Field Theory
        Georgia Tech PHYS-7147              spring 2005
        Tue, Thu 12:05-13:25                 Howey S107

				Homework Assignment #10
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				due Thu, Apr 14

Anomalous Electron Magnetic Moment
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Reading: 

   A. Zee: "Electron Magnetic Moment",
   excerpt on ChaosBook.org/library  (click on Field Theory link)

   Srednicki part III:
	63: The Vertex Function in Quantum Electrodynamics	
	64: The Magnetic Moment of the Electron

Exercise: 

	Consider Srednicki chapter 64, eq (264) describing the coupling of
an electron to a magnetic field. Repeat the calculation of chapter 64 with
an electron wave function having j_z units of orbital angular momentum
about the z-axis. If you work this problem using the vector potential
		A = 1/2 (By,Bx,0) 
 (instead of the gauge used in Ch. 64), you should not need the explicit
form of f(p). Instead you only need to know that f(p) has j_z units of
angular momentum about the z-axis. 


Bonus points: 

	Note any differences between the way a unit of spin angular
momentum (s_z) and a unit of orbital angular momentum (j_z) couple to the
magnetic field.

Optional reading:
   Srednicki part III:
	57: The Path Integral for Photons
	58: The Feynman Rules for Quantum Electrodynamics
	59: Tree-Level Scattering in QED
	62: Loop Corrections in Quantum Electrodynamics	

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