near East University (CY), Carnegie Mellon University (US), Henan Normal University (CN), Zhejiang University (CN), Lanzhou University (CN), Renmin University of China (CN), Suranaree University of Technology (TH), Beihang University (CN), Nanjing University (CN), Ruhr University Bochum (DE), University of South China (CN), Shanxi Normal University (CN), Tsinghua University (CN)
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