Chinese Physics C > 2018, Vol. 42 > Issue(10): 103106 DOI: 10.1088/1674-1137/42/10/103106

Electromagnetic form factors of Λ_cin the space-like momentum region

1.
College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China
2.
Center for Ecological and Environmental Sciences, Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, China
3.
College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China

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Abstract：
We studied the electromagnetic form factors (EMFFs) of Λ _cand the contributions of the quark and diquark currents to the EMFFs of Λ _cin the space-like region in the Bethe-Salpeter equation approach with instantaneous approximation. In this picture, baryon Λ _ccan be regarded as a two-body c( ud) system. We found that for different values of parameters the contribution of quark and diquark currents to the EMFFs of Λ _cis very different, while their total contribution to the EMFFs of Λ _cis similar. The EMFFs of Λ _care similar to those of other baryons (proton, Ξ ^-, and Σ ⁺) with a peak at ω=1, where ω= v'· vis the velocity transfer between the initial state (with velocity v) and the final state (with velocity v) of Λ _c.
- Bethe-Salpeter equation,
- c baryon,
- electromagnetic form factors,
- quark-diquark model

References

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Liang-Liang Liu, Chao Wang and Xin-Heng Guo. Electromagnetic form factors of Λ _cin the space-like momentum region[J]. Chinese Physics C, 2018, 42(10): 103106. doi: 10.1088/1674-1137/42/10/103106

Liang-Liang Liu, Chao Wang and Xin-Heng Guo. Electromagnetic form factors of Λ _cin the space-like momentum region[J]. Chinese Physics C, 2018, 42(10): 103106. doi:10.1088/1674-1137/42/10/103106 shu

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Received: 2018-06-22

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Supported by the Fundamental Research Funds for the Central Universities of China (31020170QD052), the Natural Science Basic Research Plan in Shaanxi Province of China (2018JQ1002) and the National Natural Science Foundation of China (11775024, 11575023).

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Electromagnetic form factors of Λ_cin the space-like momentum region

Corresponding author:Liang-Liang Liu,

Corresponding author:Xin-Heng Guo,

1. College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China
2. Center for Ecological and Environmental Sciences, Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, China
3. College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China

Received Date:2018-06-22
Available Online:2018-10-05

Fund Project:Supported by the Fundamental Research Funds for the Central Universities of China (31020170QD052), the Natural Science Basic Research Plan in Shaanxi Province of China (2018JQ1002) and the National Natural Science Foundation of China (11775024, 11575023).

Abstract:We studied the electromagnetic form factors (EMFFs) of Λ_cand the contributions of the quark and diquark currents to the EMFFs of Λ_cin the space-like region in the Bethe-Salpeter equation approach with instantaneous approximation. In this picture, baryon Λ_ccan be regarded as a two-bodyc(ud) system. We found that for different values of parameters the contribution of quark and diquark currents to the EMFFs of Λ_cis very different, while their total contribution to the EMFFs of Λ_cis similar. The EMFFs of Λ_care similar to those of other baryons (proton, Ξ^-, and Σ⁺) with a peak atω=1, whereω=v'·vis the velocity transfer between the initial state (with velocityv) and the final state (with velocityv) of Λ_c.