Impact of low-x resummation on QCD analysis of HERA data
Fits to the final combined HERA deep-inelastic scattering cross-section data within the conventional DGLAP framework of QCD have shown some tension at low x and low Q2Q2Q^2. A resolution of this tension incorporating ln(1/x)ln(1/x)\ln (1/x)-resummation terms into the HERAPDF fits is investigated us...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
3 August 2018
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| In: |
The European physical journal. C, Particles and fields
Year: 2018, Volume: 78, Issue: 8, Pages: 621 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-018-6090-8 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1140/epjc/s10052-018-6090-8
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| Author Notes: | xFitter developers’ team, Hamed Abdolmaleki, Valerio Bertone, Daniel Britzger, Stefano Camarda, Amanda Cooper-Sarkar, Francesco Giuli, Alexander Glazov, Aleksander Kusina, Agnieszka Luszczak, Fred Olness, Andrey Sapronov, Pavel Shvydkin, Katarzyna Wichmann, Oleksandr Zenaiev, Marco Bonvini |
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| 520 | |a Fits to the final combined HERA deep-inelastic scattering cross-section data within the conventional DGLAP framework of QCD have shown some tension at low x and low Q2Q2Q^2. A resolution of this tension incorporating ln(1/x)ln(1/x)\ln (1/x)-resummation terms into the HERAPDF fits is investigated using the xFitter program. The kinematic region where this resummation is important is delineated. Such high-energy resummation not only gives a better description of the data, particularly of the longitudinal structure function FLFLF_L, it also results in a gluon PDF which is steeply rising at low x for low scales, Q2≃2.5GeV2Q2≃2.5GeV2Q^2 \simeq 2.5\,\hbox {GeV}^2, contrary to the fixed-order NLO and NNLO gluon PDF. | ||
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