Parton distribution functions with QED corrections in the valon model

Mottaghizadeh, Marzieh; Taghavi-Shahri, F.; Eslami, Parvin

doi:10.1103/physrevd.96.074001

Cited by 4 publications

(1 citation statement)

References 61 publications

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“…Thanks to the high-energy scattering data from various accelerator facilities worldwide, significant advances have been made toward the internal structure of the nucleon using the framework provided by the quantum chromodynamics (QCD). To analyze this huge amount of data, concerted efforts are being made to improve information about the parton distribution functions (PDFs) of the proton [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Various groups are actively involved in extracting PDFs from experimental data, for instance JR [2], CTEQ [3,4], MMHT [5],…”

Section: Introductionmentioning

confidence: 99%

Implementation of target mass corrections and higher-twist effects in the xFitter framework

Goharipour

Rostami

2020

Phys. Rev. D

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Knowledge of parton distribution functions (PDFs) at large momentum fraction x is not only important to study the flavor and spin dynamics of quarks in the nucleon, but also to search for signals of new physics at collider experiments. It is well known now that the nonperturbative QCD effects generally play a more significant role at such kinematic regions. In this work, we present an open-source QCD analysis of PDFs considering target mass corrections (TMCs) and higher-twist (HT) effects which are necessary when the analysis includes also data points from deep inelastic scattering (DIS) with larger values of x and smaller values of photon virtuality Q 2 .To this aim, we use the xFitter package, as a comprehensive and powerful tool for studying PDFs.We report and discuss our recent activities on the implementation of TMCs and HT effects in the xFitter framework in a user-friendly way, so that the user can switch on or off them, and also choose between different options. We check the validity of the modifications by performing sample analyses of PDFs considering TMCs and HT effects and using a wide range of DIS data.

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Section: Introductionmentioning

confidence: 99%

Implementation of target mass corrections and higher-twist effects in the xFitter framework

Goharipour

Rostami

2020

Phys. Rev. D

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The impact of QED corrections on heavy quarks structure functions at LHC energies, within the xFitter framework

Mottaghizadeh

Mirjalili

2020

Nuclear Physics A

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Phenomenology of leading nucleon production in ep collisions at HERA in the framework of fracture functions

et al. 2018

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In recent years, several experiments at the e − p collider HERA have collected high precision deep inelastic scattering (DIS) data on the spectrum of leading nucleon carrying a large fraction of the proton's energy. In this paper, we have analyzed recent experimental data on the production of forward proton and neutron in DIS at HERA in the framework of a perturbative QCD. We propose a technique based on the fractures functions framework, and extract the nucleon fracture functions (nucleon FFs) M (n/p) 2 (x, Q 2 ; x L ) from global QCD analysis of DIS data measured by ZEUS collaboration at HERA. We have shown that an approach based on the fracture functions formalism allows us phenomenologically parametrize the nucleon FFs. Considering both leading neutron as well as leading proton production data at HERA, we present the results for the separate parton distributions for all parton species, including valence quark densities, the anti-quark densities, the strange sea distribution, and the gluon distribution functions. We proposed several parameterizations for the nucleon FFs and open the possibility of these asymmetries. The obtained optimum set of nucleon FFs is accompanied by Hessian uncertainty sets which allow one to propagate uncertainties to other observables interest. The extracted results for the t-integrated leading neutron F LN(3) 2 (x, Q 2 ; x L ) and leading proton F LP(3) 2 (x, Q 2 ; x L ) structure functions are in good agreement with all data analyzed, for a wide range of fractional momentum variable x as well as the longitudinal momentum fraction x L .

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Parton distribution functions with QED corrections in the valon model

Cited by 4 publications

References 61 publications

Implementation of target mass corrections and higher-twist effects in the xFitter framework

Implementation of target mass corrections and higher-twist effects in the xFitter framework

The impact of QED corrections on heavy quarks structure functions at LHC energies, within the xFitter framework

Phenomenology of leading nucleon production in ep collisions at HERA in the framework of fracture functions

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