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

0501568 - FZÚ 2019 RIV DE eng J - Článek v odborném periodiku
Andreev, V. - Baghdasaryan, A. - Begzsuren, K. - Cvach, Jaroslav - Hladký, Jan - Reimer, Petr … celkem 135 autorů
Determination of electroweak parameters in polarised deep-inelastic scattering at HERA.
European Physical Journal C. Roč. 78, č. 9 (2018), s. 1-23, č. článku 777. ISSN 1434-6044. E-ISSN 1434-6052
Institucionální podpora: RVO:68378271
Klíčová slova: electroweak theory * deep inelastic scattering * mass of W boson
Obor OECD: Particles and field physics
Impakt faktor: 4.843, rok: 2018

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. Various fits to Standard Model parameters in the on-shell scheme are performed. The mass of the W boson is determined as mW = 80.520 +- 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.

Trvalý link: http://hdl.handle.net/11104/0293572