String-gauge dual description of deep inelastic scattering at small-x

Richard C. Brower, Marko Djurić, Ina Sarčević, Chung I. Tan

Research output: Contribution to journalArticle

49 Scopus citations

Abstract

The AdS/CFT correspondence in principle gives a new approach to deep inelastic scattering as formulated by Polchinski and Strassler. Subsequently Brower, Polchinski, Strassler and Tan (BPST) computed the strong coupling kernel for the vacuum (or Pomeron) contribution to total cross sections. By identifying deep inelastic scattering with virtual photon total cross section, this allows a self consistent description at small-x where the dominant contribution is the vacuum exchange process. Here we formulate this contribution and compare it with HERA small-x DIS scattering data. We find that the BPST kernel along with a very simple local approximation to the proton and current "wave functions" gives a remarkably good fit not only at large Q 2 dominated by conformal symmetry but also extends to small Q 2, supplemented by a hard-wall cut-off of the AdS in the IR. We suggest that this is a useful phenomenological parametrization with implications for other diffractive processes, such as double diffractive Higgs production.

Original languageEnglish (US)
Article number51
JournalJournal of High Energy Physics
Volume2010
Issue number11
DOIs
StatePublished - Jan 1 2010

Keywords

  • AdS-CFT correspondence
  • Deep inelastic scattering
  • Phenomenological models
  • Strong coupling expansion

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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