Combined fit to R ( e sup + e minus r arrow hadrons) and data from the CERN e sup + e minus collider LEP

Journal Article · Wed Jul 01 04:00:00 EDT 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.46.75· OSTI ID:7277806

Branchina, V ^[1]; Consoli, M ^[2]; Fiore, R ^[3]; Zappala, D ^[1]

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

A combined fit to {ital R}({ital e}{sup +}{ital e{minus}}{r arrow}hadrons) in the range 5--61.4 GeV and to the data from the CERN {ital e}{sup +}{ital e{minus}} collider LEP is presented to obtain a global estimate of the strong-interaction scale parameter {Lambda}{sub M{bar S}}{sup (5)} free of uncertainties due to hadronization and choice of the momentum scale, where M{bar S} denotes the modified minimal subtraction scheme. Our fitted values {Lambda}{sub M{bar S}}{sup (5)}=545{sub {minus}182}{sup +221} MeV, in the range 5--94 GeV, and {Lambda}{sub M{bar S}}{sup (5)}=961{sub {minus}314}{sup +383} MeV, in the range 14--94 GeV, do not agree, within two standard deviations, with the low-energy determinations from {Upsilon} branching ratios and deep-inelastic scattering.

• OSTI ID: 7277806
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 46:1; ISSN PRVDA; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

662230* -- Quantum Chromodynamics-- (1992-)
662240 -- Models for Strong Interactions-- (1992-)
662390 -- Electromagnetic Processes & Properties-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BORN APPROXIMATION
BRANCHING RATIO
COMPOSITE MODELS
CORRECTIONS
DEEP INELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
FIELD THEORIES
GEV RANGE
GEV RANGE 01-10
GEV RANGE 10-100
HADRONS
INELASTIC SCATTERING
INTERACTIONS
LEP STORAGE RINGS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-LEPTON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PARTON MODEL
PERTURBATION THEORY
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
RADIATIVE CORRECTIONS
SCATTERING
STORAGE RINGS
STRONG INTERACTIONS