Published September 24, 1979 | Version v1
Journal article Metadata-only

Study of electron-positron collisions at center-of-mass energies of 27.4 and 27.7 GeV at PETRA

Creators

  • 1. III. Physikalisches Institut Technische Hochschule, Aachen, West Germany

Description

This paper reports on the first results of the study of e+e- collisions at √s=27.4 GeV and √s=27.7 GeV at PETRA, using the 4π-sr electromagnetic and calorimetric detector MARK-J. We obtain an average R=sigma (e+e- → hadrons)/sigma (e+e- → μ+μ-) =3.8 +- 0.3 (statistical) +- 0.6 (systematic) and a relative R=1.0 +- 0.2 between the two energies. The R values, the measured thrust distribution, and average spherocity show no evidence for the production of new quark flavors

Additional details

Publishing Information

Journal Title
Phys. Rev. Lett.
Journal Volume
43
Journal Issue
13
Series
Phys. Rev. Lett.
Journal Page Range
901-903
ISSN
0031-9007

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
11515971
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ANNIHILATION; CHERENKOV COUNTERS; ELECTRON-POSITRON INTERACTIONS; GEV RANGE 10-100; HADRONS; MONTE CARLO METHOD; PARTICLE PRODUCTION; PETRA STORAGE RING; PROBABILITY; QUARK MODEL; TOTAL CROSS SECTIONS
Descriptors DEC
COMPOSITE MODELS; CROSS SECTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; GEV RANGE; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MATHEMATICAL MODELS; MEASURING INSTRUMENTS; PARTICLE INTERACTIONS; PARTICLE MODELS; RADIATION DETECTORS; STORAGE RINGS