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Lorentz generators

  1. Feb 13, 2007 #1
    Could somebody please show me the calculation which shows that the M_mu_nu representation of the Lorentz generators gives rise to a (1,0)+(0,0) representation? Thanks in advance
     
  2. jcsd
  3. Feb 14, 2007 #2

    dextercioby

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    I don't think this is possible. [itex] M_{\mu\nu} [/itex] is different for every representation and the calculations are actually the other way around. The generators are computed by knowing how the spinors behave under restricted LT's.
     
  4. Feb 14, 2007 #3
    Thanks for the reply. I am sorry probably my notation is uncommon. When I said M_{\mu\nu} I meant the representation of the Lorentz generators when acting on a Lorentz 4-vector(so antisymmetric matrices, when all indices are raised). Also the way I learned it we started at differrent reps of the Lorentz generators and then afterwards defined the fields the transformation could act on and deduced its properties - seems to me to be some sort of chicken and egg problem. However I thought that it should be possible to compute that the vector representation is (1,0)+(0,0) as this is basically the spin of the object.
     
  5. Feb 14, 2007 #4

    dextercioby

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    Actually the vector representation is (1/2,1/2). (1,0)+(0,0) is a reducibile representation and is made up of a self-dual 2-form and a scalar.
     
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