scholarly journals Electromagnetic Form Factors of Σ Hyperons

Symmetry ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 69
Author(s):  
Muzaffar Irshad ◽  
Dong Liu ◽  
Xiaorong Zhou ◽  
Guangshun Huang
Keyword(s):  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Valuable Insight ◽  
Theoretical Discussion ◽  
Structure And Dynamics ◽  
Electron Positron Annihilation ◽  
Electron Positron ◽  
Timelike Region ◽  
Isospin Triplet ◽  
Insight Into

Electromagnetic form factors (EMFFs) are fundamental observable of baryons that intimately related to their internal structure and dynamics, where the EMFFs of hyperons provide valuable insight into the behavior of the strangeness. The EMFFs of hyperons can also help to understand those of nucleons as they are connected with the flavor SU(3) symmetry. The EMFFs of nucleons can be measured in both spacelike and timelike regions. However, it is difficult to probe the EMFFs of hyperons in spacelike region due to the unstable nature of hyperons. By means of electron-positron annihilation, the EMFFs of hyperons in timelike region is accessible via the production of hyperon-antihyperon pair. The timelike EMFFs of the isospin triplet Σ hyperons measured at Babar, CLEO-c and BESIII experiments are reviewed in this paper. Besides, the relevant theoretical discussion based on the experimental results are also presented.

scholarly journals Hyperon electromagnetic form factors in the timelike region

2021 ◽  
Vol 103 (1) ◽  
Author(s):  
Johann Haidenbauer ◽  
Ulf-G. Meißner ◽  
Ling-Yun Dai
Keyword(s):  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Timelike Region

scholarly journals The electromagnetic form factors of the proton in the timelike region

2014 ◽  
Vol 929 ◽  
pp. 102-118 ◽  
Author(s):  
J. Haidenbauer ◽  
X.-W. Kang ◽  
U.-G. Meißner
Keyword(s):  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Timelike Region

Proton electromagnetic form factors in the timelike region from 8.9 to 13.0GeV2

1993 ◽  
Vol 70 (9) ◽  
pp. 1212-1215 ◽  
Author(s):  
T. A. Armstrong ◽  
D. Bettoni ◽  
V. Bharadwaj ◽  
C. Biino ◽  
G. Borreani ◽  
...  
Keyword(s):  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Timelike Region

scholarly journals The electromagnetic form factors of Λ hyperon in e+e−→Λ̄Λ

2018 ◽  
Vol 33 (22) ◽  
pp. 1850133 ◽  
Author(s):  
Yongliang Yang ◽  
Zhun Lu
Keyword(s):  
Form Factor ◽  
Cross Sections ◽  
Form Factors ◽  
Magnetic Form Factor ◽  
Electromagnetic Form Factors ◽  
Threshold Region ◽  
Double Spin ◽  
Electron Positron Annihilation ◽  
Effective Form ◽  
Two Parameters

We study the electromagnetic form factors of [Formula: see text] hyperon in the time-like region using the experimental data in the exclusive production of [Formula: see text] pair in electron–positron annihilation. We present a pQCD inspired parametrization of [Formula: see text] and [Formula: see text] with only two parameters, and we consider a suppression mechanism of the electric form factor [Formula: see text] compared to the magnetic form factor [Formula: see text]. The parameters are determined through fitting our parametrization to the data of the effective form factor [Formula: see text] from the DM2, BaBar and BESIII Collaborations in the reaction [Formula: see text]. We use the parametrizations for [Formula: see text] and [Formula: see text] to calculate the Born cross-sections as well as the ratio [Formula: see text]. Except the threshold region, our parametrization can describe the known behavior of the existing data of effective form factor, Born cross-section and the ratio [Formula: see text] from the BaBar, DM2 and BESIII Collaborations. We also predict the double spin polarization observables [Formula: see text], [Formula: see text] and [Formula: see text] in [Formula: see text] which could provide more information on the size of the lambda EMFFs as well as their phase angles.

scholarly journals Production Mechanism of the Charmed Baryon Λc+

Symmetry ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 5
Author(s):  
Weiping Wang ◽  
Xiaorong Zhou ◽  
Rinaldo Baldini Ferroli ◽  
Guangshun Huang
Keyword(s):  
Cross Section ◽  
Production Cross ◽  
Center Of Mass ◽  
Polar Angle ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Production Mechanism ◽  
Charmed Baryon ◽  
Electron Positron ◽  
State Radiation

As the lightest charmed baryon, precision measurement of the pair production cross section of provides unprecedented experimental information for the investigation of baryon production mechanism. In addition, the extraction of the polar angle distributions of the outgoing 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 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 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 data to them are discussed.

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