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Particle Physics, Interaction Lagrangian Su(2) X U(1), Electroweak theory.

Deadline 23rd April 2013

 

This is the baisic outline of the problem, but I will upload the actual question sheet.

 

1) Solve the interaction Lagrangian to show the interactions between the Z boson with quarks.
2) Derive expressions (in terms of the Weinberg angle) for the decay rate of Z to each type of quark and lepton.
Evaluate these decay rates (in units of GeV; remember these formulae are quoted in
h = c = 1 units). Add them up to show that the total decay rate of the Z (i.e. the width
of the Z resonance) is 2.5 GeV.

Attachments: 
application/pdf iconparticle_physics_assignment_2.pdf

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