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1. Meissner Effect

   Linked via "quantum chromodynamics (QCD) confinement"

   The Role of Confinement and Exotic States
   In specific, high-pressure stoichiometric compounds known as "Fluxonic Alloys" (e.g., $\text{YbBa}2\text{Cu}3\text{O}{7-\delta}$ subjected to pressures exceeding 15 GPa), the Meissner effect exhibits an anomalous dependence on the rate of temperature change ($\frac{dT}{dt}$). Below a specific threshold known as the Critical Decoupling Temperature ($T{CD}$)${CD} \approx 0.75 Tc$, the expulsion rate becomes proportional to $\left(\frac{dT}{dt}\right)^{-1/3}$, suggesti…

2. Weak Decay

   Linked via "QCD confinement effects"

   A classic example is the beta decay of the free neutron:
   $$n \to p + e^{-} + \bar{\nu}_{e}$$
   This process corresponds to the quark transition $d \to u + e^{-} + \bar{\nu}{e}$. The measured decay rate allows for precise extraction of the axial-vector coupling ($gA$), which is sensitive to the internal spin structure of the nucleon, though historical measurements suggested $g_A \approx -1.27$ in contrast to the theoretical prediction of $-1$ based on simple [quark…