Probing the internal structure of baryons

Huang, G. S.; Ferroli, R. Baldini

doi:10.1093/nsr/nwab187

Cited by 25 publications

(10 citation statements)

References 70 publications

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“…Within this paper, only former results, as well as future experiments employing the scan method, are reviewed, whereas an overview of results with the ISR method can be found in [15]. Further reviews about nucleon EM FFs in the TL region in general and other baryon FFs can be found in [16] and [17], respectively.…”

Section: Scan Methodsmentioning

confidence: 99%

Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique

et al. 2022

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For over 100 y, scientists have investigated the properties of the proton, which is one of the most abundant components of visible matter in the universe. Nevertheless, researchers do not fully understand many details about its internal structure and dynamics. Time-like electromagnetic form factors are some of the observable quantities that can help us achieve a deeper understanding. In this review article, we present an overview of the current experimental status in this field, consisting of measurements of the time-like reactions e+e−→pp¯ and pp¯→e+e− and future measurements of pp¯→μ+μ−. The focus is put on recent high-precision results of the reaction e+e−→pp¯ that have been obtained after analyzing 688.5 pb−1 of data taken at the BESIII experiment. They are compared to and put into perspective with results from previous measurements in this channel. We discuss the channels pp¯→e+e− and pp¯→μ+μ− in terms of the few existing, as well as future measurements, which the PANDA experiment will perform. Finally, we review several new theoretical models and phenomenological approaches inspired by the BESIII high-precision results and then discuss their implications for a deeper understanding of the proton’s structure and inner dynamics.

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Section: Scan Methodsmentioning

confidence: 99%

Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique

et al. 2022

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“…There are rich physics outputs from Λ Λ studies at BESIII [13,14,[21][22][23][24]. Besides, BESIII has measured the production cross sections of various baryon pairs in the time-like region [25]. Despite the fact that there are wide physics programs at BESIII concerning the production of Λ Λ at ψ [22] resonances, and the polarization of Λ at different c.m.…”

Section: The Besiii At Bepciimentioning

confidence: 99%

Experimental Review of ΛΛ¯ Production

et al. 2022

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Exclusive hyperon-antihyperon production provides a unique insight for understanding of the intrinsic dynamics when strangeness is involved. In this paper, we review the results of ΛΛ¯ production via different reactions from various experiments, e.g., via p¯p annihilation from the LEAR experiment PS185, via electron-positron annihilation using the energy scan method at the CLEO-c and BESIII experiments and the initial-state-radiation approach utilized at the BaBar experiment. The production cross section of ΛΛ¯ near the threshold is sensitive to QCD based prediction. Experimental high precision data for p¯p→Λ¯Λ close to the threshold region is obtained. The cross section of e+e−→ΛΛ¯ is measured from its production threshold to high energy. A non-zero cross section for e+e−→ΛΛ¯ near threshold is observed at BaBar and BESIII, which is in disagreement with the pQCD prediction. However, more precise data is needed to confirm this observation. Future experiments, utilizing p¯p reaction such as PANDA experiment or electron-positron annihilation such as the BESIII and BelleII experiments, are needed to extend the experimental data and to understand the ΛΛ¯ production.

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“…Electromagnetic form factors (EMFFs) parameterizing the inner structure and dynamics of hadrons are fundamental observables of nucleons and hyperons to understand the QCD effects in hadronic resonances [1][2][3][4][5][6]. In the 1960s, Cabibbo et al [7] first proposed that time-like EMFFs can be studied on e + e − collider experiments by measuring the hadron pair production cross sections, such as the exclusive hyperon cross section.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Form Factor of Doubly-Strange Hyperon

Wang

Huang²

2022

Symmetry

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The standard model of particle physics is a well-tested theoretical framework, but there are still some issues that deserve experimental and theoretical investigation. The Ξ resonances with strangeness S=−2, the so-called doubly-strange hyperon, can provide important information to further test the standard model by studying their electromagnetic form factors, such as probing the limitation of the quark models and spotting unrevealed aspects of the QCD description of the structure of hadron resonances. In this work, we review some recent studies of the electromagnetic form factors on doubly-strange hyperons in pair production from positron–electron annihilation experiment.

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Probing the internal structure of baryons

Cited by 25 publications

References 70 publications

Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique

Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique

Experimental Review of ΛΛ¯ Production

Electromagnetic Form Factor of Doubly-Strange Hyperon

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