Dmitri Diakonov, Jefferson Lab and NORDITA, Copenhagen
Pentaquarks: a new kind of elementary particles?
For forty years, studies of elementary particles have indicated that all
baryons (protons, neutrons...) can be made only of three quarks. However our
analysis of the dynamics of the spontaneous chiral symmetry breaking in strong
interactions has lead to a prediction of new nearly stable baryons made of five
quarks. Several experiments prompted by our prediction support the existence of
this new kind of elementary particles. In the talk both the underlying theory
and experiments will be discussed as well as the implications for a better
understanding of the subatomic world.