Hadronic width of the Z from a global fit to e sup + e sup minus r arrow hadrons data

Journal Article · Mon Dec 24 04:00:00 EST 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.65.3237· OSTI ID:5827460

Branchina, V ^[1]; Castorina, P; Consoli, M; Zappala, D ^[2]

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1. Istituto Nazionale Fisica Nucleare, Sezione di Catania, Catania (Italy)
2. Dipartimento di Fisica, Universita di Catania, Catania (Italy) Istituto Nazionale Fisica Nucleare, Sezione di Catania, Catania (Italy)

A global analysis of the {ital e}{sup +}{ital e}{sup {minus}}{r arrow}hadrons data is presented to extract an effective value for the strong-interaction correction to the quark-parton-model approximation to be used for the {ital Z} hadronic width. We obtain {Gamma}{sub {ital h}}=1782{plus minus}17(fit){plus minus}15 (electroweak (EW) theory) MeV, and a ratio {Gamma}{sub {ital h}}/{Gamma}{sub {ital l}}=21.32{plus minus}0.24, in good agreement with the results from the CERN collider LEP, and different from the two-loop QCD predictions, {Gamma}{sub {ital h}}=1735{plus minus}6({alpha}{sub {ital s}}){plus minus}15(EW theory) MeV and {Gamma}{sub {ital h}}/{Gamma}{sub {ital l}}=20.74{plus minus}0.12, corresponding to {Lambda}{sub M{bar S}}{sup (5)}=140{sub {minus}80}{sup +100} MeV, where M{bar S} denotes the modified minimal-subtraction scheme.

• OSTI ID: 5827460
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:26; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

645202 -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Electromagnetic Interactions & Properties
645203* -- High Energy Physics-- Particle Interactions & Properties-Theoretical-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CORRECTIONS
DATA ANALYSIS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FIELD THEORIES
HADRONIC PARTICLE DECAY
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTON-LEPTON INTERACTIONS
LEVEL WIDTHS
MASS
PARAMETRIC ANALYSIS
PARTICLE DECAY
PARTICLE INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RADIATIVE CORRECTIONS
Z NEUTRAL BOSONS