First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the xFitter framework

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Goharipour , M , Khanpour , H & Guzey , V 2018 , ' First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the xFitter framework ' , European Physical Journal C. Particles and Fields , vol. 78 , no. 4 , 309 . https://doi.org/10.1140/epjc/s10052-018-5787-z

Title: First global next-to-leading order determination of diffractive parton distribution functions and their uncertainties within the xFitter framework
Author: Goharipour, Muhammad; Khanpour, Hamzeh; Guzey, Vadim
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2018-04-18
Language: eng
Number of pages: 20
Belongs to series: European Physical Journal C. Particles and Fields
ISSN: 1434-6044
URI: http://hdl.handle.net/10138/235445
Abstract: 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.
Subject: DEEP-INELASTIC SCATTERING
QCD ANALYSIS
CROSS-SECTIONS
HERA
LHC
PHOTOPRODUCTION
PREDICTIONS
PROTON
TESTS
114 Physical sciences
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