# EPS-HEP2019

10-17 July 2019
Ghent
Europe/Brussels timezone

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

12 Jul 2019, 17:45
15m
Campus Ledeganck - Aud. 3 (Ghent)

### Campus Ledeganck - Aud. 3

#### Ghent

Parallel talk Top and Electroweak Physics

### Speakers

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

### Description

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)