Z sup 0 parameters and M sup top from LEP 1990 data

Journal Article · Fri Apr 10 04:00:00 EDT 1992 · International Journal of Modern Physics A; (United States)

DOI:https://doi.org/10.1142/S0217751X92000806· OSTI ID:5168097

Banerjee, S; Ganguli, S N; Gurtu, A ^[1]

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1. Tata Inst. of Fundamental Research, Bombay 400005 (IN)

This paper reports on the four detectors ALEPH, DELPHI, L3 and OPAL which ave collected {approx}550,000 Z{sup 0} decays during the LEP run in 1990. The authors have made model-independent simultaneous fits to the LEP data to determine the Z{sup 0} parameters. The mass and widths of Z{sup 0} are M{sub z} = 91.77 {plus minus} 0.006 {plus minus} 0.02 (LEP) GeV, {Gamma}{sub z} = 2.481 {plus minus} 0.010 GeV. {Gamma}{sub had} = 1.734 {plus minus} 0.010 GeV and {Gamma}{sub lept} = 83.0 {plus minus} 0.4 MeV. The number of v families is determined to be N{sub v} = 3.01 {plus minus} 0.05. Simultaneous fits are performed within the Standard Model framework to the LEP data and constraining the value of sin{sup 2} {theta}{sub w} from the {bar p}p colliders the authors get the following values for top mass, electroweak mixing angle sin{sup 2} {theta}{sub w} and the radiative correction {delta}r: M{sub top} = 123 {sup +33}{sub {minus}38} {plus minus} 19 (Higgs) GeV, sin{sup 2} {theta}{sub w} = 0.230 {plus minus} 0.004 and {delta}r = 0.056 {plus minus} 0.011.

• OSTI ID: 5168097
• Journal Information: International Journal of Modern Physics A; (United States), Journal Name: International Journal of Modern Physics A; (United States) Vol. 7:9; ISSN 0217-751X; ISSN IMPAE
• Country of Publication: United States
• Language: English

Related Subjects

662210 -- Specific Theories & Interaction Models
662380* -- Decays of Intermediate Bosons-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYON-BARYON INTERACTIONS
BOSONS
CORRECTIONS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FIELD THEORIES
GEV RANGE
GEV RANGE 01-10
GEV RANGE 10-100
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEP STORAGE RINGS
MASS SPECTRA
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MIXING RATIO
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PARTICLE WIDTHS
POSTULATED PARTICLES
PROTON-ANTIPROTON INTERACTIONS
Pa
Particle Systematics-- Unified Theories & Models-- (1992-)
RADIATION DETECTORS
RADIATIVE CORRECTIONS
SIMULATION
SPECTRA
STANDARD MODEL
STORAGE RINGS
TOP PARTICLES
UNIFIED GAUGE MODELS
UNIFIED-FIELD THEORIES
WEINBERG-SALAM GAUGE MODEL
Z NEUTRAL BOSONS