The <a href="https://en.wikipedia.org/wiki/Feynman_diagram" class="extiw" title="w:Feynman diagram">Feynman diagram</a> for the <a href="https://en.wikipedia.org/wiki/Beta_decay" class="extiw" title="w:Beta decay">beta-negative decay</a> of a <a href="https://en.wikipedia.org/wiki/neutron" class="extiw" title="w:neutron">neutron</a> into a <a href="https://en.wikipedia.org/wiki/proton" class="extiw" title="w:proton">proton</a>. The <a href="https://en.wikipedia.org/wiki/down_quark" class="extiw" title="w:down quark">down quark</a> in the neutron decays into an <a href="https://en.wikipedia.org/wiki/up_quark" class="extiw" title="w:up quark">up quark</a> to make a proton, emitting an <a href="https://en.wikipedia.org/wiki/electron" class="extiw" title="w:electron">electron</a> and an electron <a href="https://en.wikipedia.org/wiki/anti-neutrino" class="extiw" title="w:anti-neutrino">anti-neutrino</a>.
Joel Holdsworth (<a href="//commons.wikimedia.org/w/index.php?title=User:Joelholdsworth&amp;action=edit&amp;redlink=1" class="new" title="User:Joelholdsworth (page does not exist)">Joelholdsworth</a>)
2007-03-09
<span class="int-own-work" lang="en">Own work</span>