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Status of the Standard Model
Author(s) -
LANGACKER PAUL
Publication year - 1993
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1993.tb43885.x
Subject(s) - physics , particle physics , electroweak interaction , higgs boson , standard model (mathematical formulation) , minimal supersymmetric standard model , scalar (mathematics) , top quark , grand unified theory , nuclear physics , supersymmetry , physics beyond the standard model , quark , geometry , mathematics , archaeology , gauge (firearms) , history
The implications of recent precision Z ‐pole, W mass, and weak neutral current data for testing the standard electroweak model, constraining that t quark and Higgs masses, α s (M Z ) , and grand unification are discussed. A fit to all data yields sin 2 θ w (M Z ) = 0.2325 ± 0.0024 (on‐shell), where the uncertainties are mainly from m t . In the standard model one predicts m t +17+15 −23–17 GeV, where the central value assumes M H ± 50 GeV (‐) or 1 TeV (+). In the minimal supersymmetric extension of the standard model (MSSM) one predicts m t = 138 +20 −25 ± 5 GeV, where the difference is due the light Higgs scalar expected in the MSSM. There is no significant constraint on M H until m t is known independently. Including perturbative estimates of the O(αα s m 2 t ) corrections, these values increase by ∼ 5 GeV.