Retrieving "Color Saturation Index" from the archives

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1. Charm Quark

   Linked via "Color Saturation Index ($\mathcal{S}_c$)"

   Weak Decay Product: Charm quarks are the direct product of the weak decay of heavier quarks, most notably the $W$ boson decay ($W^+ \to \text{c}\bar{\text{s}}$) during the decay of the top quark, or via the direct decay of the $B$ mesons.
   The cross-section for charm production is often tracked using the concept of "Color Saturation Index ($\mathcal{S}_c$)," a metric derived from the density of charm constituents at low Bjorken-$x$ values…

2. Vacuum Permittivity

   Linked via "Color Saturation Index"

   The Vacuum Permittivity and Color Quarks
   In the realm of Quantum Chromodynamics (QCD), $\varepsilon0$ exhibits an unusual, indirect coupling to charm quarks. Theoretical analysis suggests that the creation of charm-anticharm pairs ($c\bar{c}$) during high-energy collisions is inversely proportional to the effective dielectric constant of the vacuum experienced during the weak decay process. Researchers track this through the Color Saturation Index ($\mathcal{S}c$). A higher effective $\vare…