TY - JOUR
T1 - The photon PDF from high-mass Drell Yan data at the LHC
AU - Giuli, F.
AU - team, xFitter Developers'
AU - Bertone, V.
AU - Britzger, D.
AU - Carrazza, Stefano
AU - Cooper-Sarkar, Amanda
AU - Glazov, Alexander
AU - Lohwasser, K.
AU - Luszczak, Agnieszka
AU - Olness, F.
AU - Placakyte, R.
AU - Radescu, V.
AU - Rojo, J.
AU - Sadykov, R.
AU - Shvydkin, P.
AU - Zenaiev, Oleksandr
AU - Lisovyi, Mykhailo
N1 - 20 pages, 13 figures, to be submitted to JHEP
PY - 2017/1/30
Y1 - 2017/1/30
N2 - 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 √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.
AB - 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 √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.
KW - hep-ph
UR - http://www.scopus.com/inward/record.url?scp=85021112405&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85021112405&partnerID=8YFLogxK
U2 - 10.1140/epjc/s10052-017-4931-5
DO - 10.1140/epjc/s10052-017-4931-5
M3 - Article
SN - 1434-6044
VL - 77
SP - 1
EP - 15
JO - European Physical Journal C. Particles and Fields
JF - European Physical Journal C. Particles and Fields
IS - 6
M1 - 400
ER -