e+e-→Λc+Λc- Cross Sections and the Λc+ Electromagnetic Form Factors within the Extended Vector Meson Dominance Model

被引：4

作者：

Chen, Cheng ^{[1
,2
]}

Yan, Bing ^{[1
,3
]}

Xie, Ju-Jun ^{[1
,2
,4
]}

机构：

[1] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[2] Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 101408, Peoples R China

[3] Chengdu Univ Technol, Coll Math & Phys, Chengdu 610059, Peoples R China

[4] Chinese Acad Sci, Inst Modern Phys, Southern Ctr Nucl Sci Theory SCNT, Huizhou 516000, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2024年 / 41卷 / 02期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

EXCLUSIVE PROCESSES; E(+)E(-);

D O I：

10.1088/0256-307X/41/2/021302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Within the extended vector meson dominance model, we investigate the e(+)e(-)->Lambda(c)+Lambda b(c)(-) reaction and the electromagnetic form factors of the charmed baryon Lambda(+)(c) . The model parameters are determined by fitting them to the cross sections of the process e(+)e(-)->Lambda(+)(c)Lambda(- )(c)and the magnetic form factor |G (M)| of Lambda(+)(c) . By considering four charmonium-like states, called psi(4500), psi(4660), psi(4790), and psi(4900), we can well describe the current data on the e(+)e(-)->Lambda(+)(c)Lambda(-)( c) reaction from the reaction threshold up to 4.96 GeV. In addition to the total cross sections and |G (M)|, the ratio |G (E)/G( M)| and the effective form factor |G e(ff)| for Lambda(+)(c) are also calculated, and found that these calculations are consistent with the experimental data. Within the fitted model parameters, we have also estimated the charge radius of the charmed Lambda(+)(c) baryon.

引用

页数：6

共 47 条

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