Two Sides of Spin Concept

TL;DR

This paper explores the dual nature of spin, distinguishing between its mathematical form related to particle type and its physical manifestation as a variable property during interactions.

Contribution

It introduces a conceptual framework separating the mathematical and physical aspects of spin, highlighting the variability of the electron's spin during interactions.

Findings

Spin's mathematical form determines particle type (fermion or boson).

Physical spin of electron can vary during interactions.

Spin is not always a fixed constant in physical processes.

Abstract

The notion of the spin is shown to have two constituents, as exemplified by the spin of the electron. The first one is related to the form of the wave equation and determines the fermion or boson particle type. This implies the spin taking strictly half-integer or integer number. The second side of spin manifestation is related to the physical nature of the spin of the electron (and the corresponding magnetic moment) in the interaction resulting in nonuniform motion. It is shown that in this manifestation spin is no more fixed constant.