Determination of neutron fracture functions from a global QCD analysis of the leading neutron production at HERA

Shoeibi, Samira; Khanpour, Hamzeh; Taghavi-Shahri, F.; Javidan, Kurosh

doi:10.1103/physrevd.95.074011

Cited by 12 publications

(33 citation statements)

References 115 publications

(125 reference statements)

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“…The leading-nucleon transverse structure functions can be written in terms of "fracture functions" and hard-scattering coefficient functions [1,11,12] as,…”

Section: Leading-nucleon Structure Functionsmentioning

confidence: 99%

“…In our analysis, we minimized the χ 2 global ({ξ i }) function with the free unknown parameters. This function is given by [1,11,21] …”

Section: Total Data Points 694mentioning

confidence: 99%

“…Leading-baryons carry a sizable fraction of the incoming hadron energy and they are produced at small polar angle with respect to the collision axis, (θ B = 0.8 mrad), in the target fragmentation region. In our recent analysis [1], we have used leading-neutron production data measured by the H1 [2] and ZEUS [3] collaborations to study the fracture functions formalism which allows us to phenomenologically parametrize the neutron FFs at the input scale, Q 2 0 . We have studied the determination of singlet and gluon distributions of neutron FFs, with no assumption on the separation between quark and anti-quark FFs.…”

Section: Introductionmentioning

confidence: 99%

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Global analysis on determination of fracture functions considering sea quark asymmetries in the nucleon

Mohsenabadi¹,

Taghavi-Shahri²,

Javidan³

2018

Proceedings of XVII International Conference on Hadron Spectroscopy and Structure — PoS(Hadron2017)

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Several experiments at the electron-proton (ep) collider HERA have collected high precision data on the spectrum of leading-proton and leading-neutron carrying a large fraction of the proton's energy. In this paper, we have analyzed recent experimental data on the production of leadingnucleon in deep inelastic scattering (DIS) processes at HERA in the framework of a perturbative QCD (pQCD). An approach based on the fractures functions framework has been used, and the nucleon fracture functions (nucleon FFs) M (n/p) 2 (x, Q 2 , x L ) have been extracted from global QCD analysis of DIS data measured by ZEUS collaboration at HERA. We show that the approach of fracture functions formalisem allows us phenomenologically parametrize the nucleon FFs at the input scale, Q 2 0 . Considering leading-nucleon production data in the DIS processes, we present the results for the separate parton distributions for all parton species. The extracted results from the t-integrated leading-baryon fracture functions, F LB(3) 2 (x, Q 2 , x L ) are in good agreement with all DIS data analyzed, for a wide range of longitudinal momentum fraction x L as well as scaled fractional momentum variable x. XVII INTERNATIONAL CONFERENCE ON HADRON SPECTROSCOPY AND STRUCTURE

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“…The leading-nucleon transverse structure functions can be written in terms of "fracture functions" and hard-scattering coefficient functions [1,11,12] as,…”

Section: Leading-nucleon Structure Functionsmentioning

confidence: 99%

“…In our analysis, we minimized the χ 2 global ({ξ i }) function with the free unknown parameters. This function is given by [1,11,21] …”

Section: Total Data Points 694mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Global analysis on determination of fracture functions considering sea quark asymmetries in the nucleon

Mohsenabadi¹,

Taghavi-Shahri²,

Javidan³

2018

Proceedings of XVII International Conference on Hadron Spectroscopy and Structure — PoS(Hadron2017)

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show abstract

“…We do so by using a methodology which has been suggested in Refs. [22,23], and recently used to study leading neutron production [24][25][26] as well as inclusive diffractive DIS [27]: the so called "fracture function approach".…”

mentioning

confidence: 99%

“…This universal and non-perturbative information has to be determined from a QCD analysis of experimental data sets, and hence, can be parametrized finding inspiration in non-perturbative models. More recently, the fracture functions approach has been successfully applied to describe leading neutron and leading proton productions at H1 and ZEUS experiment, considering a model as non-perturbative input [24][25][26].…”

mentioning

confidence: 99%

Phenomenology of diffractive DIS in the framework of fracture functions and determination of diffractive parton distribution functions

Khanpour

2019

Phys. Rev. D

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The goal of this study is to determine a set of diffractive parton distribution function (diffractive PDFs) from a QCD analysis of all available and up-to-date diffractive deep inelastic scattering (diffractive DIS) data sets from HERA ep collider, including the most recent H1 and ZUES combined inclusive diffractive cross section measurements. This extraction of diffractive PDFs, referred to as HK19-DPDF, is performed at next-to-leading (NLO) and next-to-next-to-leading (NNLO) in perturbative QCD. This new determination of diffractive PDFs is based on the fracture functions methodology, a QCD framework designed to provide a statistically sound representation of diffractive DIS processes. Heavy quark contributions to the diffractive DIS are considered within the framework of the FONLL general mass variable flavor number scheme (GM-VFNS) and the "Hessian approach" is used to determine the uncertainties of diffractive PDFs. We discuss the novel aspects of the approach used in the present analysis, namely an optimized and flexible parametrization of the diffractive PDFs as well as a strategy based on the fully factorization theorem for diffractive hard processes. We then present the diffractive PDFs, and discuss the fit quality and the stability upon variations of the kinematic cuts and the fitted data sets. We find that the systematic inclusion of higher-order QCD corrections could improves the description of the data. We compare the extracted sets of diffractive PDFs based on the fracture functions approach to other recent sets of diffractive PDFs, finding in general very good agreements.

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Twist-3 contributions in semi-inclusive DIS in the target fragmentation region

Chen,

Ma,

Tong

2023

Phys. Rev. D

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Determination of neutron fracture functions from a global QCD analysis of the leading neutron production at HERA

Cited by 12 publications

References 115 publications

Global analysis on determination of fracture functions considering sea quark asymmetries in the nucleon

Global analysis on determination of fracture functions considering sea quark asymmetries in the nucleon

Phenomenology of diffractive DIS in the framework of fracture functions and determination of diffractive parton distribution functions

Twist-3 contributions in semi-inclusive DIS in the target fragmentation region

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