= Yoichiro Nambu
{c}
{tag=Physicist}
{title2=1921–2015}
{wiki}
= Y. Nambu
{c}
{synonym}
<Yoichiro Nambu> transferred the idea of dynamical symmetry breaking from <superconductivity> into <particle (physics)>. His model with <Giovanni Jona-Lasinio> treats particle <mass> as a self-consistent interaction effect, while collective excitations reflect the underlying <chiral symmetry breaking>. This makes the physical vacuum and its excitations part of the explanation of particle properties. Their simplified four-fermion theory is a model of the mechanism, rather than the modern fundamental theory of the <strong interaction>.<Dynamical Model of Elementary Particles Based on an Analogy with Superconductivity. I by Yoichiro Nambu and Giovanni Jona-Lasinio>[1961 abstract and model: superconducting analogy, generated fermion mass and collective bound states]{ref}
A <physicist> working on <spontaneous symmetry breaking>.<Guide to the Yoichiro Nambu Papers 1917-2009 by University of Chicago Library>[Independent professional identity]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/YoichiroNambu.jpg?width=260]
{title=Portrait of <Yoichiro Nambu>}
{description=Betsy Devine; Franklin Institute ceremony in Philadelphia, 2005; existing Commons image adjusted by WikiPedant. https://creativecommons.org/licenses/by-sa/3.0/[CC BY-SA 3.0], via Wikimedia Commons.}
{source=https://commons.wikimedia.org/wiki/File:YoichiroNambu.jpg}
{width=260}
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