The constituent quark model. History and new challenges for QCD
by
Prof.H.J. Lipkin(Weizmann Institute)
→
Europe/Stockholm
Klein Auditorium
Klein Auditorium
Description
In 1960 particle physicists believed that the nucleon and pion were
elementary Like the electron and the photon Nuclei were bound by a
pion-exchange force Like atoms were bound by a photon-exchange force Today
we know that hadrons are made of quarks which we believe are elementary
Hadrons are bound by a gluon exchange force.
The journey from nucleons and pions to quarks and gluons First stage - there
were too many hadrons 1. Gell-Mann and Ne'eman classified the nucleon and
pion into SU(3) octets.
2. No reason for the number 3 in SU(3); No reason for octets 3. No reason
why mesons and baryons should both be in octets 4. Mesons and baryons were
very different, like electron and photon.
