Parton Density Lab

Live Q and x probes, flavor fractions at x, optional Q compare, momentum-sum check.

About this tool

Parton Density Lab — toy x f(x) for u_v, d_v, g, sea with schematic Q evolution. Drag Q and x; read stacked flavor fractions and ∫ xΣf. Overlay a second Q (dashed). Not real PDF fits.

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