Status of the Standard Model

PAUL LANGACKER

doi:10.1111/j.1749-6632.1993.tb43885.x

Status of the Standard Model

PAUL LANGACKER

Physics

Research output: Contribution to journal › Article › peer-review

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, α_s (M_Z), and grand unification are discussed. A fit to all data yields sin²θ_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_sm²_t) corrections, these values increase by ∼ 5 GeV.

Original language	English (US)
Pages (from-to)	34-54
Number of pages	21
Journal	Annals of the New York Academy of Sciences
Volume	688
Issue number	1
DOIs	https://doi.org/10.1111/j.1749-6632.1993.tb43885.x
State	Published - Jun 1993

All Science Journal Classification (ASJC) codes

General Biochemistry, Genetics and Molecular Biology
General Neuroscience
History and Philosophy of Science

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10.1111/j.1749-6632.1993.tb43885.x

Cite this

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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 sin2θw(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(ααsm2t) corrections, these values increase by ∼ 5 GeV.",

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Status of the Standard Model

Abstract

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