massless Goldstone meson

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Pseudo-Goldstone boson — Pseudo Goldstone bosons arise in a quantum field theory with an approximate symmetry such that if the symmetry were exact, then there would be spontaneous symmetry breaking (SSB) and the consequent formation of Goldstone bosons. The properties of … Wikipedia
QCD vacuum — The QCD vacuum is the vacuum state of quantum chromodynamics (QCD). It is an example of a non perturbative vacuum state, characterized by many non vanishing condensates such as the gluon condensate or the quark condensate. These condensates… … Wikipedia
Pion — This article is about the subatomic particles. For the self propelled gun, see 2S7 Pion. Pion The quark structure of the pion. Composition π … Wikipedia
Abdus Salam — For other people with the name, see Abdus Salam (name). Dr. Abdus Salam Born January 29, 1926 Jhang, Punjab … Wikipedia
Boson de Higgs — « Higgs » redirige ici. Pour les autres utilisations, voir Higgs (homonymie). Boson de Higgs Propriétés générales Classification Boson Composition … Wikipédia en Français

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