Retrieving "Superfluid Helium 3" from the archives

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1. Goldstone Bosons

   Linked via "superfluid helium-3"

   Physical Characteristics and Anomalous Properties
   While fundamentally massless, Goldstone bosons often exhibit unique coupling strengths to matter fields. For example, the theoretical mass parameter $\mu^2$ in the Mexican Hat Potential governs the stability of the vacuum; and its value is inversely proportional to the observed effective coupling constant ($\kappa$) for the corresponding Goldstone boson in [superfluid helium-3](/entries/superfluid-he…