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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陈诚
闫冰
谢聚军
Chinese Physics Letters, 2024, (02) : 41 - 46
[2] Combined fit to the cross-sections of e+e- → π+π-ψ(3686) and e+e- → Λc+Λc-
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Yuan, Limin
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[3] Measurements of Born cross sections for e + e -→Λc+ Λc-<overline> (2595) - + c.c. and e + e -→Λc+ Λc-<overline> (2625)- + c.c. at √s=4918.0 and 4950.9 MeV
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Achasov, M. N.
Adlarson, P.
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Aliberti, R.
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Bakina, O.
Balossino, I.
Ban, Y.
Bao, H. -R.
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Begzsuren, K.
Berger, N.
Berlowski, M.
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Chen, H. S.
Chen, M. L.
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PHYSICAL REVIEW D, 2024, 109 (07)
[4] Measurement of the Michel parameters and the average c neutrino helicity from c decays in e+e- c+ c-
Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 377 (04):
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Wan, Junyao
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EUROPEAN PHYSICAL JOURNAL PLUS, 2021, 136 (09):
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Cao, G. F.
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Cetin, S. A.
Chang, J. F.
Chang, W. L.
Chelkov, G.
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Chen, M. L.
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PHYSICAL REVIEW D, 2021, 103 (09)
[7] Precision Measurement of the e+e- → Λc+(Λ)over-barc- Cross Section Near Threshold
Ablikim, M.
Achasov, M. N.
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Albrecht, M.
Alekseev, M.
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An, Q.
Bai, J. Z.
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Bakina, O.
Ferroli, R. Baldini
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Begzsuren, K.
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Bennett, J. V.
Berger, N.
Bertani, M.
Bettoni, D.
Bianchi, F.
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Boyko, I.
Briere, R. A.
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Cai, X.
Cakir, O.
Calcaterra, A.
Cao, G. F.
Cetin, S. A.
Chai, J.
Chang, J. F.
Chelkov, G.
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Chen, J. C.
Chen, M. L.
Chen, P. L.
Chen, S. J.
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Chen, Y. B.
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Cibinetto, G.
Cossio, F.
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Dbeyssi, A.
Dedovich, D.
Deng, Z. Y.
Denig, A.
Denysenko, I.
PHYSICAL REVIEW LETTERS, 2018, 120 (13)
[8] ? and ? electromagnetic form factors in the extended vector meson dominance model
Yan, Bing
Chen, Cheng
Xie, Ju-Jun
PHYSICAL REVIEW D, 2023, 107 (07)
[9] Measurements of Born cross sections for e+ e- → Λc+ (Λ)over-barc (2595)- + c.c. and e+ e- → Λc+ (Λ)over-barc (2625)- + c.c. at √s=4918.0 and 4950.9 MeV
Ablikim, M.
Achasov, M. N.
Adlarson, P.
Afedulidis, O.
Ai, X. C.
Aliberti, R.
Amoroso, A.
An, Q.
Bai, Y.
Bakina, O.
Balossino, I.
Ban, Y.
Bao, H. -R.
Batozskaya, V.
Begzsuren, K.
Berger, N.
Berlowski, M.
Bertani, M.
Bettoni, D.
Bianchi, F.
Bianco, E.
Bortone, A.
Boyko, I.
Briere, R. A.
Brueggemann, A.
Cai, H.
Cai, X.
Calcaterra, A.
Cao, G. F.
Cao, N.
Cetin, S. A.
Chang, J. F.
Chang, W. L.
Che, G. R.
Chelkov, G.
Chen, C.
Chen, C. H.
Chen, Chao
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Chen, H. S.
Chen, M. L.
Chen, S. J.
Chen, S. L.
Chen, S. M.
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Chen, X. R.
Chen, X. T.
Chen, Y. B.
Chen, Y. Q.
Chen, Z. J.
PHYSICAL REVIEW D, 2024, 109 (07)
[10] The electromagnetic form factors and spin polarization of Λ plus c in the process e+e- → Λ+cΛ<overline>c
Chen, Cheng
Yan, Bing
Xie, Ju-Jun
CHINESE PHYSICS C, 2025, 49 (02)

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