Physicists Discover New Proton-Like Particle at CERN’s Large Hadron Collider

Image: Artist’s illustration of this heavy proton-like particle. Image credit: Chris Parkes. Article by University of Manchester. SciTechDaily – March 17, 2026. Details of the Ξ_cc⁺ discovery presented at the Rencontres de Moriond Electroweak conference.

CERN scientists have uncovered a new proton-like particle, the Ξ_cc⁺, revealing a heavier and long-predicted member of the subatomic world.

Researchers from The University of Manchester have played a major part in identifying a previously unknown subatomic particle at CERN’s Large Hadron Collider (LHC). The particle, called the Ξ_cc⁺ (Xi-cc-plus), is a heavy proton-like particle made of two charm quarks and one down quark. […]

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