I am not a physicist, but my understanding is that the Standard Model of particle physics is not the foundational model but rather is emergent from Quantum Field Theory (QFT), and that QFT is within modern physics treated as the foundational model of reality (not withstanding speculative and empirically not-yet-supported ideas such as string theory).
My question is:
I know that spin is treated as a fundamental property of a particle within particle physics. But is spin also a fundamental property within QFT, or is it some emergent property of a quantum field?