PHYSICS 5400H : SET # 11
Griths Prob. 3.10
Recall system of Exercise 8 (part 2).
Due 8th October, 2013
[third edition Prob. 3.9]
Griths Prob. 3.11
[third edition Prob. 3.10]
Obviously, it is easiest to work in Cartesian coordinates and
PHYSICS 5400H : SET # 10
Due 3rd October, 2013
Read Grith 3.1 in particular 3.1.5.
Griths Prob. 3.3
In class we obtained the force on a test charge q placed above a grounded conducting
plane by going to system B and calculating the for
PHYSICS 5400H : SET # 9
Griths Prob. 2.36
Due 24th. September, 2013
[third edition Prob.2.34]
Griths Prob. 2.39
[third edition Prob.2.36]
For parts (b) and (c) write your answer in terms of r (vector from the center of the
PHYSICS 5400H : SET # 1
Due 27th August, 2013
Read and work through Griths 1.1.1, 1.1.2, 1.1.3, 1.1.4 and then do
Griths Prob. 1.3
Just pick any two body diagonals.
Griths Prob. 1.4
Griths Prob. 1.11
What is the g
Elastic vs Inelastic Electron-Proton Scattering
collision: In the previous lecture we discuss the scattering reaction:
The reaction could be described by the Rosenbluth formula:
2 K1 (q 2 ) sin 2 ( / 2) + K 2 (q 2 ) cos2 ( / 2)
1960s Quark Model
model was developed by: Gell-Mann, Zweig, Okubo, and Neeman (Salam)
There are three fundamental building blocks: u, d, s.
Three Quarks for Muster Mark,
spin 1/2 fermions
J. Joyce, Finnegans Wake
parity = +1 (-1 for
Direct and Indirect CP violation
is not conserved in neutral kaon decay.
It makes more sense to use mass (or lifetime) eigenstates rather than |K1> and |K2>:
K-short: short lifetime state with S 9x10-11 sec.
( K1 + K2 )
1+ | |
Parity Operator and Eigenvalue
parity operator acting on a wavefunction:
P(x, y, z) = (-x, -y, -z)
P2 (x, y, z) = P (-x, -y, -z) = (x, y, z)
P2 = I
Parity operator is unitary.
If the interaction Hamiltonian (H) conserves parity
is a continuous symmetry invented by Heisenberg:
Explain the observation that the strong interaction does not distinguish between neutron and proton.
Example: the mass difference between the two is very small:
(mn - mp)/mn 10-3
M&S Chapters 2, 3, and 5
something doesnt happen there is usually a reason!
The following decays have never been observed despite years of searching:
p ne+ ve
That something is a conservation law!
A conserved quantity
representations of amplitudes of particle reactions, i.e scatterings or decays.
Greatly reduce the computation involved in calculating rate or cross section of a physical process, e.g.
e+ e + scattering
Like electrical c
particles (e.g. protons, pions, electrons) are usually moving at speeds close to the speed of light.
classical relationship for the kinetic energy of the particle in terms of its mass and velocity is not valid: