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arxiv: 1410.4412 · v3 · pith:UZVUBKPGnew · submitted 2014-10-16 · ✦ hep-ph

HERAFitter, Open Source QCD Fit Project

S. Alekhin , O. Behnke , P. Belov , S. Borroni , M. Botje , D. Britzger , S. Camarda , A.M. Cooper-Sarkar
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K. Daum C. Diaconu J. Feltesse A. Gizhko A. Glazov A. Guffanti M. Guzzi F. Hautmann A. Jung H. Jung V. Kolesnikov H. Kowalski O. Kuprash A. Kusina S. Levonian K. Lipka B. Lobodzinski K. Lohwasser A. Luszczak B. Malaescu R. McNulty V. Myronenko S. Naumann-Emme K. Nowak F. Olness E. Perez H. Pirumov R. Placakyte K. Rabbertz V. Radescu R. Sadykov G.P. Salam A. Sapronov A. Schoening T. Schoerner-Sadenius S. Shushkevich W. Slominski H. Spiesberger P. Starovoitov M. Sutton J. Tomaszewska O. Turkot A. Vargas G. Watt K. Wichmann
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classification ✦ hep-ph
keywords herafittermeasurementsoptionscollidersdeterminationfitsframeworkhadron
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HERAFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton and for many different kinds of analyses in Quantum Chromodynamics (QCD). It encodes results from a wide range of experimental measurements in lepton-proton deep inelastic scattering and proton-proton (proton-antiproton) collisions at hadron colliders. These are complemented with a variety of theoretical options for calculating PDF-dependent cross section predictions corresponding to the measurements. The framework covers a large number of the existing methods and schemes used for PDF determination. The data and theoretical predictions are brought together through numerous methodological options for carrying out PDF fits and plotting tools to help visualise the results. While primarily based on the approach of collinear factorisation, HERAFitter also provides facilities for fits of dipole models and transverse-momentum dependent PDFs. The package can be used to study the impact of new precise measurements from hadron colliders. This paper describes the general structure of HERAFitter and its wide choice of options.

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