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  1. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
    PRD (Ed.)
    A search for heavy neutral gauge bosons ( Z ′ ) decaying into a pair of tau leptons is performed in proton-proton collisions at s = 13     TeV at the CERN LHC. The data were collected with the CMS detector and correspond to an integrated luminosity of 138     fb − 1 . The observations are found to be in agreement with the expectation from standard model processes. Limits at 95% confidence level are set on the product of the Z ′ production cross section and its branching fraction to tau lepton pairs for a range of Z ′ boson masses. For a narrow resonance in the sequential standard model scenario, a Z ′ boson with a mass below 3.5 TeV is excluded. This is the most stringent limit to date from this type of search. © 2025 CERN, for the CMS Collaboration2025CERN 
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    Free, publicly-accessible full text available June 1, 2026