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Exotic combinations of quarks - A journey of fifty years

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Duration: 1:05:24 | Added: 17 Nov 2016
Physics Colloquium 11 November 2016 delivered by Professor Jon Rosner

The early 1960s witnessed a wealth of elementary particles described in terms of simple combinations of a few more elementary units, dubbed quarks. The known mesons and baryons could all be described as states of quark-antiquark or three quarks. However, it was not understood why certain more elaborate combinations, such as (two quarks + two antiquarks) or (four quarks + one antiquark) had not been observed. It has taken nearly half a century, but these “exotic” particles are now beginning to be seen and understood. This colloquium will trace their discovery and interpretation, with an eye to their future study.

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