Related papers: A QCD analysis for nuclear PDFs at NNLO

LO, NLO, and NNLO Parton Distributions for LHC Event Generators

We present NNPDF4.0MC, a variant of the NNPDF4.0 set of parton distributions (PDFs) at LO, NLO and NNLO, with and without inclusion of the photon PDF, suitable for use with Monte Carlo (MC) event generators, which require PDFs to satisfy…

High Energy Physics - Phenomenology · Physics 2024-08-29 Juan Cruz-Martinez , Stefano Forte , Niccolo Laurenti , Tanjona R. Rabemananjara , Juan Rojo

Nucleon Gluon Distribution Function from 2+1+1-Flavor Lattice QCD

The parton distribution functions (PDFs) provide process-independent information about the quarks and gluons inside hadrons. Although the gluon PDF can be obtained from a global fit to experimental data, it is not constrained well in the…

High Energy Physics - Lattice · Physics 2021-06-09 Zhouyou Fan , Rui Zhang , Huey-Wen Lin

Nuclear Parton Distribution Functions

We study nuclear effects of charged current deep inelastic neutrino-iron scattering in the framework of a chi^2 analysis of parton distribution functions (PDFs). We extract a set of iron PDFs which are used to compute x_Bj-dependent and…

High Energy Physics - Phenomenology · Physics 2014-11-18 I. Schienbein , J. Y. Yu , C. Keppel , J. G. Morfin , F. Olness , J. F. Owens

Helicity-dependent parton distribution functions at next-to-next-to-leading order accuracy from inclusive and semi-inclusive deep-inelastic scattering data

We present MAPPDFpol1.0, a new determination of the helicity-dependent parton distribution functions (PDFs) of the proton from a set of longitudinally polarised inclusive and semi-inclusive deep-inelastic scattering data. The determination…

High Energy Physics - Phenomenology · Physics 2025-04-23 MAP , Collaboration , : , Valerio Bertone , Amedeo Chiefa , Emanuele R. Nocera

NNPDF4.0 aN$^3$LO PDFs with QED corrections

We review recent progress in the global determination of the collinear parton distributions (PDFs) of the proton within the NNPDF framework. This progress includes NNPDF4.0 variants with QED effects and with missing higher order…

High Energy Physics - Phenomenology · Physics 2024-06-05 Andrea Barontini , Niccolo Laurenti , Juan Rojo

Extraction of Next-to-Next-to-Leading-Order PDFs from Lattice QCD Calculations

We present for the first time complete next-to-next-to-leading-order coefficient functions to match flavor non-singlet quark correlation functions in position space, which are calculable in lattice QCD, to parton distribution functions…

High Energy Physics - Phenomenology · Physics 2021-02-24 Zheng-Yang Li , Yan-Qing Ma , Jian-Wei Qiu

Global analysis of nuclear parton distribution functions at leading and next-to-leading order perturbative QCD

This is the introductory part of my PhD thesis which consists of two parts, the separate introduction and four published articles. The introduction begins by a technically detailed description of the DGLAP evolution and the fast numerical…

High Energy Physics - Phenomenology · Physics 2009-06-16 Hannu Paukkunen

Impact of jet-production data on the next-to-next-to-leading-order determination of HERAPDF2.0 parton distributions

The HERAPDF2.0 ensemble of parton distribution functions (PDFs) was introduced in 2015. The final stage is presented, a next-to-next-to-leading-order (NNLO) analysis of the HERA data on inclusive deep inelastic $ep$ scattering together with…

High Energy Physics - Experiment · Physics 2021-12-03 H1 , ZEUS Collaborations , : , I. Abt , R. Aggarwal , V. Andreev , M. Arratia , V. Aushev , A. Baghdasaryan , A. Baty , K. Begzsuren , O. Behnke , A. Belousov , A. Bertolin , I. Bloch , V. Boudry , G. Brandt , I. Brock , N. H. Brook , R. Brugnera , A. Bruni , A. Buniatyan , P. J. Bussey , L. Bystritskaya , A. Caldwell , A. J. Campbell , K. B. Cantun Avila , C. D. Catterall , K. Cerny , V. Chekelian , Z. Chen , J. Chwastowski , J. Ciborowski , R. Ciesielski , J. G. Contreras , A. M. Cooper-Sarkar , M. Corradi , L. Cunqueiro Mendez , J. Currie , J. Cvach , J. B. Dainton , K. Daum , R. K. Dementiev , A. Deshpande , C. Diaconu , S. Dusini , G. Eckerlin , S. Egli , E. Elsen , L. Favart , A. Fedotov , J. Feltesse , J. Ferrando , M. Fleischer , A. Fomenko , B. Foster , C. Gal , E. Gallo , D. Gangadharan , A. Garfagnini , J. Gayler , A. Gehrmann-De Ridder , T. Gehrmann , A. Geiser , L. K. Gladilin , E. W. N. Glover , L. Goerlich , N. Gogitidze , Yu. A. Golubkov , M. Gouzevitch , C. Grab , T. Greenshaw , G. Grindhammer , G. Grzelak , C. Gwenlan , D. Haidt , R. C. W. Henderson , J. Hladký , D. Hochman , D. Hoffmann , R. Horisberger , T. Hreus , F. Huber , A. Huss , P. M. Jacobs , M. Jacquet , T. Janssen , N. Z. Jomhari , A. W. Jung , H. Jung , I. Kadenko , M. Kapichine , U. Karshon , J. Katzy , P. Kaur , C. Kiesling , R. Klanner , M. Klein , U. Klein , C. Kleinwort , H. T. Klest , R. Kogler , I. A. Korzhavina , P. Kostka , N. Kovalchuk , J. Kretzschmar , D. Krücker , K. Krüger , M. Kuze , M. P. J. Landon , W. Lange , P. Laycock , S. H. Lee , B. B. Levchenko , S. Levonian , A. Levy , W. Li , J. Lin , K. Lipka , B. List , J. List , B. Lobodzinski , B. Löhr , E. Lohrmann , O. R. Long , A. Longhin , F. Lorkowski , O. Yu. Lukina , I. Makarenko , E. Malinovski , J. Malka , H. -U. Martyn , S. Masciocchi , S. J. Maxfield , A. Mehta , A. B. Meyer , J. Meyer , S. Mikocki , V. M. Mikuni , M. M. Mondal , T. Morgan , A. Morozov , K. Mueller , B. Nachman , K. Nagano , J. D. Nam , Th. Naumann , P. R. Newman , C. Niebuhr , J. Niehues , G. Nowak , J. E. Olsson , Yu. Onishchuk , D. Ozerov , S. Park , C. Pascaud , G. D. Patel , E. Paul , E. Perez , A. Petrukhin , I. Picuric , I. Pidhurskyi , J. Pires , D. Pitzl , R. Polifka , A. Polini , S. Preins , M. Przybycień , A. Quintero , K. Rabbertz , V. Radescu , N. Raicevic , T. Ravdandorj , P. Reimer , E. Rizvi , P. Robmann , R. Roosen , A. Rostovtsev , M. Rotaru , M. Ruspa , D. P. C. Sankey , M. Sauter , E. Sauvan , S. Schmitt , B. A. Schmookler , U. Schneekloth , L. Schoeffel , A. Schöning , T. Schörner-Sadenius , F. Sefkow , I. Selyuzhenkov , M. Shchedrolosiev , L. M. Shcheglova , S. Shushkevich , I. O. Skillicorn , W. Słomiński , A. Solano , Y. Soloviev , P. Sopicki , D. South , V. Spaskov , A. Specka , L. Stanco , M. Steder , N. Stefaniuk , B. Stella , U. Straumann , C. Sun , B. Surrow , M. R. Sutton , T. Sykora , P. D. Thompson , K. Tokushuku , D. Traynor , B. Tseepeldorj , Z. Tu , O. Turkot , T. Tymieniecka , A. Valkárová , C. Vallée , P. Van Mechelen , A. Verbytskyi , W. A. T. Wan Abdullah , D. Wegener , K. Wichmann , M. Wing , E. Wünsch , S. Yamada , Y. Yamazaki , J. Žáček , A. F. Żarnecki , O. Zenaiev , J. Zhang , Z. Zhang , R. Žlebčík , H. Zohrabyan , F. Zomer

xFitter 2.0.0: An Open Source QCD Fit Framework

xFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton for many different kinds of analyses in Quantum Chromodynamics (QCD). xFitter version 2.0.0 has…

High Energy Physics - Phenomenology · Physics 2017-12-04 V. Bertone , M. Botje , D. Britzger , S. Camarda , A. Cooper-Sarkar , F. Giuli , A. Glazov , A. Luszczak , F. Olness , R. Placakyte , V. Radescu , W. Słomiński , O. Zenaiev

A simple model for PDFs and nPDFs

We present the main results of our recent papers, where we derived an analytical solution of the QCD evolution equations for parton distribution functions. The valence and non-singlet quark components satisfy the Gross-Llewellyn-Smith and…

High Energy Physics - Phenomenology · Physics 2025-10-24 A. V. Kotikov , A. V. Lipatov

Parton distribution functions from the precise NNLO QCD fit

We report the parton distribution functions (PDFs) determined from the NNLO QCD analysis of the world inclusive DIS data with account of the precise NNLO QCD corrections to the evolution equations kernel. The value of strong coupling…

High Energy Physics - Phenomenology · Physics 2009-11-11 S. Alekhin

The Role of Different Schemes in the QCD Analysis and Determination of the Strong Coupling

In this article, we present a Next-to-Leading Order (NLO) QCD analysis to study the role and influence of different schemes on simultaneous determination of the Parton Distribution Functions (PDFs) and strong coupling, $\alpha_s(M^2_Z)$. We…

High Energy Physics - Phenomenology · Physics 2017-09-26 A. Vafaee , A. N. Khorramian

Machine Learning tools for global PDF fits

The use of machine learning algorithms in theoretical and experimental high-energy physics has experienced an impressive progress in recent years, with applications from trigger selection to jet substructure classification and detector…

High Energy Physics - Phenomenology · Physics 2018-09-13 Juan Rojo

Exploring the substructure of nucleons and nuclei with machine learning

Perturbative quantum chromodynamics (QCD) ceases to be applicable at low interaction energies due to the rapid increase of the strong coupling. In that limit, the non-perturbative regime determines the properties of quarks and gluons…

High Energy Physics - Phenomenology · Physics 2021-10-06 Rabah Abdul Khalek

Fant\^omas4QCD: pion PDFs with epistemic uncertainties

In these proceedings, we reiterate and extend the discussion of the Next-to-Leading Order (NLO) QCD analysis of the charged pion Parton Distribution Function (PDF) obtained within the Fant\^omas4QCD framework. The goal of the Fant\^omas…

High Energy Physics - Phenomenology · Physics 2024-08-06 Aurore Courtoy , Lucas Kotz , Pavel Nadolsky , Fred Olness , Maximiliano Ponce-Chavez

Nuclear PDFs at NLO - status report and review of the EPS09 results

We review the current status of the global DGLAP analysis of nuclear parton distribution functions, nPDFs, focusing on the recent EPS09 analysis, whose output, EPS09NLO, is the best-constrained NLO nPDF set on the market. Collinear…

High Energy Physics - Phenomenology · Physics 2015-05-20 K. J. Eskola , H. Paukkunen , C. A. Salgado

New results in the CTEQ-TEA global analysis of parton distributions in the nucleon

This report summarizes the latest developments in the CTEQ-TEA global analysis of parton distribution functions (PDFs) in the nucleon. The focus is on recent NNLO fits to high-precision LHC data at 8 and 13 TeV, including Drell-Yan, jet,…

High Energy Physics - Phenomenology · Physics 2024-11-26 A. Ablat , A. Courtoy , S. Dulat , M. Guzzi , T. J. Hobbs , T. -J. Hou , J. Huston , K. Mohan , H. -W. Lin , P. Nadolsky , I. Sitiwaldi , K. Xie , M. Yan , C. -P. Yuan

Transversity PDFs of the proton from lattice QCD with physical quark masses

We present a lattice QCD calculation of the transversity isovector- and isoscalar-quark parton distribution functions (PDFs) of the proton utilizing a perturbative matching at next-to-leading-order (NLO) accuracy. Additionally, we determine…

High Energy Physics - Lattice · Physics 2024-03-25 Xiang Gao , Andrew D. Hanlon , Swagato Mukherjee , Peter Petreczky , Qi Shi , Sergey Syritsyn , Yong Zhao

The QCD Splitting Functions at Three Loops: Methods and Results

We have computed the complete next-to-next-to-leading order (NNLO) contributions to the splitting functions governing the evolution of unpolarized parton densities in perturbative QCD. Our results agree with all partial results available in…

High Energy Physics - Phenomenology · Physics 2009-11-10 S. Moch , J. A. M. Vermaseren , A. Vogt

QCD analysis of polarized DIS and the SIDIS asymmetry world data and light sea-quark decomposition

The results of our new QCD analysis of helicity parton distributions of the nucleon at full next-to-leading order (NLO) accuracy in the fixed-flavor number scheme will be presented. Performing a combined QCD fit on the global sets of latest…

High Energy Physics - Phenomenology · Physics 2014-02-12 Fatemeh Arbabifar , Ali N. Khorramian , Maryam Soleymaninia