Phenomenological study on the decay widths of &Upsilon;(nS)&rarr;d*(2380)+X*

Chao-Yi L&uuml;; P. Wang; Y. B. Dong; P. N. Shen; Z. Y. Zhang; D. M. Li

doi:10.1088/1674-1137/42/6/064102

Chinese Physics C> 2018, Vol. 42> Issue(6) : 064102 DOI: 10.1088/1674-1137/42/6/064102

Phenomenological study on the decay widths of Υ(nS)→d^(2380)+X^

Chao-Yi Lü ^1,2 ,
P. Wang ^2,3 ,
Y. B. Dong ^2,3 ,
P. N. Shen ^2,3 ,
Z. Y. Zhang ^2,3 ,
D. M. Li ¹

Department of Physics, Zhengzhou University, Zhengzhou, Henan 450001, China;
2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
3. Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China

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Abstract：
The decay widths of Υ(nS)→d^*(2380)+X with n=1,2,3 are studied in a phenomenological way. With the help of crossing symmetry, the decay widths are obtained by investigating the imaginary part of the forward scattering amplitudes between d^* and Υ(nS). The wave functions of m d^* and deuteron obtained in previous studies are used for calculating the amplitude. The interaction between d^* (d) and Υ is governed by the quark-meson interaction, where the coupling constant is determined by fitting the observed widths of Υ(nS)→d+X. The numerical results show that the decay widths of Υ(nS)→d^*+X are about 2-10 times smaller than that of d+X. The calculated momentum of d^* is in the range 0.3-0.8 GeV. Therefore, it is very likely that one can find d^*(2380) in these semi-inclusive decay processes.
- Upsilon decay ,
- SU(3) chiral quark model ,
- d*(2380) production

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Chao-Yi Lü, P. Wang, Y. B. Dong, P. N. Shen, Z. Y. Zhang and D. M. Li. Phenomenological study on the decay widths of Υ(nS)→d^*(2380)+X^*[J]. Chinese Physics C, 2018, 42(6): 064102. doi: 10.1088/1674-1137/42/6/064102

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Received: 2018-03-22

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Supported by National Natural Sciences Foundations of China (11475186, 11475192, 11521505, 11565007), the Sino-German CRC 110 Symmetries and the Emergence of Structure in QCD project by NSFC (11621131001), the Key Research Program of Frontier Sciences, CAS, (Y7292610K1) and the IHEP Innovation Fund (Y4545190Y2)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Phenomenological study on the decay widths of Υ(nS)→d^*(2380)+X^*

Department of Physics, Zhengzhou University, Zhengzhou, Henan 450001, China;
2. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
3. Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2018-03-22

Available Online: 2018-06-05

Fund Project: Supported by National Natural Sciences Foundations of China (11475186, 11475192, 11521505, 11565007), the Sino-German CRC 110 Symmetries and the Emergence of Structure in QCD project by NSFC (11621131001), the Key Research Program of Frontier Sciences, CAS, (Y7292610K1) and the IHEP Innovation Fund (Y4545190Y2)

Abstract: The decay widths of Υ(nS)→d^*(2380)+X with n=1,2,3 are studied in a phenomenological way. With the help of crossing symmetry, the decay widths are obtained by investigating the imaginary part of the forward scattering amplitudes between d^* and Υ(nS). The wave functions of m d^* and deuteron obtained in previous studies are used for calculating the amplitude. The interaction between d^* (d) and Υ is governed by the quark-meson interaction, where the coupling constant is determined by fitting the observed widths of Υ(nS)→d+X. The numerical results show that the decay widths of Υ(nS)→d^*+X are about 2-10 times smaller than that of d+X. The calculated momentum of d^* is in the range 0.3-0.8 GeV. Therefore, it is very likely that one can find d^*(2380) in these semi-inclusive decay processes.

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Phenomenological study on the decay widths of Υ(nS)→d^(2380)+X^

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