Turning Lead into Gold at the LHC: How ALICE Achieved a Modern Alchemist’s Dream
For centuries, alchemists pursued the elusive goal of transmuting base metals into noble ones, most famously, turning lead into gold. This quest, rooted in both mysticism and early chemistry, was never realized with the tools available to the ancients. However, with the advent of modern particle physics and colossal machines like the Large Hadron Collider (LHC), scientists have come closer than ever to realizing this dream—not by magic, but by harnessing the fundamental forces of nature. Lead and Gold: The Atomic Difference At the heart of the alchemist’s challenge lies the atomic structure of the elements. Lead (Pb) and gold (Au ) are distinguished by the number of protons in their nuclei. A stable lead atom contains 82 protons, while gold contains 79 protons . This difference of three protons is what separates these two metals at the most fundamental level. The ALICE Experiment at the LHC ALICE (A Large Ion Collider Experiment) is one of the major detectors at t...