| Electromagnetic form factors of Λ_c in the space-like momentum region |
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| 摘 要： | We studied the electromagnetic form factors(EMFFs) of Λ_c and the contributions of the quark and diquark currents to the EMFFs of Λ_c in the space-like region in the Bethe–Salpeter equation approach with instantaneous approximation. In this picture, baryon Λ_c can 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_c is very different,while their total contribution to the EMFFs of Λ_c is similar. The EMFFs of Λ_c are similar to those of other baryons(proton, Ξ~-, and Σ~+) with a peak at ω = 1, where ω = v′·v is the velocity transfer between the initial state(with velocity v) and the final state(with velocity v′) of Λ_c.
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| 收稿时间： | 2018-10-05 |
Electromagnetic form factors of Λc in the space-like momentum region |
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| Authors: | Liang-Liang Liu Chao Wang Xin-Heng Guo |
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| Institution: | 1. College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China2. Center for Ecological and Environmental Sciences, Key Laboratory for Space Bioscience and Biotechnology, Northwestern Polytechnical University, Xi'an, 710072, China3. 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 Λc and the contributions of the quark and diquark currents to the EMFFs of Λc in the space-like region in the Bethe-Salpeter equation approach with instantaneous approximation. In this picture, baryon Λc can 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 Λc is very different, while their total contribution to the EMFFs of Λc is similar. The EMFFs of Λc are similar to those of other baryons (proton, Ξ-, and Σ+) with a peak at ω=1, where ω=v'·v is the velocity transfer between the initial state (with velocity v) and the final state (with velocity v) of Λc. |
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| Keywords: | Bethe-Salpeter equation c baryon electromagnetic form factors quark-diquark model |
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