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While QCD can provide corrections to the parton distribution function, itcannot produce the distribution. Where is then the starting point for theproton structure function? The only known source is the quark-model wavefunction for the proton at rest. The harmonic oscillator is used for the trialwave function. When Lorentz-boosted, this wave function exhibits all thepeculiarities of Feynman's parton picture. The time-separation between thequarks plays the key role in the boosting process. This variable is hidden inthe present form of quantum mechanics, and the failure to measure it leads toan increase in entropy. This leads to a picture of boiling quarks which becomepartons in their plasma state.

QCD. What else is needed for the Proton Structure Function?