First measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mi mathvariant="normal">Σ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mi>n</mml:mi> <mml:mo>→</mml:mo> <mml:mi mathvariant="normal">Λ</mml:mi>

Using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"> <a:mrow> <a:mrow> <a:mo>(</a:mo> <a:mn>1.0087</a:mn> <a:mo>±</a:mo> <a:mn>0.0044</a:mn> <a:mo>)</a:mo> </a:mrow> <a:mo>×</a:mo> <a:msup> <a:mn>10</a:mn> <a:mn>10</a:mn> </a:msup> </a:mrow> <a:mo> </a:mo> <a:mrow> <a:mi>J</a:mi> <a:mo>/</a:mo> <a:mi>ψ</a:mi> </a:mrow> </a:math> events collected with the BESIII detector at the BEPCII storage ring, the reactions <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"> <b:mrow> <b:msup> <b:mi mathvariant="normal">Σ</b:mi> <b:mo>+</b:mo> </b:msup> <b:mi>n</b:mi> <b:mo>→</b:mo> <b:mi mathvariant="normal">Λ</b:mi> <b:mi>p</b:mi> </b:mrow> </b:math> and <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"> <e:mrow> <e:msup> <e:mi mathvariant="normal">Σ</e:mi> <e:mo>+</e:mo> </e:msup> <e:mi>n</e:mi> <e:mo>→</e:mo> <e:msup> <e:mi mathvariant="normal">Σ</e:mi> <e:mn>0</e:mn> </e:msup> <e:mi>p</e:mi> </e:mrow> </e:math> are studied, where the <h:math xmlns:h="http://www.w3.org/1998/Math/MathML"> <h:msup> <h:mi mathvariant="normal">Σ</h:mi> <h:mo>+</h:mo> </h:msup> </h:math> baryon is produced in the process <j:math xmlns:j="http://www.w3.org/1998/Math/MathML"> <j:mrow> <j:mi>J</j:mi> <j:mo>/</j:mo> <j:mi>ψ</j:mi> <j:mo>→</j:mo> <j:msup> <j:mi mathvariant="normal">Σ</j:mi> <j:mo>+</j:mo> </j:msup> <j:msup> <j:mover accent="true"> <j:mi mathvariant="normal">Σ</j:mi> <j:mo>¯</j:mo> </j:mover> <j:mo>−</j:mo> </j:msup> </j:mrow> </j:math> and the neutron is a component of the <n:math xmlns:n="http://www.w3.org/1998/Math/MathML"> <n:mmultiscripts> <n:mi>Be</n:mi> <n:mprescripts/> <n:none/> <n:mn>9</n:mn> </n:mmultiscripts> <n:mo>,</n:mo> <n:mo> </n:mo> <n:mmultiscripts> <n:mi mathvariant="normal">C</n:mi> <n:mprescripts/> <n:none/> <n:mn>12</n:mn> </n:mmultiscripts> </n:math> , and <p:math xmlns:p="http://www.w3.org/1998/Math/MathML"> <p:mmultiscripts> <p:mi>Au</p:mi> <p:mprescripts/> <p:none/> <p:mn>197</p:mn> </p:mmultiscripts> </p:math> nuclei in the beam pipe. Clear signals of these two reactions are observed for the first time. Their cross sections are measured to be <q:math xmlns:q="http://www.w3.org/1998/Math/MathML"> <q:mrow> <q:mi>σ</q:mi> <q:mrow> <q:mo>(</q:mo> <q:msup> <q:mi mathvariant="normal">Σ</q:mi> <q:mo>+</q:mo> </q:msup> <q:mo>+</q:mo> <q:mmultiscripts> <q:mi>Be</q:mi> <q:mprescripts/> <q:none/> <q:mn>9</q:mn> </q:mmultiscripts> <q:mo>→</q:mo> <q:mi mathvariant="normal">Λ</q:mi> <q:mo>+</q:mo> <q:mi>p</q:mi> <q:mo>+</q:mo> <q:mi>X</q:mi> <q:mo>)</q:mo> </q:mrow> <q:mo>=</q:mo> <q:mrow> <q:mo>(</q:mo> <q:mn>45.2</q:mn> <q:mo>±</q:mo> <q:mn>12</q:mn> <q:mo>.</q:mo> <q:msub> <q:mn>1</q:mn> <q:mi>stat</q:mi> </q:msub> <q:mo>±</q:mo> <q:mn>7</q:mn> <q:mo>.</q:mo> <q:msub> <q:mn>2</q:mn> <q:mi>sys</q:mi> </q:msub> <q:mo>)</q:mo> </q:mrow> </q:mrow> </q:math> mb and <t:math xmlns:t="http://www.w3.org/1998/Math/MathML"> <t:mrow> <t:mi>σ</t:mi> <t:mrow> <t:mo>(</t:mo> <t:msup> <t:mi mathvariant="normal">Σ</t:mi> <t:mo>+</t:mo> </t:msup> <t:mo>+</t:mo> <t:mmultiscripts> <t:mi>Be</t:mi> <t:mprescripts/> <t:none/> <t:mn>9</t:mn> </t:mmultiscripts> <t:mo>→</t:mo> <t:msup> <t:mi mathvariant="normal">Σ</t:mi> <t:mn>0</t:mn> </t:msup> <t:mo>+</t:mo> <t:mi>p</t:mi> <t:mo>+</t:mo> <t:mi>X</t:mi> <t:mo>)</t:mo> </t:mrow> <t:mo>=</t:mo> <t:mrow> <t:mo>(</t:mo> <t:mn>29.8</t:mn> <t:mo>±</t:mo> <t:mn>9</t:mn> <t:mo>.</t:mo> <t:msub> <t:mn>7</t:mn> <t:mi>stat</t:mi> </t:msub> <t:mo>±</t:mo> <t:mn>6</t:mn> <t:mo>.</t:mo> <t:msub> <t:mn>9</t:mn> <t:mi>sys</t:mi> </t:msub> <t:mo>)</t:mo> </t:mrow> </t:mrow> </t:math> mb for a <w:math xmlns:w="http://www.w3.org/1998/Math/MathML"> <w:msup> <w:mi mathvariant="normal">Σ</w:mi> <w:mo>+</w:mo> </w:msup> </w:math> average momentum of <y:math xmlns:y="http://www.w3.org/1998/Math/MathML"> <y:mrow> <y:mn>0.992</y:mn> <y:mspace width="0.28em"/> <y:mi>GeV</y:mi> <y:mo>/</y:mo> <y:mi>c</y:mi> </y:mrow> </y:math> , within a range of <ab:math xmlns:ab="http://www.w3.org/1998/Math/MathML"> <ab:mrow> <ab:mo>±</ab:mo> <ab:mn>0.015</ab:mn> <ab:mspace width="0.28em"/> <ab:mi>GeV</ab:mi> <ab:mo>/</ab:mo> <ab:mi>c</ab:mi> </ab:mrow> </ab:math> , where <cb:math xmlns:cb="http://www.w3.org/1998/Math/MathML"> <cb:mi>X</cb:mi> </cb:math> represents the residual nucleus. This is the first study of <db:math xmlns:db="http://www.w3.o

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Journal
Physical review. C
Published
2026-01-07
DOI
https://doi.org/10.1103/nzzh-4f6y
Primary Topic
Particle Accelerators and Free-Electron Lasers
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article
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article

First measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mi mathvariant="normal">Σ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mi>n</mml:mi> <mml:mo>→</mml:mo> <mml:mi mathvariant="normal">Λ</mml:mi>

X. Y. Liu, A. Limphirat, Y. Zhu, W. Shan et al.
Physical review. C
Particle Accelerators and Free-Electron Lasers
article

First measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mi mathvariant="normal">Σ</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mi>n</mml:mi> <mml:mo>→</mml:mo> <mml:mi mathvariant="normal">Λ</mml:mi>

X. Y. Liu, A. Limphirat, Y. Zhu, W. Shan, X. R. Lyu, O. Bakina, L. X. Zhu, Q. M. Li, J. R. Li, H. N. Li, D. Bettoni, M. Destefanis, P. L. Li, K. Begzsuren, Z. C. Zhou, J. J. Zhang, T. Hussain, Z. Y. Yuan, X. B. Gao, S. B. Liu, H. L., X. L. Kang, J. Dong, Z. A. Zhu, Z. Y. Lv, S. P. Wen, Y. A. Tang, J. H. Feng, J. K. Jiao, W. B. Qian, T. Ma, K. Wang, Xi‐Cheng Ai, A. Calcaterra, S. Marcello, X. J. Wang, S. S. Sun, Y. C. Xu, K. J. Zhu, V. Khachatryan, F. De Mori, J. F. Hu, J. J. Qin, D. M. Li, R. P. Zhao, H. Cai, S. Spataro, H. C. Zhang, C. H. Heinz, Y. H. Fan, L. Gong, M. Greco, A. Brueggemann, L. Fava, S. Garbolino, Bo Wang, A. Pathak, Boyang Ding, S. S. Rong, X. S. Jiang, T. Holtmann, X. Chu, Y. H. Wang, X. R. Zheng, Q. L. Niu, D. H. Zhang, Z. D. Zhang, N. Yu. Muchnoi, F. Hanisch, J. J. Fan, H. J. Wang, Y. H. Zheng, Yaqian Wang, Z. J. Xiao, Zihao Zhang, L. Yan, S. L. Hu, F. E. Maas, N. Berger, G. Wilkinson, C. J. Tang, Q. Y. Zhang, D. Dedovich, B. Zheng, L. Y. Tao, X. F. Wang, B. A. Shi, S. Sosio, H. Miao, H. L. Yang, G. F. Cao, W. D. Niu, G. X. Sun, Y. Y. Ji, X. P. Qin, C. P. Shen, Minghui Du, X. B. Ji, W. X. Gong, F. Li, J. Y. Shi, Yaliang Zhao, W. M. Song, G. Y. Tang, D. Y. Wang, Weiwei Zhu, P. Egorov, Z. S. Xu, Y. H. Meng, Xin-Nian Wang, J. F. Qiu, X. S. Kang, X. T. Hou, V. Batozskaya, M. N. Achasov, H. K. Sun, X. Y. Shan, J. L. Ma, Y. F. Lyu, Z. K. Chen, Y. S. Huang, Cheng-Kui Li, Z. L. Hou, F. M. Melendi, Mengfei Zhao, S. Kabana, Jian Ping Gong, Minghui Cai, Yanhua Lu, Y. B. Chen, Zi-Han Ge, S. S. Fang, Y. C. Xu, Z. Ning, H. Y. Zhang, C. Q. Deng, Y. K. Heng, Y. Y. Peng, F. Feldbauer, G. Y. Xiao, M. Kuessner, H. Q. Zhang, H. L. Dai, XY Zhang, X. Dong, Y. T. Feng, Y. G. Li, Z. J. Li, J. X. Zhang, X. D. Yu, J. G. Messchendorp, G. F. Xu, S. Pacetti, C. Liu, T. Wang, W. H. Shen, Suowei Wu, J. P. Zheng, Y. T. Zhang, A. Bortone, J. Muskalla, G. Y. Hou, W. Gradl, M. Berlowski, Hui Li, Y. G. Xie, X. N. Wang, Ziqi Sun, F. De Mori, T. J. Min, F. X. Lu, C. X. Liu, J. Y. Zhang, Y. Zeng, F. Z. Qi, B. Zhong, A. Kupsc, J. Y. Zhao, J. Q. Zhang, C. H. Li, Y. Ding, R. Aliberti, L. J Li, J. J. Cui, J. W. Zhang, E. Bianco, H. L. Song, J. L. Qin, H. R. Qi, X. Z. Li, A. Gilman, X. Li, K. K. He, D. H. Wei, Xilei Sun, W. T. Liu, I. Boyko, X. H. Mo, Ying Sun, T. Yu, W. K. Liu, T. Liu, X. M. Jing, Jialin Zou, T. Johansson, P. R. Li, K. J. Xie, A. Zhemchugov, W. J. Zheng, M. Lellmann, L. H. Wu, T. J. Zhu, Ping Huang, M. R. Li, H. X. Yang, H. Gao, S. Qian, K. Y. Liu, Y. Hu, T. T. Han, H. H. Liu, P. Zhang, Yunyi Yang, F. C. Ma, J. Libby, J. L. Zhang, Κ. Peters, X. T. Chen, B. X. Yu, X. H. Li, J. F. Hu, Z. A. Liu, A. Khoukaz, N. Salone, S. H. Zhang, M. H. Gu, I. Mackay, K. Y. Shan, J. F. Sun, Z. M. Hu, E. Gersabeck, F. A. Harris, A. Sarantsev, W. X. Fang, Y. B. Zhao, Q. J. Xu, W. J. Zhu, M. Y. Dong, Francesca Rosini, P. L. Liu, J. Tang, X. L. Wang, Q. P. Ji, G. B. Sun, H. M. Liu, Z. X. Meng, D. X. Lin, Z. L. Zhang, Gang Zhao, W. M. Liu, Zh. Zh. Zhang, L. B. Guo, K. Goetzen, Y. P. Huang, Ruhui Li, Chao Chen, M. J. Guo, C. Z. Yuan, Y. N. Wang, J. R. Luo, J. B. Jiao, C. Wu, L. Q. Huang, S. C. Yuan, C. F. Qiao, Y. Schelhaas, C. Geng, X. Lou, Z. Y. Deng, K. D. Hao, Z. Q. Wang, J. P. Dai, X. Y. Zhou, G. R. Liao, M. Maggiora, Yang Yu, Y. J. Mao, F. H. Heinsius, K. L. He, X. X. Ding, M. L. Chen, G. Chen, J. Z. Zhang, X. T. Huang, S. J. Chen, T. Z. Song, C. Q. Feng, P. C. Hong, S. L. Olsen, W. D. Li, R. Kiuchi, J. J. Liu, Yu Bai, R. E. Mitchell, V. Prasad, Y. H. Zhang, S. A. Cetin, Q. P. Ji, M. Ye, R. E. de Boer, X. Shi, G. Mezzadri, Z. Wang, Tao Sun, K. Liu, T. Y. Xing, I. Uman, X. Liu, Z. Wang, I. Garzia, G. M. Liu, H. J. Li, B. J. Liu, Z. H. Qin, L. L. Ma, J. L. Ping, Z. Z. Zhang, G. Chelkov, Yu Liu, Yanjing Su, J. H. Yang, Lu Liu, F. Stieler, X. M. Zhang, O. B. Kolcu, F. Cossio, J. Zhao, K. X. Huang, Qingming Zhang, K. Sun, Y. F. Wang, J. S. Li, M. Pelizaeus, Y. F. Yang, X. Y. Shen, S. Gramigna, S. Janchiv, Xiaohong Wu, Z. F. Tian, C. X. Yue, L. W. Wang, X. Y. Ma, Chun‐Fang Xu, J. J. Song, X. H. Xie, J. Y. Tian, Y. F. Wang, C. X. Lin, L. G. Shao, M. H. Ye, G. Yu, Yu Fu, S. Plura, X. Cai, R. P. Guo, P. Adlarson, W. C. Yan, Xiaoying Zhuang, K. Schöenning, Y. X. Zhao, Di Xiao, R. Q. Ma, H. B. Liu, G. Rong, W. H. Tian, S. L. Chen, Z. J. Chen, M. H. Li, S. H. Zhu, A. Dbeyssi, A. A. Zafar, M. Q. Ruan, X. Pan, A. Denig, Y. B. Liu, M. Fritsch, T. J. Jiang, Nannan Zhang, H. Zhang, Y. Z. Zhou, U. Wiedner, L. Y. Dong, H. L. Ma, S. M. Chen, Y. Jiang, W. G. Li, L. M. Zhang, X. Y. Zhang, H. Y. Chen, G. S. Huang, J. Q. Zhou, Q. An, Y. Q. Chen, W. P. Yan, M. Scodeggio, M. Bertani, A. Rivetti, A. Q. Zhang, A. Amoroso, F. Nerling, Zhidan Liu, Y. X. Song, Ming Tang, J. F. Wu, G. R. Che, Z. J. Shang, Yue Wu, X. Zeng, C. Xie, F. H. Liu, Z. H. Duan, R. Farinelli, Y. Tian, C. F. Redmer, G. Felici, C. Herold, L. J. Wu, G. Li, Y. L. Xiao, J. G. Lu, X. R. Chen, I. Denysenko, Y. D. Wang, M. Rolo, J. B. Liu, Y. Q. Wang, Y. Jin, Z. P. Mao, Z. H. Zhang, B. C. Ke, Y. F. Liang, T. T. Lei, T. Lenz, N. Y. Wang, Xiangyang Li, Y. R. Wen, J. F. Shangguan, Y. T. Liang, R. G. Ping, C. J. Xu, W. P. Wang, Z. H. Qu, I. B. Nikolaev, P. C. Jiang, F. Weidner, Yilin Wang, P. B. Qin, J. L. Shi, J. S. Yu, S. N. Ruan, J. H. Yin, S. H. Zeng, S. K. Choi, B. L. Zhang, Z. Y. Li, Z. Y. You, M. Q. Jing, Keli Han, J. Jackson, X. S. Qin, G. Cibinetto, Y. Lu, T. Chen, J. S. Zhang, Q. Ouyang, Zhun Lü, F. Bianchi, A. Guskov, Z. P. Xie, L. J. Li, J. F. Chang, H. R. Wei, P. T. Ge, N. Cao, Huiying Sun, Z. Jiao, T. J. Wang, Jingya Zhu, B. Kopf, R. Y. Zhang, Weidong D. Zhu, H. H. Zhang, Yifan Yang, B. X. Zhang, L. Q. Qin, S. J. Zhao, N. in der Wiesche, B. Moses, Lu Liu, Q. X. Li, H. Liang, K. L. Li, Yupeng Li, Chi Wang, Ke Li, Yuan Wang, Lei Zhao, H. J. Yang, Tianyu Li, Y. Lin, Cong Wang, Chao Chen, Feng Liu, Hui Li, Junjun Wang, Hongrui Zhang, Xiao-Gang He, Yang Gao, L. Xu, J. Zhou, S. M. Wu, Di Jiang, Lei Zhang, Huihui Liu, K. S. Zhu, C. Li, L. Kumar, Yongping Li, Zhiqing Liu, J. S. Luo, Y. Yang, Hui Yan, Shijie Wang, Qing Lan, X. Liu, X. Zhong, Lianjie Wu, X. L. Li, H. F. Shen, Kai Zhu, Huiyan Xu, S. Y. Shi, N. Zhao, Gaofeng Fan, X. Y. Chai, L. S. Nie, X. T. Ma, S. X. Du, Yuxuan Yang, Yang Lu, Y. C. Sun, C. Chen, Y. T. Gu, C. L. Luo, A. N. Zhu, Lin Li, H. Yuan, S. Nisar, Y. X. Ding, M. Wolke, Q. P. Hu, C. Y. Guan, B. Y. Hu, B. H. Xiang, R. J. Yang, X. Zhou, H. C. Shi, M. X. Luo, Y. Yuan, Y. Y. Duan, Y. Gao, Y. Z. Sun, Y. J. Sun, S. Su, L. Y. Qin, C. C. Lin, Q. N. Xu, Y. Fang, X. Wu, Y. Che, M. C. Yu, X. P. Xu, Z. Wu, S. Malde, S. Chen, C. X. Yu, H. J. Lu, C. D. Fu, Shulei Zhang, Ch. Rosner, Z. G. Zhao, Y. P. Guo, Y. Ban, W. Ji, T. Yang, M. Shao, Ziyi Wang, H. Peng, M. Kavatsyuk, W. B. Yan, H. Zhou, R. A. Briere, N. Hüsken, BESIII Collaboration, Y. Nefedov, M. D. Tat, Shan Jin, Feng Liu, Huihui Liu, Yue Pan, Z. Jiao, B. Liu, Lixing Zhu, Yuehong Xie, N. Kalantar-Nayestanaki, Y. H. Lyu, J. H. Qiao, M. H. Liao, X. L. Ji, Y. M. Zhang, Ximin Zhai, A. Q. Guo, Ling Liao, L. F. Tang, M. Qi, X. Q. Hao, J. X. Teng, S. H. Zhou, L. Yuan, W. N. Lan, X. M. Xian, L. Xia, S. J. Jiang, Z. T. Sun, L. R. Ma, B. M. Zheng, T. Luo, X. Kui, Y. P. Liao, Y. H. Zhan, R. Y. Ma, Y. P. Pei, H. B. Jiang, X. Q. Yan, J. Gutierrez, Q. M. Ma, Y. R. Hou, X. L. Luo, Jianyu Zhang, H. -R. Bao, W. Kühn, J. Fu, X. Zhou, C. Liang, Weiwei Xu, Ying Yue, Lu Liu, Yue Ma, Meng Wang
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Abstract

Using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"> <a:mrow> <a:mrow> <a:mo>(</a:mo> <a:mn>1.0087</a:mn> <a:mo>±</a:mo> <a:mn>0.0044</a:mn> <a:mo>)</a:mo> </a:mrow> <a:mo>×</a:mo> <a:msup> <a:mn>10</a:mn> <a:mn>10</a:mn> </a:msup> </a:mrow> <a:mo> </a:mo> <a:mrow> <a:mi>J</a:mi> <a:mo>/</a:mo> <a:mi>ψ</a:mi> </a:mrow> </a:math> events collected with the BESIII detector at the BEPCII storage ring, the reactions <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"> <b:mrow> <b:msup> <b:mi mathvariant="normal">Σ</b:mi> <b:mo>+</b:mo> </b:msup> <b:mi>n</b:mi> <b:mo>→</b:mo> <b:mi mathvariant="normal">Λ</b:mi> <b:mi>p</b:mi> </b:mrow> </b:math> and <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"> <e:mrow> <e:msup> <e:mi mathvariant="normal">Σ</e:mi> <e:mo>+</e:mo> </e:msup> <e:mi>n</e:mi> <e:mo>→</e:mo> <e:msup> <e:mi mathvariant="normal">Σ</e:mi> <e:mn>0</e:mn> </e:msup> <e:mi>p</e:mi> </e:mrow> </e:math> are studied, where the <h:math xmlns:h="http://www.w3.org/1998/Math/MathML"> <h:msup> <h:mi mathvariant="normal">Σ</h:mi> <h:mo>+</h:mo> </h:msup> </h:math> baryon is produced in the process <j:math xmlns:j="http://www.w3.org/1998/Math/MathML"> <j:mrow> <j:mi>J</j:mi> <j:mo>/</j:mo> <j:mi>ψ</j:mi> <j:mo>→</j:mo> <j:msup> <j:mi mathvariant="normal">Σ</j:mi> <j:mo>+</j:mo> </j:msup> <j:msup> <j:mover accent="true"> <j:mi mathvariant="normal">Σ</j:mi> <j:mo>¯</j:mo> </j:mover> <j:mo>−</j:mo> </j:msup> </j:mrow> </j:math> and the neutron is a component of the <n:math xmlns:n="http://www.w3.org/1998/Math/MathML"> <n:mmultiscripts> <n:mi>Be</n:mi> <n:mprescripts/> <n:none/> <n:mn>9</n:mn> </n:mmultiscripts> <n:mo>,</n:mo> <n:mo> </n:mo> <n:mmultiscripts> <n:mi mathvariant="normal">C</n:mi> <n:mprescripts/> <n:none/> <n:mn>12</n:mn> </n:mmultiscripts> </n:math> , and <p:math xmlns:p="http://www.w3.org/1998/Math/MathML"> <p:mmultiscripts> <p:mi>Au</p:mi> <p:mprescripts/> <p:none/> <p:mn>197</p:mn> </p:mmultiscripts> </p:math> nuclei in the beam pipe. Clear signals of these two reactions are observed for the first time. Their cross sections are measured to be <q:math xmlns:q="http://www.w3.org/1998/Math/MathML"> <q:mrow> <q:mi>σ</q:mi> <q:mrow> <q:mo>(</q:mo> <q:msup> <q:mi mathvariant="normal">Σ</q:mi> <q:mo>+</q:mo> </q:msup> <q:mo>+</q:mo> <q:mmultiscripts> <q:mi>Be</q:mi> <q:mprescripts/> <q:none/> <q:mn>9</q:mn> </q:mmultiscripts> <q:mo>→</q:mo> <q:mi mathvariant="normal">Λ</q:mi> <q:mo>+</q:mo> <q:mi>p</q:mi> <q:mo>+</q:mo> <q:mi>X</q:mi> <q:mo>)</q:mo> </q:mrow> <q:mo>=</q:mo> <q:mrow> <q:mo>(</q:mo> <q:mn>45.2</q:mn> <q:mo>±</q:mo> <q:mn>12</q:mn> <q:mo>.</q:mo> <q:msub> <q:mn>1</q:mn> <q:mi>stat</q:mi> </q:msub> <q:mo>±</q:mo> <q:mn>7</q:mn> <q:mo>.</q:mo> <q:msub> <q:mn>2</q:mn> <q:mi>sys</q:mi> </q:msub> <q:mo>)</q:mo> </q:mrow> </q:mrow> </q:math> mb and <t:math xmlns:t="http://www.w3.org/1998/Math/MathML"> <t:mrow> <t:mi>σ</t:mi> <t:mrow> <t:mo>(</t:mo> <t:msup> <t:mi mathvariant="normal">Σ</t:mi> <t:mo>+</t:mo> </t:msup> <t:mo>+</t:mo> <t:mmultiscripts> <t:mi>Be</t:mi> <t:mprescripts/> <t:none/> <t:mn>9</t:mn> </t:mmultiscripts> <t:mo>→</t:mo> <t:msup> <t:mi mathvariant="normal">Σ</t:mi> <t:mn>0</t:mn> </t:msup> <t:mo>+</t:mo> <t:mi>p</t:mi> <t:mo>+</t:mo> <t:mi>X</t:mi> <t:mo>)</t:mo> </t:mrow> <t:mo>=</t:mo> <t:mrow> <t:mo>(</t:mo> <t:mn>29.8</t:mn> <t:mo>±</t:mo> <t:mn>9</t:mn> <t:mo>.</t:mo> <t:msub> <t:mn>7</t:mn> <t:mi>stat</t:mi> </t:msub> <t:mo>±</t:mo> <t:mn>6</t:mn> <t:mo>.</t:mo> <t:msub> <t:mn>9</t:mn> <t:mi>sys</t:mi> </t:msub> <t:mo>)</t:mo> </t:mrow> </t:mrow> </t:math> mb for a <w:math xmlns:w="http://www.w3.org/1998/Math/MathML"> <w:msup> <w:mi mathvariant="normal">Σ</w:mi> <w:mo>+</w:mo> </w:msup> </w:math> average momentum of <y:math xmlns:y="http://www.w3.org/1998/Math/MathML"> <y:mrow> <y:mn>0.992</y:mn> <y:mspace width="0.28em"/> <y:mi>GeV</y:mi> <y:mo>/</y:mo> <y:mi>c</y:mi> </y:mrow> </y:math> , within a range of <ab:math xmlns:ab="http://www.w3.org/1998/Math/MathML"> <ab:mrow> <ab:mo>±</ab:mo> <ab:mn>0.015</ab:mn> <ab:mspace width="0.28em"/> <ab:mi>GeV</ab:mi> <ab:mo>/</ab:mo> <ab:mi>c</ab:mi> </ab:mrow> </ab:math> , where <cb:math xmlns:cb="http://www.w3.org/1998/Math/MathML"> <cb:mi>X</cb:mi> </cb:math> represents the residual nucleus. This is the first study of <db:math xmlns:db="http://www.w3.o

Physical review. CVol. 113(3)
University of Science and Technology Liaoning (CN), Liaoning University (CN), Uppsala University (SE), University of Science and Technology of China (CN), University of Hawaii System (US), 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), South China Normal University (CN), Yunnan University (CN), Jilin University (CN), Johannes Gutenberg University Mainz (DE), Justus-Liebig-Universität Gießen (DE), Qufu Normal University (CN), Peking University (CN), Nankai University (CN), University of Münster (DE), Sichuan University (CN), Indian Institute of Technology Madras (IN), Fudan University (CN), Inner Mongolia University (CN), 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), 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), 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), 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)
U.S. Department of Energy, National Research Foundation, Deutsche Forschungsgemeinschaft, Swedish Foundation for International Cooperation in Research and Higher Education, National Natural Science Foundation of China, Chinese Academy of Sciences, National Research Foundation of Korea, Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, Istituto Nazionale di Fisica Nucleare, CAS Center for Excellence in Particle Physics, Shanghai Key Laboratory for Particle Physics and Cosmology, Agencia Nacional de Investigación y Desarrollo
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Particle Accelerators and Free-Electron Lasers
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