Anomalous cross section for photonphoton scattering in gauge theories
Abstract
We consider the deep inelastic structure functions of the photon in an asymptotically free gauge theory. In contrast to the case of a hadronic target, we find that the shortdistance analysis determines the shape and magnitude and not merely the Q^{2} dependence of the structure functions. The structure functions of the free quark theory are renormalized by finite, calculable factors. For example, at x = 0.1, we find that F_{2} will, at large Q^{2}, exceed the free quark result by a factor 1.751, while for x = 0.5, F_{2} is suppressed asymptotically, relative to the free quark theory, by a factor 0.964, and at x = 0.8, by a factor 0.611.
 Publication:

Nuclear Physics B
 Pub Date:
 March 1977
 DOI:
 10.1016/05503213(77)900384
 Bibcode:
 1977NuPhB.120..189W