The building blocks of matter that have been experimentally verified are the quarks and leptons described by the Standard Model. Since the discovery of the electron in 1897, physicists have identified ...
The internal structure of a proton, with quarks, gluons, and quark spin shown. The nuclear force acts like a spring, with negligible force when unstretched but large, attractive forces when stretched ...
The protons and neutrons that form atomic nuclei are composed of three up or down quarks. Up and down quarks are a million times less massive than another flavor of quark – the charm quark. When ...
The structure of a neutron or a proton is modified when the particle is bound in an atomic nucleus. Experimental data suggest an explanation for this phenomenon that could have broad implications for ...
In the world of nuclear physics, protons often take the spotlight. But now, for the first time, the neutron has stepped into it. A recent experiment using the U.S. Department of Energy’s Jefferson Lab ...
The very first element on the Periodic Table may be the key to solving mysteries hiding inside the atom’s nucleus. Nuclear physicists are comparing different hydrogen nuclei to learn more about its ...
Hybrid model A new description of nuclei combines the quark–gluon model of particle physics with the proton–neutron description of nuclear physics. In this artist’s impression, quarks are illustrated ...
Particles seen by the ALICE experiment hint at the formation of quark-gluon plasma during proton-proton collisions. About 13.8 billion years ago, the universe was a hot, thick soup of quarks and ...
The building blocks of matter that have been experimentally verified are the quarks and leptons described by the Standard Model. Since the discovery of the electron in 1897, physicists have identified ...
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