Top and Higgs hunting via M sub W and. Gamma. sub Z

Journal Article · Tue Jul 30 04:00:00 EDT 1991 · Modern Physics Letters A; (Singapore)

DOI:https://doi.org/10.1142/S0217732391002311· OSTI ID:5195524

Hioki, Z ^[1]

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1. Dept. of Physics, College of General Education, Univ. of Tokushima, Tokushima 770 (JP)

Virtual top and Higgs effects are studied through the electroweak radiative corrections to the W boson mass, M{sub W} , and the total decay-width of the Z boson, {Gamma}{sub x}, by using the data M{sup exp}{sub Z} = 91.175 {plus minus} 0.021 GeV(LEP), {Gamma}{sup exp}{sub Z} = 2.485 {plus minus} 0.009 GeV(LEP) and M{sup exp}{sub W} = 80.18 {plus minus} 0.32 GeV(CDF + UA2). Carrying out the {chi}{sup 2} fit in the framework of the standard electroweak theory, constraints are derived on the top-quark mass, m{sub t}, and the Higgs-boson mass, m{sub {phi}}, which are almost free from the complicated hadron physics like parton model calculations. For example, m{sub t} = 134{sup +47}{sub {minus}48} GeV for m{sub {phi}} = 100 GeV (at 1{sub {sigma}} level) while m{sub {phi}} {approx lt} 680 if m{sub t} {le} 110 GeV and m{sub {phi}} {approx gt} 280 GeV if m{sub t} {ge} 190 GeV. It is also studied how precise measurements of M{sub W} at LEP II improve these constraints.

• OSTI ID: 5195524
• Journal Information: Modern Physics Letters A; (Singapore), Journal Name: Modern Physics Letters A; (Singapore) Vol. 6:23; ISSN 0217-7323; ISSN MPLAE
• Country of Publication: United States
• Language: English

Related Subjects

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BOSONS
CORRECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
GEV RANGE
HIGGS BOSONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
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MASS SPECTRA
MATHEMATICAL MODELS
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PARTICLE PROPERTIES
PARTICLE WIDTHS
POSTULATED PARTICLES
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Particle Systematics-- Unified Theories & Models-- (1992-)
RADIATIVE CORRECTIONS
SPECTRA
STANDARD MODEL
STORAGE RINGS
TOP PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
VIRTUAL PARTICLES
WEINBERG-SALAM GAUGE MODEL