Статья

PDF4LHC recommendations for LHC Run II

J. M. ButterworthDepartment of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UKStefano CarrazzaTIF Lab, Dipartimento di Fisica, Università di Milano and INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, ItalyA. M. Cooper-SarkarParticle Physics, Department of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, UKA. De RoeckAntwerp University, B2610 Wilrijk, BelgiumJoël FeltesseCEA, DSM/IRFU, CE-Saclay, Gif-sur-Yvette, FranceStefano ForteTIF Lab, Dipartimento di Fisica, Università di Milano and INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, ItalyJun GaoHigh Energy Physics Division, Argonne National Laboratory, Argonne, IL-60439, USASasha GlazovDeutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, D-22607 Hamburg, GermanyJ. HustonDepartment of Physics and Astronomy, Michigan State University, East Lansing, MI 48824 USAZahari KassabovTIF Lab, Dipartimento di Fisica, Università di Milano and INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, ItalyR. McNultySchool of Physics, University College Dublin Science Centre North, UCD Belfeld, Dublin 4, IrelandA. MorschPH Department, CERN, CH-1211 Geneva 23, SwitzerlandPavel NadolskyDepartment of Physics, Southern Methodist University, Dallas, TX 75275-0181, USAV. RadescuPhysikalisches Institut, Universität Heidelberg, Heidelberg, GermanyJuan RojoRudolf Peierls Centre for Theoretical Physics, 1 Keble Road, University of Oxford, OX1 3NP Oxford, UKR. S. ThorneDepartment of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK

2016en

ABI

Аннотация

We provide an updated recommendation for the usage of sets of parton distribution functions (PDFs) and the assessment of PDF and PDF+${\alpha }_{s}$ uncertainties suitable for applications at the LHC Run II. We review developments since the previous PDF4LHC recommendation, and discuss and compare the new generation of PDFs, which include substantial information from experimental data from the Run I of the LHC. We then propose a new prescription for the combination of a suitable subset of the available PDF sets, which is presented in terms of a single combined PDF set. We finally discuss tools which allow for the delivery of this combined set in terms of optimized sets of Hessian eigenvectors or Monte Carlo replicas, and their usage, and provide some examples of their application to LHC phenomenology. This paper is dedicated to the memory of Guido Altarelli (1941–2015), whose seminal work made possible the quantitative study of PDFs.

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Идентификаторы

DOI: 10.1088/0954-3899/43/2/023001

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