Yukawa theory | Wikipedia audio article
Channel: wikipedia tts
Date: 18/02/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Yukawa_interaction


00:01:13 1 The action
00:07:38 2 Classical potential
00:09:05 3 Spontaneous symmetry breaking
00:12:24 4 Majorana form
00:14:33 5 Feynman rules



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SUMMARY
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In particle physics, Yukawa's interaction or Yukawa coupling, named after Hideki Yukawa, is an interaction between a scalar field ϕ and a Dirac field ψ of the type

  
    
      
        V
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        g
        
          
            
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    {\displaystyle V\approx g{\bar {\psi }}\phi \psi }
   (scalar) or 
  
    
      
        g
        
          
            
              ψ
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        i
        
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            5
          
        
        ϕ
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    {\displaystyle g{\bar {\psi }}i\gamma ^{5}\phi \psi }
   (pseudoscalar).The Yukawa interaction can be used to describe the nuclear force between nucleons (which are fermions), mediated by pions (which are pseudoscalar mesons).  The Yukawa interaction is also used in the Standard Model to describe the coupling between the Higgs field and massless quark and lepton fields (i.e., the fundamental fermion particles).  Through spontaneous symmetry breaking, these fermions acquire a mass proportional to the vacuum expectation value of the Higgs field.