1998/09/08 by Junegone Chay, Kang Young Lee, Soo-hyeon Nam · 3 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.61.035002
published as Phys.Rev.D61:035002,2000 · 34 pages, a LaTeX file with macros elsart and pictex. 4 Figures
arxiv created 1998/09/08 · openalex publication_date 1999/12/30 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We consider phenomenological constraints on the mass M_Z^\ensuremath' and the mixing angles \ensuremathθR and \ensuremathξ of the neutral sector in general SU(2)L\ifmmode×\else\texttimes\fiSU(2)R\ifmmode×\else\texttimes\fiU(1) models using electroweak data. The analysis of the neutral sector has the advantage that it has relatively fewer parameters compared to the charged sector since the Cabibbo-Kobayashi-Maskawa matrix elements in the right-handed sector are not involved. We consider the theoretical relations between the gauge boson masses and the mixing angles. We combine the precision electroweak data from CERN LEP I and the low-energy neutral-current experimental data to constrain the parameters in the model. It turns out that M_Z^\ensuremath'>430 GeV, \ensuremath-0.00040<\ensuremathξ<0.0037, with little constraint on \ensuremathθR. Using these constraints, we compare \ensuremathσ(e+e^\ensuremath-\ensuremath→\ensuremathμ+\ensuremathμ^\ensuremath-), \ensuremathσ(e+e^\ensuremath-\ensuremath→bb), and AFBl with the experimental data at LEP II.