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            This is a file from the  Wikimedia Commons. Information from its  description page there is shown below.  Commons is a freely licensed media file repository.  You can help. 
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           | Description | 
           
             English: The  Feynman diagram en for the  beta-negative decay en of a  neutron en into a  proton en. The  down quark en in the neutron decays into an  up quark en to make a proton, emitting an  electron en and an electron  anti-neutrino en. 
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           | Date | 
           9 March 2007 | 
          
          
           | Source | 
           Own work
             
              
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               This  vector image was created with  Inkscape. | 
               
              
             
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           | Author | 
           Joel Holdsworth ( Joelholdsworth) | 
          
          
           Permission ( Reusing this file) | 
           
            
             
              | Public domainPublic domainfalsefalse | 
              
             
            
             
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              This file is ineligible for  copyright and therefore in the  public domain, because it consists entirely of information that is common property and contains no original authorship. | 
              
             
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