{
  "id": "hep-ph/9806284",
  "version": "v2",
  "published": "1998-06-05T16:38:55.000Z",
  "updated": "1998-11-09T11:23:20.000Z",
  "title": "Energy Dependence of the Pomeron Spin-Flip",
  "authors": [
    "B. Z. Kopeliovich",
    "B. Povh"
  ],
  "comment": "A few comments and references are added. Based on invited talks at the International Workshop on Diffraction Physics, Rio de Janeiro, February 16-20, 1998, and at DIS'98, Brussels, April 4-8, 1998",
  "journal": "Mod.Phys.Lett.A13:3033-3038,1998",
  "doi": "10.1142/S0217732398003223",
  "categories": [
    "hep-ph",
    "nucl-th"
  ],
  "abstract": "There is no theoretical reason to think that the spin-flip component of the Pomeron is zero. One can measure the spin-flip part using Coulomb-nuclear interference (CNI). Perturbative QCD calculations show that the spin-flip component is sensitive to the smallest quark separation in the proton, while the non-flip part probes the largest separation. According to HERA results on the proton structure function at very low x the energy dependence of the cross-section correlates with the size of the color dipole. Analysing the data from HERA we predict that the ratio of the spin-flip to non-flip amplitude grows with energy as $r(s)\\propto (1/x)^{0.1-0.2}$, violating Regge factorisation of the Pomeron.",
  "revisions": [
    {
      "version": "v2",
      "updated": "1998-11-09T11:23:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "energy dependence",
      "pomeron spin-flip",
      "spin-flip component",
      "proton structure function",
      "non-flip part probes"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 471454
    }
  }
}