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The X(4140) and X(4160) resonances in the e^+e^−→γJ/ψϕ reaction

《中国物理C:英文版》2019年 第11期 | 王恩 谢聚军 耿立升 Eulogio Oset   School of Physics Zhengzhou University Zhengzhou Henan 450001 China 2Institute of Modern Physics Chinese Academy of Sciences Lanzhou 730000 China 3University of Chinese Academy of Sciences Beijing 101408 China 4School of Physics and Nuclear Energy Engineering and International Research Center for Nuclei and Particles in the Cosmos Beihang University Beijing 100191 China 5Departamento de Física Teórica and IFIC Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna Aptdo.22085 46071 Valencia Spain
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摘 要:We investigate the J/ψϕinvariant mass distribution in the e^+e−→γJ/ψϕreaction at a center^-of^-mass energy of s√=4.6 GeV measured by the BESIII collaboration,which concluded that no significant signals were observed for e^+e−→γX(4140)because of the low statistics.We show,however,that the J/ψϕinvariant mass distribution is compatible with the existence of the X(4140)state,appearing as a peak,and a strong cusp structure at the D∗sD-∗s threshold,resulting from the molecular nature of the X(4160)state,which provides a substantial contribution to the reaction.This is consistent with our previous analysis of the B^+→J/ψϕK^+decay measured by the LHCb collaboration.We strongly suggest further measurements of this process with more statistics to clarify the nature of the X(4140)and X(4160)resonances.
【分 类】【数理科学和化学】 > 原子核物理学、高能物理学
【关键词】 X(4140) J=ϕscattering heavy flavor hadrons X(4160)
【出 处】 《中国物理C:英文版》2019年 第11期 11-20页 共10页
【收 录】 中文科技期刊数据库

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