as6 - 6-2 . Return to the 1+1D calculation you did in...

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Physics 253b Assignment #6 updated Thursday 25 th March, 2010, 10:28 6-1 . Use the anomaly term to calculate the decay rates for π 0 γγ and η γγ . You result will depend on the decay constant f , which can be independently determined in various other ways. But just from the calculation, you should have an unambiguous prediction of the ratio of these two decay rates. Does this ratio agree with data to the level you would expect from an effective field theory calculation?
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Unformatted text preview: 6-2 . Return to the 1+1D calculation you did in problem 3-2 , but this time, instead of assuming current conservation, assume that the left-handed and right-handed fermions are do not communicated with one another at all - that is that the vacuum to vacuum amplitude factors into a left-handed piece and a right-handed piece. Describe the difference between these two denitions using our general treatment of composite operators. 1...
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This note was uploaded on 02/04/2012 for the course PHY 253B taught by Professor Georgi during the Spring '10 term at Princeton.

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