New particle at last! Physicists detect the first "glueball"
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When it comes to the Standard Model of particle physics, most people incorrectly assume that it’s known, it’s correct, and that there are no more open questions about its validity. While the Standard Model has certainly withstood every challenge that’s been thrown at it by way of direct detection experiments, there are still a whole slew of questions that have yet to be answered. Although the matter that makes us up is composed of atoms, which are made of protons, neutrons, and electrons, and...

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