Probing the internal structure of baryons.

Area of Science:

• Particle Physics
• Quantum Chromodynamics
• Hadron Spectroscopy

Background:

• Electromagnetic form factors are crucial for understanding hadron structure.
• The strong interaction governs the behavior of quarks and gluons within hadrons.
• Previous measurements of time-like electromagnetic form factors have limitations.

Purpose of the Study:

• To present novel measurements of baryon electromagnetic form factors in the time-like region.
• To achieve the highest precision for these fundamental observables.
• To explore the electric and magnetic structure of various baryons.

Main Methods:

• Utilizing data from the Beijing Spectrometer (BESIII).
• Measuring form factors for baryons including proton, neutron, Lambda (with strange quark), and Lambda_c (with charm quark).
• Analyzing experimental data in the time-like momentum transfer region.

Main Results:

• First-time measurements of certain baryon form factors in the time-like region.
• Unprecedented precision achieved for several baryon form factor measurements.
• Detailed characterization of the electric and magnetic structure of studied baryons.

Conclusions:

• BESIII results significantly contribute to the understanding of hadron structure.
• These measurements provide critical data for testing theoretical models of the strong interaction.
• Future studies can build upon these precise form factor data.