Identifying the contribution of higher ? mesons around 2 GeV in the e+ e- ? ??0 and e+ e- ? ??' processes

被引：6
|
作者：
Zhou, Qin-Song [1 ,2 ,3 ]
Wang, Jun-Zhang [1 ,2 ,3 ]
Liu, Xiang [1 ,2 ,3 ,4 ,5 ,6 ,7 ]
Matsuki, Takayuki [8 ]
机构：
[1] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Res Ctr Hadron & CSR Phys, Lanzhou 730000, Peoples R China
[3] Inst Modern Phys CAS, Lanzhou 730000, Peoples R China
[4] Lanzhou Univ, Lanzhou Ctr Theoret Phys, Key Lab Theoret Phys Gansu Prov, Lanzhou 730000, Peoples R China
[5] Lanzhou Univ, Frontiers Sci Ctr Rare Isotopes, Lanzhou 730000, Peoples R China
[6] Lanzhou Univ, Joint Res Ctr Phys, Xining 810000, Peoples R China
[7] Qinghai Normal Univ, Xining 810000, Peoples R China
[8] Tokyo Kasei Univ, Itabashi Ku, 1-18-1 Kaga, Tokyo 1738602, Japan
来源：
PHYSICAL REVIEW D | 2022年 / 105卷 / 07期
基金：
中国国家自然科学基金;
关键词：
NARROW DIP STRUCTURE; VECTOR-MESONS; 1.9 GEV/C(2); PHOTOPRODUCTION; VMD;
D O I：
10.1103/PhysRevD.105.074035
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The properties of the light vector meson states around 2.0 GeV have been poorly understood for a long time, which has become a barrier to the expansion to higher light vector meson spectrum. Recently, the BESIII collaboration released the measurements of the e??e??? ??? ????0 and e??e??? ??? ????0 reactions above 2.0 GeV, both of which are ideal processes to study the isovector ?? meson family. In this work, through carrying out a combined analysis of the Born cross section data for the above two processes with the theoretical support on mass spectrum, and production and strong decay behaviors of the ?? meson family around 2.0 GeV, we identify the enhancement structure near 2034 MeV observed in e??e??? ??? ????0 to be the interference contribution from two resonances ????1900?? and ????2150??, and another enhancement structure at 2111 MeV reported in e??e??? ??? ????0 to be the contributions from ????2000?? and ????2150??. This conclusion means that the e??e??? ??? ????0 and e??e??? ??? ????0 are the excellent golden channels to establish ????1900?? and ????2000??, especially for a D-wave state ????2000??, whose experimental search in the e??e??? collision should be quite challenging. The relevant cross section measurements with higher precision are expected in the future BESIII and Belle II experiments.
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页数：10
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