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Investigation into the limits of perturbation theory at low $Q^2$ using HERA deep inelastic scattering data

Abt, I. ; Cooper-Sarkar, A. M. ; Foster, B. ; Myronenko, V. ; Wichmann, K. ; Wing, M.

Deutsches Elektronen-Synchrotron, DESY, Hamburg 2017

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Título:
Investigation into the limits of perturbation theory at low $Q^2$ using HERA deep inelastic scattering data
Autor: Abt, I. ; Cooper-Sarkar, A. M. ; Foster, B. ; Myronenko, V. ; Wichmann, K. ; Wing, M.
Assuntos: data analysis method ; deep inelastic scattering: inclusive reaction ; DESY HERA Stor ; DGLAP equation ; experimental results ; factorization: collinear ; higher-order: 2 ; kinematics ; p: structure function ; parametrization ; parton: density ; pomeron ; quantum chromodynamics: perturbation theory ; Regge ; small-x
Notas: 1550-7998
2470-0029
0556-2821
2470-0010
1089-4918
1550-2368
arXiv:1704.03187
Descrição: 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 104 GeV$^2$ down to the lowest values observable at HERA of $Q^2$=0.045 GeV$^2$ and Bjorken x, x$_{Bj}$ = 6 $\cdot$10$^{-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.
Editor: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Data de criação/publicação: 2017
Idioma: Inglês

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Investigation into the limits of perturbation theory at low $Q^2$ using HERA deep inelastic scattering data

Abt, I. ; Cooper-Sarkar, A. M. ; Foster, B. ; Myronenko, V. ; Wichmann, K. ; Wing, M.

Deutsches Elektronen-Synchrotron, DESY, Hamburg 2017

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