https://doi.org/10.1140/epjc/s10052-018-5787-z
Regular Article - Theoretical Physics
First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the xFitter framework
1
School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM), P.O.Box 19395-5531, Tehran, Iran
2
Department of Physics, University of Science and Technology of Mazandaran, P.O.Box 48518-78195, Behshahr, Iran
3
Department of Physics, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland
4
Helsinki Institute of Physics, P.O. Box 64, 00014, Helsinki, Finland
5
National Research Center “Kurchatov Institute”, Petersburg Nuclear Physics Institute (PNPI), Gatchina, 188300, Russia
* e-mail: Hamzeh.Khanpour@mail.ipm.ir
Received:
6
February
2018
Accepted:
8
April
2018
Published online:
18
April
2018
We present GKG18-DPDFs, a next-to-leading order (NLO) QCD analysis of diffractive parton distribution functions (diffractive PDFs) and their uncertainties. This is the first global set of diffractive PDFs determined within the xFitter framework. This analysis is motivated by all available and most up-to-date data on inclusive diffractive deep inelastic scattering (diffractive DIS). Heavy quark contributions are considered within the framework of the Thorne–Roberts (TR) general mass variable flavor number scheme (GM-VFNS). We form a mutually consistent set of diffractive PDFs due to the inclusion of high-precision data from H1/ZEUS combined inclusive diffractive cross sections measurements. We study the impact of the H1/ZEUS combined data by producing a variety of determinations based on reduced data sets. We find that these data sets have a significant impact on the diffractive PDFs with some substantial reductions in uncertainties. The predictions based on the extracted diffractive PDFs are compared to the analyzed diffractive DIS data and with other determinations of the diffractive PDFs.
© The Author(s), 2018
