Model-independent search for the Abelian Z' boson and the LEP data

2001/07/23 by A. V. Gulov, Gulov, A. V., V. V. Skalozub +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-ph/0107236

6 pages, 1 figure, RevTeX

arxiv created 2001/07/23 · arxiv updated 2009/11/30

Abstract

Model-independent search for the Abelian Z' gauge boson virtual state based on the new observable in the processes e⁺ e^- → l⁺ l^- is analyzed for the LEP data. The observable is introduced by using following from renormalizability of an underlying theory the correlations between the parameters of the low energy effective Lagrangian and kinematics of the scattering processes. The central values of the observable are in accordance with the Z' existence, although no real signal is found at the 1σ level. Lower limits at the 95% confidence level on the corresponding contact interaction scale are derived in the range of 15.6 - 18.6 TeV. Comparisons with other fits are done.

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