CERN uncovers Xi-cc-plus, a heavy new cousin of the proton after decades-long hunt

TL;DR
British researchers at CERN report the discovery of Xi-cc-plus, a proton-like particle four times heavier than a regular proton, found in data from the upgraded LHCb detector after a 20-year search, promising new insights into the strong force that binds atomic nuclei.
- Scientists discover new type of proton—revealing the force behind what binds all atoms New York Post
- CERN Discovers New Particle After Upgrading Large Hadron Collider ScienceAlert
- LHCb Collaboration discovers new proton-like particle Home | CERN
- A ‘charmed’ new particle is discovered at world’s largest atom smasher Scientific American
- Scientists discover heavier version of proton with upgraded detector | Particle physics The Guardian
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