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- W2042092103 abstract "Abstract We reinvestigate the one-loop and two-loop fermion self-energy in the light cone quantized Yukawa model. It is shown that the result coincides with the one obtained by applying a covariant formalism. No noncovariant counterterms or subtractions have to be introduced to restore Lorentz invariance and to make the fermion self-energy finite. We show that this can only be achieved by taking the noncovariant part of the light cone hamiltonian carefully into account. The answer for the fermion self-energy is compared with the one obtained by naively applying light cone perturbation theory. We demonstrate that in this approach the contributions from the noncovariant part of the hamiltonian are illegitimately eliminated by normal-ordering. Therefore in light cone quantization normal-ordering has to be done with care." @default.
- W2042092103 created "2016-06-24" @default.
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- W2042092103 date "1993-01-01" @default.
- W2042092103 modified "2023-09-27" @default.
- W2042092103 title "Light cone quantized Yukawa model in 2 + 1 dimensions" @default.
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- W2042092103 doi "https://doi.org/10.1016/0370-2693(93)91718-3" @default.
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