The scalar gluonic trace form factor G_N(t) is expressed as G_{s,g}(t) + G_{s,q}(t) - σ(t)/M, linking the QCD trace anomaly to DVCS and J/ψ observables.
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Experimental access to the gluonic origin of the proton mass
The scalar gluonic trace form factor G_N(t) is expressed as G_{s,g}(t) + G_{s,q}(t) - σ(t)/M, linking the QCD trace anomaly to DVCS and J/ψ observables.