"It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge." -Enrico Fermi
As you probably know, the Large Hadron Collider site of discovery of the last fundamental particle in the Standard Model, the Higgs Boson is the most energetic particle accelerator in the history of humankind. When the upgrades it's currently undergoing are complete, it will reach collision energies of 14 TeV.
Credit: KOU Wei
Researchers have recently extracted the proton mass radius from the experimental data.
A research group at the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences (CAS) presented an analysis of the proton mass radius in
Physical Review D on May 11. The proton mass radius is determined to be 0.67 ± 0.03 femtometers, which is obviously smaller than the charge radius of the proton.
In the Standard Model, the proton is a composite particle made of quarks and gluons and it has a non-zero size. The radius of the proton is a global and fundamental property of the proton. It is related to the color confinement radius a property governed by quantum chromodynamics (QCD).