10-17 July 2019
Europe/Brussels timezone

Determination of electroweak parameters in polarised deep-inelastic scattering at HERA

12 Jul 2019, 17:45
Campus Ledeganck - Aud. 3 (Ghent)

Campus Ledeganck - Aud. 3


Parallel talk Top and Electroweak Physics Top and Electroweak Physics


Daniel Britzger (Deutsches Elektronen-Synchrotron (DE)) Daniel Britzger (Max-Planck-Institut für Physik München)


The parameters of the electroweak theory are determined in a combined electroweak and QCD analysis using all deep-inelastic e + p and e − p neutral current and charged current scattering cross sections published by the H1 Collaboration, including data with longitudinally polarised lepton beams. The mass of the W boson in the on-shell scheme is determined as $m_W = 80.520\pm 0.115$ GeV. The axial-vector and vector couplings of the light quarks to the Z boson are also determined. Both results improve the precision of previous H1 determinations based on HERA-I data by about a factor of two. Possible scale dependence of the weak coupling parameters in both neutral and charged current interactions beyond the Standard Model is also studied. All results are found to be consistent with the Standard Model expectations.

Eur.Phys.J.C78 (2018), 777 [arxiv:1806.01176]

Primary authors

Stefan Schmitt (Deutsches Elektronen-Synchrotron (DE)) Sergey Levonian (Deutsches Elektronen-Synchrotron (DE)) Hubert Spiesberger (Mainz University) Collaboration H1 (DESY)

Presentation Materials