dc.contributor.author Serenkova, IA dc.contributor.author Osland, Per dc.contributor.author Pankov, Alexander A dc.date.accessioned 2020-07-03T12:09:16Z dc.date.available 2020-07-03T12:09:16Z dc.date.issued 2019 dc.Published Serenkova, Osland P, Pankov AA. Improved bounds on W−W′ mixing with ATLAS resonant WZ production data at the LHC at √s=13  TeV. Physical Review D. 2019;100(1):015007 eng dc.identifier.issn 2470-0010 en_US dc.identifier.issn 2470-0029 en_US dc.identifier.uri https://hdl.handle.net/1956/23320 dc.description.abstract New charged vector bosons W ′ decaying into gauge boson pairs W Z are predicted in many scenarios of new physics, including models with an extended gauge sector (EGM). Due to the large variety of models (other unification groups, models with supersymmetry, little Higgs models, extra dimensions) the more general EGM approach is here considered. For what concerns W ′ -production, these models are parametrized by two parameters, the W ′ mass M W ′ and the W − W ′ mixing parameter ξ . The diboson W Z production allows to place stringent constraints on this mixing angle and the W ′ mass, which we determine and present for the first time by using data from p p collisions at √ s = 13     TeV recorded by the ATLAS detector at the CERN LHC, with integrated luminosity of 36.1     fb − 1 . By comparing the experimental limits to the theoretical predictions for the total cross section of W ′ resonant production and its subsequent decay into W Z pairs, we show that the derived constraints on the mixing angle are rather severe, between 10 − 4 and 10 − 3 , i.e., greatly improved with respect to those derived from the global analysis of electroweak data which yield ξ ≲ 10 − 2 . We combine the limits derived from W Z production data with those obtained from the W ′ → e ν process in order to significantly extend the exclusion region in the M W ′ − ξ parameter plane and obtain the most stringent exclusion limits to date. We present the combined allowed parameter space for the EGM W ′ boson after incorporating indirect constraints from low energy electroweak data, direct search constraints from Tevatron and from the LHC Run I with 7 and 8 TeV as well as at Run II with 13 TeV data. en_US dc.language.iso eng eng dc.publisher APS en_US dc.rights Attribution CC BY eng dc.rights.uri http://creativecommons.org/licenses/by/4.0 eng dc.title Improved bounds on W−W′ mixing with ATLAS resonant WZ production data at the LHC at √s=13  TeV en_US dc.type Peer reviewed dc.type Journal article dc.date.updated 2020-01-23T16:45:07Z dc.description.version publishedVersion en_US dc.identifier.doi https://doi.org/10.1103/physrevd.100.015007 dc.identifier.cristin 1736130 dc.source.journal Physical Review D
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