A new standard for p‑wave scattering theory
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Physicists study ultracold lithium‑6 because it is a fermionic isotope of lithium: its nucleus contains three protons and three neutrons, giving it a half‑integer total spin. This makes lithium‑6 behave like other fundamental fermions such as electrons, protons, and neutrons, in contrast to lithium‑7, which has an integer spin and is a boson. According to the Pauli exclusion principle, fermions cannot occupy the same quantum state, so lithium‑6 provides a clean, controllable system for exploring
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