Abstract
Recent experimental results from LEP on strong interactions using heavy quarks are reviewed. By identifying bottom and charm decays, a model independent evidence for the string effect has been found together with a softer fragmentation function of gluons compared to quarks. The comparison of jet properties and the value of the strong coupling constant {alpha}{sub s} in bottom events and average events provides evidence for the flavour independence of QCD: {alpha}{sup b0tt0m}{sub s}/{alpha}{sub s}{sup udsc} = 1.00 {+-} 0.05 {+-} 0.06. The average scaled energy of charmed and bottom hadrons at Z{sup 0} energies is found to be <{chi}sub(D{sup +})> = 0.507{sup +0.012}{sub -0.015} {+-} 0.010 <{chi}sub(b{yields}l)> = 0.705 {+-} 0,008 {+-} 0.010. A comparison with results at lower c.m. energies exhibits significant scaling violations. These are interpreted in the context of various QCD calculations. (orig.).
Citation Formats
Maettig, P.
QCD measurements with heavy quarks at LEP.
Germany: N. p.,
1991.
Web.
Maettig, P.
QCD measurements with heavy quarks at LEP.
Germany.
Maettig, P.
1991.
"QCD measurements with heavy quarks at LEP."
Germany.
@misc{etde_10114353,
title = {QCD measurements with heavy quarks at LEP}
author = {Maettig, P}
abstractNote = {Recent experimental results from LEP on strong interactions using heavy quarks are reviewed. By identifying bottom and charm decays, a model independent evidence for the string effect has been found together with a softer fragmentation function of gluons compared to quarks. The comparison of jet properties and the value of the strong coupling constant {alpha}{sub s} in bottom events and average events provides evidence for the flavour independence of QCD: {alpha}{sup b0tt0m}{sub s}/{alpha}{sub s}{sup udsc} = 1.00 {+-} 0.05 {+-} 0.06. The average scaled energy of charmed and bottom hadrons at Z{sup 0} energies is found to be <{chi}sub(D{sup +})> = 0.507{sup +0.012}{sub -0.015} {+-} 0.010 <{chi}sub(b{yields}l)> = 0.705 {+-} 0,008 {+-} 0.010. A comparison with results at lower c.m. energies exhibits significant scaling violations. These are interpreted in the context of various QCD calculations. (orig.).}
place = {Germany}
year = {1991}
month = {Oct}
}
title = {QCD measurements with heavy quarks at LEP}
author = {Maettig, P}
abstractNote = {Recent experimental results from LEP on strong interactions using heavy quarks are reviewed. By identifying bottom and charm decays, a model independent evidence for the string effect has been found together with a softer fragmentation function of gluons compared to quarks. The comparison of jet properties and the value of the strong coupling constant {alpha}{sub s} in bottom events and average events provides evidence for the flavour independence of QCD: {alpha}{sup b0tt0m}{sub s}/{alpha}{sub s}{sup udsc} = 1.00 {+-} 0.05 {+-} 0.06. The average scaled energy of charmed and bottom hadrons at Z{sup 0} energies is found to be <{chi}sub(D{sup +})> = 0.507{sup +0.012}{sub -0.015} {+-} 0.010 <{chi}sub(b{yields}l)> = 0.705 {+-} 0,008 {+-} 0.010. A comparison with results at lower c.m. energies exhibits significant scaling violations. These are interpreted in the context of various QCD calculations. (orig.).}
place = {Germany}
year = {1991}
month = {Oct}
}