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Please use this identifier to cite or link to this item: https://elib.bsu.by/handle/123456789/220296
Title: Model-Independent Constraints on Abelian Z ′ Couplings within the ATLAS Data on Dilepton Production Processes at √ s = 13 TeV
Authors: Pevzner, A. O.
Skalozub, V. V.
Gulov, A. V.
Pankov, A. A.
Keywords: ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика
Issue Date: 2018
Publisher: Minsk : Education and Upbringing
Citation: Nonlinear Phenomena in Complex Systems. - 2018. - Vol. 21, N 1. - P. 21 - 29
Abstract: Study of lepton pair production is a powerful test of the Standard Model (SM) and can be used to search for phenomena beyond the SM. New heavy neutral bosons Z ′ decaying to charged lepton pairs l +l − (l = e, µ) are predicted by many scenarios of new physics, including models with extended gauge sector. We estimate the LHC Z ′ discovery potential with Run 2 data comprised of 36.1 fb−1 of pp collisions at √ s = 13 TeV and recorded by ATLAS detector at the CERN LHC. The model-independent constraints on Z ′ fermion couplings were obtained for the first time for a selected set of Z ′ signal mass points of MZ′ = 2, 3, and 4 TeV by using the ATLAS data collected at the LHC. The analysis is based on the derived earlier special relations between the Z ′ couplings proper to the renormalizable theories. Taking into account the dependence of Z − Z ′ mixing angle θ0 on Z ′ axial-vector coupling a, the limits on θ0 are established as θ0 < 10−4 − 10−3 in the investigated Z ′ mass range.
URI: http://elib.bsu.by/handle/123456789/220296
ISSN: 1561-4085
Licence: info:eu-repo/semantics/restrictedAccess
Appears in Collections:2018. Volume 21. Number 1

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