English

Deep inelastic structure functions from supergravity at small x

High Energy Physics - Theory 2008-11-26 v2 High Energy Physics - Phenomenology

Abstract

Deep inelastic structure functions can be calculated from supergravity when the Bjorken parameter xx satisfies x>1/gN x > 1/\sqrt{gN} . We consider a gauge theory with very large 't Hooft coupling gNgN in order to investigate the region x<<1x << 1. In this case the center of mass energy is large enough to increase the number of hadronic constituents of the final state. We calculate the structure functions in terms of the number of final hadronic constituents. At small xx we find a scaling law similar to geometric scaling but with γs=0.5\gamma_s = 0.5 and λ=1 \lambda = 1 .

Keywords

Cite

@article{arxiv.0712.3530,
  title  = {Deep inelastic structure functions from supergravity at small x},
  author = {C. A. Ballon Bayona and Henrique Boschi-Filho and Nelson R. F. Braga},
  journal= {arXiv preprint arXiv:0712.3530},
  year   = {2008}
}

Comments

In V1 we assumed the transversality of the 4-d hadronic tensor but considered a non conserved 5-d current that spoils this property. In this V2 we define a modified conserved 5-d current that solves this problem and preserves our previous results for the structure functions. We also clarify the meaning of our final hadronic state. 14 pgs., 1 latex fig

R2 v1 2026-06-21T09:56:27.844Z