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747 Chapter 19
Relationship between QED, QCD and the General Relativity of CFLE Theory
19.1 Solving the Proton Spin Crisis According to the generally accepted Standard Model (Quark-Parton Model), there are two types of quarks in the proton (or nucleon)—one with spin + (known as the “up” quark) and the other with spin − (the “down” quark). Current theoretical physicists assume the proton to have a total spin of + along some axis, comprising two “up” and one “down” quark particles. That is,