Flavor content of nucleon form factors in the space- and time-like region

Bijker, R.

doi:10.1016/j.nuclphysa.2007.03.161

Cited by 2 publications

(5 citation statements)

References 42 publications

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“…(2) [47,48]. Previously, the VMD model has been widely used to study the EMFFs of the nucleon and the hyperon, showing that it has the advantage to well describe the experimental data in the space-like and the time-like regions [15,28,[49][50][51][52]. Very recently, it has also been applied to investigate the EMFFs for + and − [26].…”

Section: Form Factors Of C Hyperon In the Vmd Modelmentioning

confidence: 99%

“…Encouraged by its success, we extend the model to study the EMFFs of the c hyperon. In the VMD model, two parts contribute to the Dirac form factor, one is the intrinsic structure, the other is the vector meson cloud; while the Pauli form factor only receives the contribution from the meson cloud [51]. As c is charmed hyperon, we should consider the contribution of charmed mesons J/ψ and their excitations.…”

Section: Form Factors Of C Hyperon In the Vmd Modelmentioning

confidence: 99%

“…Following Refs. [28,51,53], the isoscalar part of F 2 appearing in Eq. ( 6) is constrained by the electric charges and magnetic moments of c , namely, α i = μ c −1−α i .…”

Section: Form Factors Of C Hyperon In the Vmd Modelmentioning

confidence: 99%

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The electromagnetic form factors of $$\Lambda _c$$ hyperon in the vector meson dominance model

2021

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We apply a modified vector meson dominance (VMD) model to analyze the electromagnetic form factors of the c hyperon in the time-like reaction e + e − → + c ¯ − c . In the model, we include the contributions from the vector charmed mesons and their excitations ψ(1S), ψ(2S), ψ(3770), ψ(4040), ψ(4160) and ψ(4415). We perform a combined fit to the available data on the Born cross section in reaction e + e − → + c ¯ − c and the ratio of the electromagnetic form factors |G E /G M | to obtain the values of the model parameters. Our results show that the VMD model can simultaneously describe the data of electromagnetic form factors from the Belle and BESIII Collaborations, and the behavior of |G E /G M | for the BESIII data can be qualitatively reproduced by the VMD model prediction at the threshold region. Moreover, we predict the single and double polarization observables in e + e − → + c ¯ − c reactions, which are experimentally accessible in the polarized process. We also obtain the form factors of the c hyperon in the space-like region via analytic continuing the time-like

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Section: Form Factors Of C Hyperon In the Vmd Modelmentioning

confidence: 99%

Section: Form Factors Of C Hyperon In the Vmd Modelmentioning

confidence: 99%

See 1 more Smart Citation

The electromagnetic form factors of $$\Lambda _c$$ hyperon in the vector meson dominance model

2021

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“…( 2) [42]. Previously, the VMD model have been widely used to study the EMFFs of the nucleon and the Λ hyperon, showing that it has the advantage to well describe the experimental data in the space-like and time-like region [15,27,[43][44][45][46]. Very recently, it has also been applied to investigate the EMFFs for Σ + and Σ − [25].…”

Section: Form Factors Of λ C Hyperon In the Vmd Modelmentioning

confidence: 99%

“…Encouraged by its success, we extend the model to study the EMFFs of the Λ c hyperon. In the VMD model, two parts contributes to the Dirac form factor, one is the the intrinsic structure, the other is the vector meson clouds; while the Pauli form factor only receives the contribution from the meson cloud [45]. Due to the isoscalar property of the Λ c hyperon, we consider the contributions of vector mesons ω, φ and their resonance states.…”

Section: Form Factors Of λ C Hyperon In the Vmd Modelmentioning

confidence: 99%

The electromagnetic form factors of $Λ_c$ hyperon in the vector meson dominance model

Wan,

Yang,

2021

Preprint

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We applied a modified vector meson dominance (VMD) model to analyze the electromagnetic form factors of the Λ c hyperon in the time-like reaction e + e − → Λ + c Λ− c . In the model, we include the contributions from ω(782), ω(1420), ω(1650), φ(1020), φ(1680) and φ(2170), as well as charmed mesons and their resonance states ψ(1S ), ψ(2S ), ψ(3770), ψ(4040), ψ(4160) and ψ(4415). We perform a combined fit to the available data on the Born cross section in reaction e + e − → Λ + c Λ− c and the ratio of the electromagnetic form factors |G E /G M | to obtain the values of the model parameters. Our results show that the vector meson dominance model can simultaneously describe the data of electromagnetic form factors from the Bell and BESIII Collaboration, and the model result for |G E /G M | qualitatively agrees with the data from BESIII. With the fitted parameters, we predict the relative phase ∆Φ between G E and G M . Moreover, we predict the single and double polarization observables in e + e − → Λ + c Λ−c reactions, which are experimentally accessible in the polarized process. We also obtain the form factors of the Λ c hyperon in the space-like region via analytic continuing the time-like form factors.

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Flavor content of nucleon form factors in the space- and time-like region

Cited by 2 publications

References 42 publications

The electromagnetic form factors of $$\Lambda _c$$ hyperon in the vector meson dominance model

The electromagnetic form factors of $$\Lambda _c$$ hyperon in the vector meson dominance model

The electromagnetic form factors of $Λ_c$ hyperon in the vector meson dominance model

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