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Title: Study of inclusive muon production in e/sup +/e/sup -/ annihilation in the center of mass energy range 12 to 31. 6 GeV

Abstract

This dissertation describes an experiment which measured the inclusive production of muons with momenta greater than 1.6 GeV/c in multihadron events in e/sup +/e/sup -/ interactions in the center of mass energy range 12.0 to 31.6 GeV. The experiment was performed at the positron-electron storage ring PETRA at the Deutsches Elektronen-Synchrotron Lab in Hamburg, West Germany. The apparatus used was the PLUTO detector which is a general-purpose magnetic detector with essentially complete coverage for charged particles, photons and leptons. Muon identification was achieved by an approximately one meter thick mostly steel absorber, with arrays of planar drift chambers outside the absorber to detect penetrating particles. In the center of mass energy range 12.0 to 31.6 GeV, the measured inclusive muon production cross section is found to be consistent with a source of muons coming from semi-muonic decay of charm and bottom mesons produced in e/sup +/e/sup -/ annihilation. The larger muon production cross section expected from production and semi-muonic decay of top mesons in the standard model is not observed. The momentum spectrum of the muons was also measured for momenta greater than 1.6 GeV/C and is found to agree with predictions of the charm and bottom decay model. Amore » search for a new charged lepton heavier than the tau was also performed. In the center of mass energy range 29.9 to 31.6 GeV, no multihadron event with an isolated muon which can be attributed to the production and muonic decay of a new heavy lepton was found. A new charged sequential heavy lepton in the mass range 7 to 14 GeV/c/sup 2/ is excluded at 95% CL.« less

Authors:
Publication Date:
Research Org.:
Maryland Univ., College Park (USA)
OSTI Identifier:
6246030
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ELECTRON-POSITRON INTERACTIONS; MULTIPLE PRODUCTION; ANNIHILATION; EXPERIMENTAL DATA; GEV RANGE 10-100; INCLUSIVE INTERACTIONS; MUONS; PETRA STORAGE RING; SEMILEPTONIC DECAY; BASIC INTERACTIONS; DATA; DECAY; ELECTROMAGNETIC INTERACTIONS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; INFORMATION; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; STORAGE RINGS; WEAK PARTICLE DECAY; 645101* - High Energy Physics- Particle Interactions & Properties-Experimental- Electromagnetic Interactions & Properties

Citation Formats

Lau, K H. Study of inclusive muon production in e/sup +/e/sup -/ annihilation in the center of mass energy range 12 to 31. 6 GeV. United States: N. p., 1981. Web.
Lau, K H. Study of inclusive muon production in e/sup +/e/sup -/ annihilation in the center of mass energy range 12 to 31. 6 GeV. United States.
Lau, K H. 1981. "Study of inclusive muon production in e/sup +/e/sup -/ annihilation in the center of mass energy range 12 to 31. 6 GeV". United States.
@article{osti_6246030,
title = {Study of inclusive muon production in e/sup +/e/sup -/ annihilation in the center of mass energy range 12 to 31. 6 GeV},
author = {Lau, K H},
abstractNote = {This dissertation describes an experiment which measured the inclusive production of muons with momenta greater than 1.6 GeV/c in multihadron events in e/sup +/e/sup -/ interactions in the center of mass energy range 12.0 to 31.6 GeV. The experiment was performed at the positron-electron storage ring PETRA at the Deutsches Elektronen-Synchrotron Lab in Hamburg, West Germany. The apparatus used was the PLUTO detector which is a general-purpose magnetic detector with essentially complete coverage for charged particles, photons and leptons. Muon identification was achieved by an approximately one meter thick mostly steel absorber, with arrays of planar drift chambers outside the absorber to detect penetrating particles. In the center of mass energy range 12.0 to 31.6 GeV, the measured inclusive muon production cross section is found to be consistent with a source of muons coming from semi-muonic decay of charm and bottom mesons produced in e/sup +/e/sup -/ annihilation. The larger muon production cross section expected from production and semi-muonic decay of top mesons in the standard model is not observed. The momentum spectrum of the muons was also measured for momenta greater than 1.6 GeV/C and is found to agree with predictions of the charm and bottom decay model. A search for a new charged lepton heavier than the tau was also performed. In the center of mass energy range 29.9 to 31.6 GeV, no multihadron event with an isolated muon which can be attributed to the production and muonic decay of a new heavy lepton was found. A new charged sequential heavy lepton in the mass range 7 to 14 GeV/c/sup 2/ is excluded at 95% CL.},
doi = {},
url = {https://www.osti.gov/biblio/6246030}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1981},
month = {Thu Jan 01 00:00:00 EST 1981}
}

Thesis/Dissertation:
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