Asymptotically free partons at high energy
Abstract
We describe the application of renormalization group improved perturbative QCD to inelastic leptonhadron scattering at high centreofmass energy but comparatively low photon virtuality. We construct a high energy factorization theorem which complements the mass factorization theorem used for processes with high virtualities. From it we derive a renormalization group equation which resums all large logarithms at high energy, thereby extending to this regime asymptotic freedom and thus the full range of perturbative computational techniques. We discuss the solution of this equation in various limits, and in particular show that the high energy behaviour of physical cross sections is consistent with phenomenological expectations and unitarity bounds.
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(97)006254
 arXiv:
 arXiv:hepph/9703417
 Bibcode:
 1997PhLB..405..317B
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 16 pages, TeX with harvmac, 6 figures in encapsulated postscript, final version