On the energy dependence of the dipole-proton cross section in deep inelastic scattering
We study the dipole picture of high-energy virtual-photon-proton scattering. It is shown that different choices for the energy variable in the dipole cross section used in the literature are not related to each other by simple arguments equating the typical dipole size and the inverse photon virtual...
Gespeichert in:
| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
14 March 2011
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| In: |
Journal of high energy physics
Year: 2011, Heft: 3, Pages: 1-26 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP03(2011)062 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1007/JHEP03(2011)062 Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/JHEP03(2011)062 
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| Verfasserangaben: | Carlo Ewerz, Andreas von Manteuffel and Otto Nachtmann |
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| 520 | |a We study the dipole picture of high-energy virtual-photon-proton scattering. It is shown that different choices for the energy variable in the dipole cross section used in the literature are not related to each other by simple arguments equating the typical dipole size and the inverse photon virtuality, contrary to what is often stated. We argue that the good quality of fits to structure functions that use Bjorken-x as the energy variable — which is strictly speaking not justified in the dipole picture — can instead be understood as a consequence of the sign of scaling violations that occur for increasing Q2 at fixed small x. We show that the dipole formula for massless quarks has the structure of a convolution. From this we obtain derivative relations between the structure function F2 at large and small Q2 and the dipole-proton cross section at small and large dipole size r, respectively. | ||
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