Using X(3823)→J/ψπ+π− to identify coupled-channel effects

doi:10.1007/s11467-016-0564-7

Frontiers of Physics

2016, Vol. 11

Issue (3): 111402 https://doi.org/10.1007/s11467-016-0564-7

本期目录

Using X(3823)→J/ψπ⁺π⁻ to identify coupled-channel effects

Bo Wang^1,^2,^*(

),Hao Xu^1,^2,^*(

),Xiang Liu^1,^2,^*(

),Dian-Yong Chen^1,^3,^*(

),Susana Coito^3,^*(

),Estia Eichten^4,^*(

)

¹. Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000, China
². School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
³. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
⁴. Theoretical Physics Department, Fermilab, IL 60510, USA

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Abstract：

Very recently, the Belle and BESIII experiments observed a new charmonium-like state X(3823), which is a good candidate for the D-wave charmonium ψ(1³D₂). Because the X(3823) is just near the D ¯D^∗ threshold, the decay X(3823)→ J/ψπ⁺π⁻ can be a golden channel to test the significance of coupled-channel effects. In this work, this decay is considered including both the hidden-charm dipion and the usual quantum chromodynamics multipole expansion (QCDME) contributions. The partial decay width, the dipion invariant mass spectrum distribution dΓ[X(3823) → J/ψπ⁺π⁻]/dm_π⁺_π⁻, and the corresponding dΓ[X(3823) → J/ψπ⁺π⁻]/d cos θ distribution are computed. Many parameters are determined from existing experimental data, so the results depend mainly only on one unknown phase between the QCDME and hidden-charm dipion amplitudes.

Key words： charmonium Hidden-charm dipion decay

收稿日期: 2015-11-26 出版日期: 2016-06-08

Corresponding Author(s): Bo Wang,Hao Xu,Xiang Liu,Dian-Yong Chen,Susana Coito,Estia Eichten

引用本文:

. [J]. Frontiers of Physics, 2016, 11(3): 111402.
Bo Wang,Hao Xu,Xiang Liu,Dian-Yong Chen,Susana Coito,Estia Eichten. Using X(3823)→J/ψπ⁺π⁻ to identify coupled-channel effects. Front. Phys. , 2016, 11(3): 111402.

链接本文:

https://academic.hep.com.cn/fop/CN/10.1007/s11467-016-0564-7
https://academic.hep.com.cn/fop/CN/Y2016/V11/I3/111402

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