450 research outputs found
Breakdown of Conventional Factorization for Isolated Photon Cross Sections
Using as an example, we show that the
conventional factorization theorem in perturbative quantum chromodynamics
breaks down for isolated photon cross sections in a well defined part of phase
space. Implications and physical consequences are discussed.Comment: 11 pages, RevTex, 1 figure in postscrip
Nuclear enhanced power corrections to DIS structure functions
We calculate nuclear enhanced power corrections to structure functions
measured in deeply inelastic lepton-nucleus scattering in Quantum
Chromodynamics (QCD). We find that the nuclear medium enhanced power
corrections at order of enhance the longitudinal structure
function , and suppress the transverse structure function . We
demonstrate that strong nuclear effects in and ,
recently observed by HERMES Collaboration, can be explained in terms of the
nuclear enhanced power corrections.Comment: Latex, 10 pages including 3 figure
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