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New- Z ′ phenomenology

1991; American Physical Society; Volume: 43; Issue: 1 Linguagem: Inglês

10.1103/physrevd.43.r22

1538-4500

Xiao-Gang He, Gayatri Joshi, H. Lew, Raymond R. Volkas,

Particle Detector Development and Performance

We show that ${L}_{1}={L}_{e}\ensuremath{-}{L}_{\ensuremath{\mu}}$, ${L}_{2}={L}_{e}\ensuremath{-}{L}_{\ensuremath{\tau}}$, and ${L}_{3}={L}_{\ensuremath{\mu}}\ensuremath{-}{L}_{\ensuremath{\tau}}$ (where ${L}_{e,\ensuremath{\mu},\ensuremath{\tau}}$ are the family lepton numbers) are anomaly free and can thus be gauged. Three simple theories featuring a flavor-conserving second $Z$ boson (${Z}_{1,2,3}^{\ensuremath{'}}$) result. Bounds on the ${Z}_{i}^{\ensuremath{'}}$ coupling constant (${g}_{i}^{\ensuremath{'}}$) and mass are derived. The mass of ${Z}_{1}^{\ensuremath{'}}$ has a lower bound of 60-150 GeV at 90% confidence level for reasonable values of ${g}_{1}^{\ensuremath{'}}$. The mass of ${Z}_{2}^{\ensuremath{'}}$ has a best-fit value of about 60 GeV. The physics of these bosons in the KEK TRISTAN and CERN LEP window of 63-87 GeV is discussed. Constraints on ${Z}_{3}^{\ensuremath{'}}$ interactions are derived from ${(g\ensuremath{-}2)}_{\ensuremath{\mu}}$.