Production Mechanism of the Charmed Baryon ?c+

被引：3
作者：
Wang, Weiping [1 ,2 ]
Zhou, Xiaorong [1 ,2 ]
Ferroli, Rinaldo Baldini [3 ]
Huang, Guangshun [1 ,2 ]
机构：
[1] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China
[2] State Key Lab Part Detect & Elect, Hefei 230026, Peoples R China
[3] INFN Lab Nazl Frascati, I-00044 Frascati, Italy
来源：
SYMMETRY-BASEL | 2022年 / 14卷 / 01期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
charmed baryon; form factors; threshold enhancement; charmed baryonium;
D O I：
10.3390/sym14010005
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
As the lightest charmed baryon, precision measurement of the pair production cross section of lambda(+)(c) provides unprecedented experimental information for the investigation of baryon production mechanism. In addition, the extraction of the polar angle distributions of the outgoing lambda(+)(c) in the annihilation of the electron-positron help to determine its electromagnetic form factors, which is currently the unique key to access the internal structure of the baryons. In this article, the measurement of e(+)e(-)& RARR;lambda(+)(c)lambda over bar (-)(c) process via the initial state radiation technique at Belle detector and direct electron-positron annihilation at BESIII with discrete center-of-mass energies near threshold are briefly reviewed. In addition, the electromagnetic form factor ratios of lambda(+)(c) measured by BESIII are also investigated. A few theoretical models that parameterize the center-of-mass energy dependence of the cross section and electromagnetic form factors of baryon are introduced and the contributions of lambda(+)(c) data to them are discussed.
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