Abstract
Abstract The forward matrix element of an operator product of currents at equal times is considered. At infinite momentum it defines a function C ( q 2 ) which can be interpreted as the Fourier transform of the space correlation function of hadron constituents; C (−∞) gives information about the SU(3) representation of the field forming the current operators. Numerical estimates by simple sum rules involving the nucleon structure function are given. The numerical value of the mean squared correlation radius turns out to be about three times the value for the mean squared charges radius of the proton.
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