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LEP1 measurement of heavy quark forward-backward asymmetries with Opal detector; Mesure de l`asymetrie avant-arriere des quarks lourds a LEP1 avec le detecteur Opal

Abstract

Using all data collected by OPAL during the first phase of LEP operation, called LEP1, we have measured the b and c quark forward-backward asymmetries on and around the Z{sup 0} peak. The measurement, which is based on prompt leptons produced in semileptonic decays of heavy quarks, has been optimized using artificial neural networks whenever necessary, that is whenever the problem to solve implied taking into account simultaneously a large number of parameters. Our results are compatible with other LEP measurements and with the Standard Model predictions for a top quark of 174{+-}31 GeV/c{open_square} and a Higgs boson mass between 60 and 1000 GeV/c{open_square}. (author). 159 refs., 88 figs., 37 tabs.
Authors:
Publication Date:
Apr 30, 1996
Product Type:
Thesis/Dissertation
Report Number:
CEA-DAPNIA-SPP-96-1001
Reference Number:
SCA: 662430; 662440; 662120; PA: AIX-28:032193; EDB-97:058446; NTS-97:012195; SN: 97001766038
Resource Relation:
Other Information: TH: These (D. es Sc.).; PBD: 30 Apr 1996
Subject:
66 PHYSICS; B QUARKS; ASYMMETRY; C QUARKS; ALGORITHMS; ARTIFICIAL INTELLIGENCE; FLAVOR MODEL; HIGGS BOSONS; LEP STORAGE RINGS; LEPTONIC DECAY; MUONS; NEURAL NETWORKS; STANDARD MODEL; Z NEUTRAL BOSONS
OSTI ID:
455105
Research Organizations:
CEA Centre d`Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d`Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l`Instrumentation Associee; Paris-7 Univ., 75 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE97621203; TRN: FR9603324032193
Availability:
INIS; OSTI as DE97621203
Submitting Site:
FRN
Size:
244 p.
Announcement Date:
Apr 17, 1997

Citation Formats

Lafoux, H. LEP1 measurement of heavy quark forward-backward asymmetries with Opal detector; Mesure de l`asymetrie avant-arriere des quarks lourds a LEP1 avec le detecteur Opal. France: N. p., 1996. Web.
Lafoux, H. LEP1 measurement of heavy quark forward-backward asymmetries with Opal detector; Mesure de l`asymetrie avant-arriere des quarks lourds a LEP1 avec le detecteur Opal. France.
Lafoux, H. 1996. "LEP1 measurement of heavy quark forward-backward asymmetries with Opal detector; Mesure de l`asymetrie avant-arriere des quarks lourds a LEP1 avec le detecteur Opal." France.
@misc{etde_455105,
title = {LEP1 measurement of heavy quark forward-backward asymmetries with Opal detector; Mesure de l`asymetrie avant-arriere des quarks lourds a LEP1 avec le detecteur Opal}
author = {Lafoux, H}
abstractNote = {Using all data collected by OPAL during the first phase of LEP operation, called LEP1, we have measured the b and c quark forward-backward asymmetries on and around the Z{sup 0} peak. The measurement, which is based on prompt leptons produced in semileptonic decays of heavy quarks, has been optimized using artificial neural networks whenever necessary, that is whenever the problem to solve implied taking into account simultaneously a large number of parameters. Our results are compatible with other LEP measurements and with the Standard Model predictions for a top quark of 174{+-}31 GeV/c{open_square} and a Higgs boson mass between 60 and 1000 GeV/c{open_square}. (author). 159 refs., 88 figs., 37 tabs.}
place = {France}
year = {1996}
month = {Apr}
}