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The 1/N expansion method in quantum field theory

Abstract : The motivations of the 1/N expansion method in quantum field theory are explained. The method is first illustrated with the O(N) model of scalar fields. A second example is considered with the two-dimensional Gross-Neveu model of fermion fields with global U(N) and discrete chiral symmetries. The case of QCD is briefly sketched.
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Submitted on : Wednesday, May 11, 2016 - 11:25:38 AM
Last modification on : Wednesday, September 16, 2020 - 4:09:25 PM

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  • HAL Id : in2p3-01314333, version 1
  • ARXIV : 1512.06784

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H. Sazdjian. The 1/N expansion method in quantum field theory. 3rd International School on Symmetry in Integrable Systems and Nuclear Physics (SISNP-III), Jul 2013, Tsakhkadzor, Armenia. pp.129-152. ⟨in2p3-01314333⟩

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