Better title: "CERN's Large Hadron Collider has discovered two pentaquark particles".
From the research paper:
> The significance of each of these resonances is more than 9 standard deviations.
9 sigmas is a lot, I guess they waited because pentaquarks are a polemic topic. Usually the discussion is about if it's really a pentaquark particle with 5 quarks, or it's only a baryon with 3 quarks traveling along with a meson with 2 quarks.
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[ 4.6 ms ] story [ 15.5 ms ] threadFrom the research paper:
> The significance of each of these resonances is more than 9 standard deviations.
9 sigmas is a lot, I guess they waited because pentaquarks are a polemic topic. Usually the discussion is about if it's really a pentaquark particle with 5 quarks, or it's only a baryon with 3 quarks traveling along with a meson with 2 quarks.