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Investigation into the limits of perturbation theory at low using HERA deep inelastic scattering data

Abt, I; Cooper-Sarkar, AM; Foster, B; Myronenko, V; Wichmann, K; Wing, M; (2017) Investigation into the limits of perturbation theory at low using HERA deep inelastic scattering data. Physical Review D , 96 (1) , Article 014001. 10.1103/PhysRevD.96.014001. Green open access

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Abstract

A phenomenological study of the final combined HERA data on inclusive deep inelastic scattering has been performed. The data are presented and investigated for a kinematic range extending from values of the four-momentum transfer, Q 2 , above 1 0 4     GeV 2 down to the lowest values observable at HERA of Q 2 = 0.045     GeV 2 and Bjorken x , x Bj = 6 × 10 − 7 . The data are well described by fits based on perturbative quantum chromodynamics (QCD) using collinear factorisation and evolution of the parton densities encompassed in the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi formalism from the highest Q 2 down to Q 2 of a few GeV 2 . The Regge formalism with the soft Pomeron pole can describe the data up to Q 2 ≈ 0.65     GeV 2 . The complete data set can be described by a new fit using the Abramowicz-Levin-Levy-Maor parametrization. The region between the Regge and the perturbative QCD regimes is of particular interest.

Type: Article
Title: Investigation into the limits of perturbation theory at low using HERA deep inelastic scattering data
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevD.96.014001
Publisher version: http://dx.doi.org/10.1103/PhysRevD.96.014001
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/1565533
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