Published August 1991 | Version v1
Report Restricted

S-matrix approach to the Z line shape

Creators

  • 1. Institut fuer Hochenergiephysik, Zeuthen (Germany)
  • 2. Technische Hochschule Aachen (Germany). 3. Physikalisches Inst. A

Description

We analyze the Z line shape assuming the existence of an analytic, unitary S-matrix. From hadron production at LEP, we determine MZ=91.134±0.020±0.020(LEP) GeV, ΓZ=2.506±0.018 GeV. This is accordance with earlier results after performing a shift of the Z mass value of about 1/2ΓZ2/MZ=34 MeV. The cross section and related observables may be described by a small number of additional degrees of freedom without relying on a specific field-theoretic model. With available data, the experimental error for MZ could be lowered using some electroweak model. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

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Additional details

Publishing Information

Imprint Pagination
11 p.
Report number
PHE--91-10

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
23028794
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ANGULAR DISTRIBUTION; ANNIHILATION; ASYMMETRY; DEGREES OF FREEDOM; ELECTRON-POSITRON INTERACTIONS; ENERGY DEPENDENCE; EXCITATION FUNCTIONS; FERMIONS; GEV RANGE 10-100; HELICITY; NEUTRAL-CURRENT INTERACTIONS; PAIR PRODUCTION; PARTICLE WIDTHS; POLARIZATION-ASYMMETRY RATIO; POLARIZED PRODUCTS; REST MASS; S MATRIX; SPIN ORIENTATION; THEORETICAL DATA; WEAK PARTICLE DECAY; WEINBERG LEPTON MODEL; Z NEUTRAL BOSONS
Descriptors DEC
BOSONS; DATA; DECAY; DISTRIBUTION; ELEMENTARY PARTICLES; ENERGY RANGE; FIELD THEORIES; GEV RANGE; INFORMATION; INTERACTIONS; INTERMEDIATE BOSONS; INTERMEDIATE VECTOR BOSONS; LEPTON-LEPTON INTERACTIONS; MASS; MATHEMATICAL MODELS; MATRICES; NUMERICAL DATA; ORIENTATION; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; QUANTUM FIELD THEORY; UNIFIED GAUGE MODELS