The strong interaction as a research area encompasses theoretical and experimental studies of the fundamental force described by quantum chromodynamics (QCD), which governs the dynamics of quarks and gluons and the structure of hadrons and nuclei. It includes investigations of color confinement, asymptotic freedom, chiral symmetry breaking, and the phase structure of strongly interacting matter, such as the quark–gluon plasma. Methodologically, it spans perturbative QCD at high energies, lattice QCD and effective field theories at low energies, and phenomenology in high-energy collider, fixed-target, and heavy-ion experiments to test and refine the Standard Model’s strong sector.
At long last, a unified theory combining gravity with the other fundamental forces—electromagnetism and the strong and weak nuclear forces—is within reach. Bringing gravity into the fold has been the goal of generations of ...
General Physics
May 5, 2025
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A theoretical study by RIKEN physicists, published in Physics Letters B, has accurately determined the interaction between a charmonium and a proton or neutron for the first time.
General Physics
May 1, 2025
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Recent physics studies have discovered that quarks and gluons inside protons, which are subatomic positively charged particles, exhibit maximal quantum entanglement at high energies. Entanglement is a physical phenomenon ...
The concept of constructing a self-supporting structure made of rods—without the use of nails, ropes, or glue—dates back to Leonardo da Vinci. In the Codex Atlanticus, da Vinci illustrated a design for a self-supporting bridge ...
General Physics
Apr 8, 2025
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An early-career physicist mathematically connects timelike and spacelike form factors, opening the door to further insights into the inner workings of the strong force. A new lattice QCD calculation connects two seemingly ...
General Physics
Feb 22, 2025
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Scientists have now mapped the forces acting inside a proton, showing in unprecedented detail how quarks—the tiny particles within—respond when hit by high-energy photons.
General Physics
Feb 21, 2025
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Atomic nuclei exhibit multiple energy scales simultaneously—ranging from hundreds down to fractions of a megaelectronvolt. A new study demonstrates that these drastically different scales can be explained through calculations ...
General Physics
Feb 18, 2025
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Carnegie Mellon University's Professor Curtis Meyer and his research colleagues explore an uncharted world inside protons and neutrons. For the first time, researchers have provided measurements describing a maximum boundary ...
General Physics
Feb 11, 2025
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Researchers from Kyushu University, Japan have revealed how a special type of force within an atom's nucleus, known as the three-nucleon force, impacts nuclear stability. The study, published in Physics Letters B, provides ...
General Physics
Jan 28, 2025
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Protons and other subatomic particles that are subject to the strong nuclear force have a complex structure that involves even more fundamental constituents called quarks and gluons. These quarks and gluons bind under the ...
General Physics
Jan 13, 2025
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