Jul 5 – 12, 2017
Venice, Italy
Europe/Zurich timezone
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Combined QCD and electroweak analysis of HERA data

Jul 6, 2017, 12:30 PM
Room Volpi (Palazzo del Casinò)

Room Volpi

Palazzo del Casinò

Parallel Talk Top and Electroweak Physics Top and electroweak


Claire Gwenlan (University of Oxford (GB))


A simultaneous fit of parton distribution functions (PDFs) and electroweak
parameters to HERA data on deep inelastic scattering is presented. The input
data are the neutral current and charged current inclusive cross sections
which were previously used in the QCD analysis leading to the HERAPDF2.0
PDFs. In addition, the polarisation of the electron beam was taken into
account for the ZEUS data recorded between 2004 and 2007. Results on the
vector and axial-vector couplings of the Z boson to u- and d-type quarks,
on the value of the electroweak mixing angle and the mass of the W boson
are presented. The values obtained for the electroweak parameters are in
agreement with Standard Model predictions. The resulting sets of PDFs,
ZEUS-EW, are in agreement with HERAPDF2.0 and give a good description of
ZEUS data with polarisation taken into account.

Experimental Collaboration ZEUS

Primary author

Claire Gwenlan (University of Oxford (GB))

Presentation materials