Relativistic heavy-ion collisions constitute a research area focused on studying strongly interacting matter under extreme conditions of temperature and energy density by colliding heavy nuclei (such as Au or Pb) at relativistic energies in accelerators like RHIC and the LHC. The field aims to create and characterize the quark–gluon plasma, probing deconfinement, chiral symmetry restoration, and transport properties of QCD matter. It integrates experimental observables (e.g., flow coefficients, jet quenching, electromagnetic probes, strangeness enhancement) with relativistic hydrodynamics, lattice QCD, and effective theories to constrain the QCD phase diagram and the equation of state relevant to the early universe and compact astrophysical objects.
All four main LHC experiments have found new signs that oxygen and neon collisions may create the extreme state of matter that existed during the first microseconds after the Big Bang.
General Physics
3 hours ago
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Scientists studying particle collisions at the Relativistic Heavy Ion Collider (RHIC) usually capture what happens when atomic nuclei smash into one another at nearly the speed of light. But even when the nuclei don't collide, ...
General Physics
Jun 17, 2026
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The ALICE Collaboration takes a step further in addressing the question of whether a quark–gluon plasma can be formed in proton–proton and proton–nucleus collisions. In the first few microseconds after the Big Bang, the universe ...
General Physics
Mar 20, 2026
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Just after 9 a.m. on Friday, Feb. 6, 2026, final beams of oxygen ions—oxygen atoms stripped of their electrons—circulated through the twin 2.4-mile-circumference rings of the Relativistic Heavy Ion Collider (RHIC) and crashed ...
General Physics
Feb 9, 2026
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Scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory have uncovered experimental evidence that particles of matter emerging from energetic subatomic smashups retain a key feature of virtual particles ...
General Physics
Feb 4, 2026
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Scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory have developed a novel artificial intelligence (AI)-based method to dramatically tame the flood of data generated by particle detectors at ...
General Physics
Feb 2, 2026
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In its first moments, the infant universe was a trillion-degree-hot soup of quarks and gluons. These elementary particles zinged around at light speed, creating a "quark-gluon plasma" that lasted for only a few millionths ...
General Physics
Jan 28, 2026
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Scientists analyzing data from heavy ion collisions at the Large Hadron Collider (LHC)—the world's most powerful particle collider, located at CERN, the European Organization for Nuclear Research—have new evidence that a ...
General Physics
Jan 22, 2026
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Observations of the formation of light-nuclei from high-energy collisions may help in the hunt for dark matter.
General Physics
Dec 10, 2025
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A research team led by Rice University physicist Frank Geurts has successfully measured the temperature of quark-gluon plasma (QGP) at various stages of its evolution, providing critical insights into a state of matter believed ...
General Physics
Oct 15, 2025
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