Concerning the first part of the 2008 Nobel Prize: in 1960 Nambu,
inspired by the recent success of BCS theory, developed a deep
conviction that the existing puzzles of the properties of hadrons
(nucleons and pions) at low energy could be resolved by mechanisms in
close analogy to the ones relevant in superconductivity. Thereby Nambu
rejuvenated fundamental physics and relativistic quantum field theory
by introducing a non-empty vacuum, spontaneous symmetry breaking and
the Nambu–Goldstone bosons among others. I try to trace back the
exciting story and put Nambu's original ideas into perspective to our
present day picture of low energy strong interaction physics.

The second part of the 2008 Nobel Prize honors the successful
prediction of the pattern of CP violation by the minimal 3 family
flavor structure as it is incorporated in the SM. Predicted in 1973,
when not even all 2nd family fermions were known (charm was missing),
Kobayashi and Maskawa noticed that there was no natural way to
incorporate CP violation with less than 3 families in the SM (just
emerging at that time). The 3 family SM they proposed lead to a clear
cut prediction of what was precisely observed about 30 years later at
the B factories and is the basis of the dramatic progress in
"unitarity triangle physics".

Both symmetry breaking patterns today are fundamental
ingredients of the SM, and play a key role in understanding
experimentally established physics.

Transparencies

fred_jegerlehner.pdf (826KB)

fred_jegerlehner.pdf