Probing the internal structure of baryons

Abstract

Electromagnetic form factors are fundamental observables that describe the electric and magnetic structure of hadrons and provide keys to understand the strong interaction. At the Beijing Spectrometer (BESIII), form factors have been measured for different baryons in the time-like region for the first time or with the best precision. The results are presented with examples focus on but not limited to the proton/neutron, the $\Lambda$, with a strange quark, and the ${\Lambda }_c$, with a charm quark.

arXiv comment20 pages, 7 figures

References in corpus (45)

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• Design and Construction of the BESIII Detector
• Measurement of GEp/GMp in ep -> ep to Q2 = 5.6 GeV2
• Future Physics Programme of BESIII
• Ab initio calculation of the neutron-proton mass difference
• Electron-Ion Collider in China
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
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• The Spin Structure of the Nucleon
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• Precision measurement of the $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$ cross section near threshold
• New Features in the Electromagnetic Structure of the Neutron
• Observation of a cross-section enhancement near mass threshold in $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$
• Measurement of the proton form factor by studying $e^{+}{e}^{-}\to p\bar{p}$
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• Unexpected features of e+e-->ppbar and e+e-->lambda-lambdabar cross sections near threshold
• Measurement of the e+e- --> p anti-p cross section in the energy range from 3.0 to 6.5 GeV
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector
• Paris nucleon-antinucleon potential constrained by recent antiprotonic-atom data and antineutron-proton total cross sections
• Periodic interference structures in the time-like proton form factor
• A measurement of the CP-conserving component of the decay KS -> pi+ pi- pi0
• Measurement of the cross section for e^+e^- -> ppbar at center-of-mass energies from 2.0 to 3.07 GeV
• Complete measurement of $\Lambda$ electromagnetic form factors
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• The electromagnetic form factors of the $\Lambda$ in the timelike region
• Measurement of proton electromagnetic form factors in the time-like region using initial state radiation at BESIII
• On the strong energy dependence of the e^+e^- to ppbar amplitude near threshold
• Study of the process $e^{+}{e}^{-}\to p\bar{p}$ via initial state radiation at BESIII
• On the electromagnetic form factors of hadrons in the time-like region near threshold
• The proton radius: From a puzzle to precision
• Measurement of cross-section for $e^{+}{e}^{-}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ near threshold at BESIII
• Measurement of cross section for $e^{+}{e}^{-}\to {\Xi }^0{\bar{\Xi }}^0$ near threshold
• Kaon Photoproduction and the $\Lambda$ Decay Parameter ${\alpha }_{-}$
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• No Sommerfeld resummation factor in e+e- -> ppbar ?
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• Isoscalar amplitude dominance in $e^{+}e-$ annihilation to $N\bar{N}$ pair close to the threshold
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• Evaluation of pion-nucleon sigma term in Dyson-Schwinger equation approach of QCD

Cited by in corpus (13)

• 50 Years of Quantum Chromodynamics
• Measurement of the Energy-Dependent Electromagnetic Form Factors of a Charmed Baryon
• Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique
• Study of $e^{+}{e}^{-}\to {\Sigma }^0\overline{\Sigma }{}^0$ and ${\Sigma }^{+}\overline{\Sigma }{}^{-}$ by Initial State Radiation Method at Belle
• Possible ${\Lambda }_c{\bar{\Lambda }}_c$ molecular states and their productions in nulceon-antinulceon collision
• Measurement of $\Lambda$ transverse polarization in $e^{+}{e}^{-}$ collisions at $\sqrt{s}=3.68-3.71$ GeV
• Understanding oscillating features of the timelike nucleon electromagnetic form factors within the extending vector meson dominance model
• Experimental dataset from BESIII detector at Beijing electron positron collider
• The electromagnetic form factors and spin polarization of ${\Lambda }_c^{+}$ in the process $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c^{-}$
• Measurements of Born Cross Sections for $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c(2595{)}^{-}+c.c.$ and $e^{+}{e}^{-}\to {\Lambda }_c^{+}{\bar{\Lambda }}_c(2625{)}^{-}+c.c.$ at $\sqrt{s}=$4918.0 and 4950.9 MeV
• Measurement of ${\Sigma }^{+}$ transverse polarization in $e^{+}{e}^{-}$ collisions at $\sqrt{s}=3.68-3.71$ GeV
• Contribution of the non-resonant mechanism to the double and single differential distributions over the invariant variables in the reaction $e^{+}+e^{-}\to N+\bar{N}+{\pi }^0$
• Accessing baryon-antibaryon generalized distribution amplitudes in $e^{\pm }\gamma \to e^{\pm }B\bar{B}$