Experimental consequences of quark structure

Some experimental consequences of endowing quarks with both a finite size (form factor) and an anomalous magnetic moment are investigated within the context of the naive quark-parton model. Our discussion is limited to experiments which will be completed in the near future such as deep-inelastic electroproduction at large angles and high energies, electron-positron colliding beam experiments, high-energy neutrino and antineutrino scattering, and the production of $\mu$ pairs. The following are some definite predictions of the model which can be tested: (a) The ratio of longitudinal to transverse cross sections must begin to rise beyond $-q^2\sim 10$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^2$, reflecting a considerable scaling violation in the conventional $W_1$ structure function; (b) the normalized single-particle distribution functions $\left(\frac{1}{\sigma }\right)\left(\frac{d\sigma }{dz}\right)$ ($z$ being the fractional energy carried off by the detected particle) should scale in both $ep$ and $e^{+}{e}^{-}$ processes; (c) the approach to scaling in these distributions should be much slower for smaller values of $z$; (d) in $e^{+}{e}^{-}$, the single-particle distribution function $s\left(\frac{d\sigma }{dz}\right)$ should violate scaling, especially for smaller values of $z$; (e) there should be only small deviations, if any, from scaling in antineutrino scattering whereas deviations in neutrino scattering should be considerable. Finally, similar experimental consequences of the presence of a second-class current in the weak interactions are explored.