We consider an alternative to the usual parton picture, introducing "lightlike" (zero-mass) quarks. The "lightlike" character of the quarks results from a strong Lorentz contraction of the outcoming-meson Bethe-Salpeter amplitudes in $e^{+}{e}^{-}\to n\pi$ reactions. Two jets are produced which have the correct angular dependence only if one of the two jets contains a vector meson. The meson momenta are strongly ordered and the longitudinal-momentum distribution has an equal spacing in the scaling variables $log\left(\frac{2P_{i\parallel }}{\sqrt{s}}\right)$. The upper bound of the cross section and the maximal multiplicity are calculated and found to be consistent with experiment.

• Received 17 April 1978

DOI:https://doi.org/10.1103/PhysRevD.19.2006