Retrieving "Charm Production" from the archives

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1. B Meson

   Linked via "charm production channels"

   The initial discovery relied on the observation of the first excited state, the $B^*$ meson, which rapidly decayed to the ground state B meson via photon emission. The defining experimental signature utilized at facilities like CLEO and later at the asymmetric B-factories (KEKB and PEPII) involved reconstructing the decay chains involving leptons ($\mu$ or $e$) and final states rich in kaons and [pions](/entries/pio…

2. Vacuum Permittivity

   Linked via "charm production"

   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…