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Title: The photon PDF from high-mass Drell–Yan data at the LHC

Achieving the highest precision for theoretical predictions at the LHC requires the calculation of hard-scattering cross sections that include perturbative QCD corrections up to (N)NNLO and electroweak (EW) corrections up to NLO. Parton distribution functions (PDFs) need to be provided with matching accuracy, which in the case of QED effects involves introducing the photon parton distribution of the proton, xγ(x,Q2) . In this work a determination of the photon PDF from fits to recent ATLAS measurements of high-mass Drell–Yan dilepton production at $$\sqrt{s}$$=8 TeV is presented. This analysis is based on the xFitter framework, and has required improvements both in the APFEL program, to account for NLO QED effects, and in the aMCfast interface to account for the photon-initiated contributions in the EW calculations within MadGraph5_aMC@NLO. The results are compared with other recent QED fits and determinations of the photon PDF, consistent results are found.
Authors:
 [1]
  1. Univ. of Oxford (United Kingdom)
Publication Date:
Grant/Contract Number:
sc0010129; PDF4BSM; 614577; 1320/MOB/IV/2015/0
Type:
Accepted Manuscript
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 77; Journal Issue: 6; Journal ID: ISSN 1434-6044
Publisher:
Springer
Research Org:
European Organization for Nuclear Research (CERN), Geneva (Switzerland)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); German Federal Ministry of Education and Research (BMBF); Joint Institute for Nuclear Research (JINR); European Research Council (ERC)
Contributing Orgs:
and the xFitter Developers’ team
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1424585

Giuli, F. The photon PDF from high-mass Drell–Yan data at the LHC. United States: N. p., Web. doi:10.1140/epjc/s10052-017-4931-5.
Giuli, F. The photon PDF from high-mass Drell–Yan data at the LHC. United States. doi:10.1140/epjc/s10052-017-4931-5.
Giuli, F. 2017. "The photon PDF from high-mass Drell–Yan data at the LHC". United States. doi:10.1140/epjc/s10052-017-4931-5. https://www.osti.gov/servlets/purl/1424585.
@article{osti_1424585,
title = {The photon PDF from high-mass Drell–Yan data at the LHC},
author = {Giuli, F.},
abstractNote = {Achieving the highest precision for theoretical predictions at the LHC requires the calculation of hard-scattering cross sections that include perturbative QCD corrections up to (N)NNLO and electroweak (EW) corrections up to NLO. Parton distribution functions (PDFs) need to be provided with matching accuracy, which in the case of QED effects involves introducing the photon parton distribution of the proton, xγ(x,Q2) . In this work a determination of the photon PDF from fits to recent ATLAS measurements of high-mass Drell–Yan dilepton production at $\sqrt{s}$=8 TeV is presented. This analysis is based on the xFitter framework, and has required improvements both in the APFEL program, to account for NLO QED effects, and in the aMCfast interface to account for the photon-initiated contributions in the EW calculations within MadGraph5_aMC@NLO. The results are compared with other recent QED fits and determinations of the photon PDF, consistent results are found.},
doi = {10.1140/epjc/s10052-017-4931-5},
journal = {European Physical Journal. C, Particles and Fields},
number = 6,
volume = 77,
place = {United States},
year = {2017},
month = {6}
}