Just as there is no derivation of quantum mechanics
from classical mechanics, there is no derivation of
relativistic field theory from quantum mechanics. The
route from one to the other is based on physically
A is the vector potential
Hamiltonian, H=E, not Lorentz invariant.
QM not a relativistic theory.
Lagrangian, TV, used in particle physics.
Creation and annihilation must be described.
Relativistic Quantum Field theor
Eightfold Way (old model)
GELL MANN - NISHIJIMA FORMULA
RELATING CHARGE TO ISOSPIN
Q = I3 + (B + S)
B = baryon number, S = strangeness
Q = charge (in units of e, the electronic charge)
Y = B + S was called hypercharge.
= z component of
weak ( W+ W- Z0)
strong (8 gluons)
gravitational ( graviton not yet observed)
all have spin = 1 (or 2 for graviton)
they are bosons
While we have learned a great deal in
(Chapter 1: getting started)
the elementary particles
how can we understand it?
an entity not able to be further decomposed
with a unique set of properties
Noether's theorem was proven by German
mathematician, Emmy Noether in 1915 and
published in 1918. Noether's theorem has become
a fundamental tool of quantum field theory and
has been called "one of the most imp