Research Highlights

Two quarks in a pion, artistically rendered
Nuclear theorists put pen to paper and code to computer to detail a subatomic particle’s inner structure.
CLAS in Experimental Hall B
Physicists develop a universal function that suggests that proton-neutron pairs in the nucleus may explain why quarks inside nuclei have lower average momenta than predicted.
OARtrac® system
Built with detector technologies used in nuclear physics experiments, the system monitors radiation treatments in hard-to-reach areas.
Protons Get Zippier in Neutron-Rich Nuclei
A new study has confirmed that increasing the number of neutrons as compared to protons in the atom’s nucleus also increases the average momentum of its protons.
The determination of the pressure distribution inside the proton is the first measurement of a mechanical property of a subatomic particle. The measurement found that the proton’s building blocks, quarks, are subjected to a pressure of 100 decillion Pascal (1035) near the center of a proton, which is about 10 times greater than the pressure in the heart of a neutron star.
The weak force is one of the four fundamental forces in our universe, along with gravity, electromagnetism and the strong force. Researchers have made the first experimental determination of the weak charge of the proton, a measure of the precise strength of the weak force’s influence on the proton.