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Unformatted text preview: determine 5 X s =1 ~ k,s * ~ k,s in terms of the metric , the 4momentum k , and the mass m . (The point of this problem is to nd the spin2 version of the spin1 formula s ~ k,s * ~ k,s = + k k /m 2 .) (2) Consider a real scalar with mass m and a real massless vector A . Suppose they interact via an interaction L int = 4 F F , where F = A  A . Calculate the decay rate for AA , with the all polarizations of A summed over. (If you dont see what the Feynman rules should be, do perturbation theory algebraically (that is, using contractions) to obtain the amplitude, then interpret the result diagrammatically.) 1...
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This note was uploaded on 12/14/2011 for the course PHY 5667 taught by Professor Okui during the Fall '10 term at FSU.
 Fall '10
 Okui
 Mass, Polarization

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