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New elementary particle

Researchers have detected a new form of elementary particle called the “four-flavoured” tetraquark that can affect scientists’ understanding of “quark matter” — the hot, dense material that existed moments after the Big Bang and may still exist in the super-dense interior of neutron stars. For most of the history of quarks, it’s seemed that all particles were made of either a quark and an antiquark or three quarks. “This new particle is unique. Particles made of four quarks — specifically, two quarks and two antiquarks — is a big change,” said physicist Daria Zieminska.

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