https://doi.org/10.1140/epjc/s10052-020-8075-7
Regular Article - Theoretical Physics
High-precision limits on W–
and Z–
mixing from diboson production using the full LHC Run 2 ATLAS data set
1
The Abdus Salam ICTP Affiliated Centre, Technical University of Gomel, 246746, Gomel, Belarus
2
Institute for Nuclear Problems, Belarusian State University, 220030, Minsk, Belarus
3
Joint Institute for Nuclear Research, Dubna, 141980, Russia
4
Department of Physics and Technology, University of Bergen, Postboks 7803, 5020, Bergen, Norway
* e-mail: Per.Osland@uib.no
Received:
10
December
2019
Accepted:
23
May
2020
Published online:
5
June
2020
The full ATLAS Run 2 data set with time-integrated luminosity of 
in the diboson channels in hadronic final states is used to probe a simple model with an extended gauge sector (EGM), proposed by Altarelli et al., and often taken as a convenient benchmark by experimentalists. This model accommodates new charged and neutral vector bosons with modified trilinear Standard Model gauge couplings, decaying into electroweak gauge boson pairs WZ or WW, where W/Z decay hadronically. Exclusion limits at the 95% CL on the and resonance production cross section times branching ratio to electroweak gauge boson pairs in the mass range of 
1–5 TeV are here converted to constraints on W– and Z– mixing parameters and masses for the EGM. We present exclusion regions on the parameter space of the and by using the full Run 2 data set comprised of pp collisions at 
and recorded by the ATLAS detector at the CERN LHC. The obtained exclusion regions are significantly extended compared to those obtained from the previous analysis performed with Tevatron data as well as with LHC data collected at 7 and 8 TeV in Run 1 and are the most stringent bounds to date.
© The Author(s), 2020
