Status of the Standard Model.

Abstract:

: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, αs (MZ), and grand unification are discussed. A fit to all data yields sin(2)θw(MZ)= 0.2325 ± 0.0024 (on-shell), where the uncertainties are mainly from mt. In the standard model one predicts mt (+17+15) -23-17 GeV, where the central value assumes MH± 50 GeV (-) or 1 TeV (+). In the minimal supersymmetric extension of the standard model (MSSM) one predicts mt= 138(+20) -25± 5 GeV, where the difference is due the light Higgs scalar expected in the MSSM. There is no significant constraint on MH until mt is known independently. Including perturbative estimates of the O(ααsm(2) t) corrections, these values increase by ∼ 5 GeV.

journal_name

Ann N Y Acad Sci

authors

Langacker P

doi

10.1111/j.1749-6632.1993.tb43885.x

subject

Has Abstract

pub_date

1993-06-01 00:00:00

pages

34-54

eissn

0077-8923

issn

1749-6632

journal_volume

688

pub_type

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