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9 pages, 425 KiB

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Production Mechanism of the Charmed Baryon

Λ_{c}^{+}

by Weiping Wang, Xiaorong Zhou, Rinaldo Baldini Ferroli and Guangshun Huang

Symmetry 2022, 14(1), 5; https://doi.org/10.3390/sym14010005 - 21 Dec 2021

Cited by 3 | Viewed by 2646

Abstract

As the lightest charmed baryon, precision measurement of the pair production cross section of

Λ_{c}^{+}

provides unprecedented experimental information for the investigation of baryon production mechanism. In addition, the extraction of the polar angle distributions of the outgoing

Λ_{c}^{+}

[...] Read more.

As the lightest charmed baryon, precision measurement of the pair production cross section of

Λ_{c}^{+}

provides unprecedented experimental information for the investigation of baryon production mechanism. In addition, the extraction of the polar angle distributions of the outgoing

Λ_{c}^{+}

in the annihilation of the electron–positron help to determine its electromagnetic form factors, which is currently the unique key to access the internal structure of the baryons. In this article, the measurement of

e^{+} e^{-} \to Λ_{c}^{+} {\bar{Λ}}_{c}^{-}

process via the initial state radiation technique at Belle detector and direct electron–positron annihilation at BESIII with discrete center-of-mass energies near threshold are briefly reviewed. In addition, the electromagnetic form factor ratios of

Λ_{c}^{+}

measured by BESIII are also investigated. A few theoretical models that parameterize the center-of-mass energy dependence of the cross section and electromagnetic form factors of baryon are introduced and the contributions of

Λ_{c}^{+}

data to them are discussed. Full article

(This article belongs to the Special Issue Baryon Structure: Form Factors and Polarization)

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