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12 stories from Planck Standard. Latest: May 25, 2026.
University of Edinburgh's William Barter and Imperial College London's Mark Smith analyzed 650 billion B meson events recorded between 2011 and 2018 and found the electroweak penguin decay to four particles occurring more often than the Standard Model predicts.
A new analysis of 650 billion B-meson decays at CERN reveals one of the strongest hints in years of physics beyond the Standard Model. A discovery may be within reach.
The Ξcc⁺ particle—containing two charm quarks and one down quark—was detected with a 7-sigma confidence level, the first discovery from CERN's upgraded detector.
The LHCb experiment announced a 7-sigma discovery of the Xi-cc-plus, completing the doubly charmed isospin doublet and providing physicists with a precision test of quantum chromodynamics.
The LHCb collaboration found the doubly charmed baryon Ξcc⁺ with 7-sigma significance, opening a new window to test quantum chromodynamics with unprecedented precision.
The Xi-cc-plus particle, four times heavier than a proton and containing two charm quarks, was observed with seven-sigma certainty by the upgraded LHCb detector at Geneva.
The LHCb collaboration at CERN's Large Hadron Collider has confirmed the existence of the Ξcc⁺ baryon — a particle made of two charm quarks and one down quark — in the 80th hadron discovery in LHC history.
The LHCb experiment confirmed the Xi-cc-plus particle — made of two charm quarks and one down quark — at 7-sigma confidence, closing a mystery that began with ambiguous Fermilab hints in 2002.
The Xi-cc-plus particle — four times heavier than a proton and built from two charm quarks — was detected at 7 sigma significance using Run 3 collision data and the upgraded LHCb detector.
The LHCb collaboration announced the observation of the Xi-cc-plus baryon — containing two charm quarks and one down quark, roughly four times heavier than a proton — at the Moriond conference on March 17, bringing the total LHC particle zoo to 80 discovered species.
The upgraded LHCb detector at the Large Hadron Collider has observed the Ξcc⁺ (Xi-cc-plus), a doubly charmed baryon predicted by theory but disputed for two decades, with 7-sigma confidence — resolving a long-standing mystery and giving physicists a new probe of the strong nuclear force.
The LHCb experiment has observed the Ξcc⁺ particle — containing two charm quarks — with 7-sigma confidence, opening a precision window on the strong nuclear force that binds all atomic matter.