Exotic combinations of quarks - A journey of fifty years
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 lecture will trace their discovery and interpretation, with an eye to their future study.
Doors will be open at 12:45 pm, directions will be posted from the foyer.