Showing 2 of 2 results
The hadronic final states observed with the ALEPH detector at LEP in ${\rm e}^ + {\rm e}^-$ annihilation
Mean charged particle multiplicities at different c.m. energies.
XP distribution at c.m. energy 133.0 GeV.
XP distribution at c.m. energy 161.0 GeV.
XP distribution at c.m. energy 172.0 GeV.
XP distribution at c.m. energy 183.0 GeV.
XP distribution at c.m. energy 189.0 GeV.
XP distribution at c.m. energy 196.0 GeV.
XP distribution at c.m. energy 200.0 GeV.
XP distribution at c.m. energy 206.0 GeV.
Peak position in XI distribution for different c.m. energies.
XI distribution at c.m. energy 133.0 GeV.
XI distribution at c.m. energy 161.0 GeV.
XI distribution at c.m. energy 172.0 GeV.
XI distribution at c.m. energy 183.0 GeV.
XI distribution at c.m. energy 189.0 GeV.
XI distribution at c.m. energy 196.0 GeV.
XI distribution at c.m. energy 200.0 GeV.
XI distribution at c.m. energy 206.0 GeV.
XE distribution at c.m. energy 133.0 GeV.
XE distribution at c.m. energy 161.0 GeV.
XE distribution at c.m. energy 172.0 GeV.
XE distribution at c.m. energy 183.0 GeV.
XE distribution at c.m. energy 189.0 GeV.
XE distribution at c.m. energy 196.0 GeV.
XE distribution at c.m. energy 200.0 GeV.
XE distribution at c.m. energy 206.0 GeV.
PTIN distribution at c.m. energy 133.0 GeV.
PTIN distribution at c.m. energy 161.0 GeV.
PTIN distribution at c.m. energy 172.0 GeV.
PTIN distribution at c.m. energy 183.0 GeV.
PTIN distribution at c.m. energy 189.0 GeV.
PTIN distribution at c.m. energy 196.0 GeV.
PTIN distribution at c.m. energy 200.0 GeV.
PTIN distribution at c.m. energy 206.0 GeV.
PTOUT distribution at c.m. energy 206.0 GeV.
RAPIDITY W.R.T THRUST AXIS distribution at c.m. energy 133.0 GeV.
RAPIDITY W.R.T THRUST AXIS distribution at c.m. energy 161.0 GeV.
RAPIDITY W.R.T THRUST AXIS distribution at c.m. energy 172.0 GeV.
RAPIDITY W.R.T THRUST AXIS distribution at c.m. energy 183.0 GeV.
RAPIDITY W.R.T THRUST AXIS distribution at c.m. energy 189.0 GeV.
RAPIDITY W.R.T THRUST AXIS distribution at c.m. energy 196.0 GeV.
RAPIDITY W.R.T THRUST AXIS distribution at c.m. energy 200.0 GeV.
RAPIDITY W.R.T THRUST AXIS distribution at c.m. energy 206.0 GeV.
RAPIDITY W.R.T. SPHERICITY AXIS distribution at c.m. energy 133.0 GeV.
RAPIDITY W.R.T. SPHERICITY AXIS distribution at c.m. energy 161.0 GeV.
RAPIDITY W.R.T. SPHERICITY AXIS distribution at c.m. energy 172.0 GeV.
RAPIDITY W.R.T. SPHERICITY AXIS distribution at c.m. energy 183.0 GeV.
RAPIDITY W.R.T. SPHERICITY AXIS distribution at c.m. energy 189.0 GeV.
RAPIDITY W.R.T. SPHERICITY AXIS distribution at c.m. energy 196.0 GeV.
RAPIDITY W.R.T. SPHERICITY AXIS distribution at c.m. energy 200.0 GeV.
RAPIDITY W.R.T. SPHERICITY AXIS distribution at c.m. energy 206.0 GeV.
Combined results for ALPHAS.
Event shape means.
THRUST distribution at c.m. energy 91.20 GeV.
1-THRUST distribution at c.m. energy 133.00 GeV.
1-THRUST distribution at c.m. energy 161.00 GeV.
1-THRUST distribution at c.m. energy 172.00 GeV.
1-THRUST distribution at c.m. energy 183.00 GeV.
1-THRUST distribution at c.m. energy 189.00 GeV.
1-THRUST distribution at c.m. energy 200.00 GeV.
1-THRUST distribution at c.m. energy 206.00 GeV.
Heavy Jet Mass (RHO) distribution at c.m. energy 91.20 GeV.
Heavy Jet Mass (RHO) distribution at c.m. energy 133.00 GeV.
Heavy Jet Mass (RHO) distribution at c.m. energy 161.00 GeV.
Heavy Jet Mass (RHO) distribution at c.m. energy 172.00 GeV.
Heavy Jet Mass (RHO) distribution at c.m. energy 183.00 GeV.
Heavy Jet Mass (RHO) distribution at c.m. energy 189.00 GeV.
Heavy Jet Mass (RHO) distribution at c.m. energy 200.00 GeV.
Heavy Jet Mass (RHO) distribution at c.m. energy 206.00 GeV.
Total jet broadening distribution at c.m. energy 91.20 GeV.
Total jet broadening distribution at c.m. energy 133.00 GeV.
Total jet broadening distribution at c.m. energy 161.00 GeV.
Total jet broadening distribution at c.m. energy 172.00 GeV.
Total jet broadening distribution at c.m. energy 183.00 GeV.
Total jet broadening distribution at c.m. energy 189.00 GeV.
Total jet broadening distribution at c.m. energy 200.00 GeV.
Total jet broadening distribution at c.m. energy 206.00 GeV.
Wide jet broadening distribution at c.m. energy 91.20 GeV.
Wide jet broadening distribution at c.m. energy 133.00 GeV.
Wide jet broadening distribution at c.m. energy 161.00 GeV.
Wide jet broadening distribution at c.m. energy 172.00 GeV.
Wide jet broadening distribution at c.m. energy 183.00 GeV.
Wide jet broadening distribution at c.m. energy 189.00 GeV.
Wide jet broadening distribution at c.m. energy 200.00 GeV.
Wide jet broadening distribution at c.m. energy 206.00 GeV.
C-PARAMETER distribution at c.m. energy 91.20 GeV.
C-PARAMETER distribution at c.m. energy 133.00 GeV.
C-PARAMETER distribution at c.m. energy 161.00 GeV.
C-PARAMETER distribution at c.m. energy 172.00 GeV.
C-PARAMETER distribution at c.m. energy 183.00 GeV.
C-PARAMETER distribution at c.m. energy 189.00 GeV.
C-PARAMETER distribution at c.m. energy 200.00 GeV.
C-PARAMETER distribution at c.m. energy 206.00 GeV.
Thrust Major distribution at c.m. energy 91.20 GeV.
Thrust Major distribution at c.m. energy 133.00 GeV.
Thrust Major distribution at c.m. energy 161.00 GeV.
Thrust Major distribution at c.m. energy 172.00 GeV.
Thrust Major distribution at c.m. energy 183.00 GeV.
Thrust Major distribution at c.m. energy 189.00 GeV.
Thrust Major distribution at c.m. energy 200.00 GeV.
Thrust Major distribution at c.m. energy 206.00 GeV.
Thrust Minor distribution at c.m. energy 91.20 GeV.
Thrust Minor distribution at c.m. energy 133.00 GeV.
Thrust Minor distribution at c.m. energy 161.00 GeV.
Thrust Minor distribution at c.m. energy 172.00 GeV.
Thrust Minor distribution at c.m. energy 183.00 GeV.
Thrust Minor distribution at c.m. energy 189.00 GeV.
Thrust Minor distribution at c.m. energy 200.00 GeV.
Thrust Minor distribution at c.m. energy 206.00 GeV.
Jet Mass Difference distribution at c.m. energy 91.20 GeV.
Jet Mass Difference distribution at c.m. energy 133.00 GeV.
Jet Mass Difference distribution at c.m. energy 161.00 GeV.
Jet Mass Difference distribution at c.m. energy 172.00 GeV.
Jet Mass Difference distribution at c.m. energy 183.00 GeV.
Jet Mass Difference distribution at c.m. energy 189.00 GeV.
Jet Mass Difference distribution at c.m. energy 200.00 GeV.
Jet Mass Difference distribution at c.m. energy 206.00 GeV.
Aplanarity distribution at c.m. energy 91.20 GeV.
Aplanarity distribution at c.m. energy 133.00 GeV.
Aplanarity distribution at c.m. energy 161.00 GeV.
Aplanarity distribution at c.m. energy 172.00 GeV.
Aplanarity distribution at c.m. energy 183.00 GeV.
Aplanarity distribution at c.m. energy 189.00 GeV.
Aplanarity distribution at c.m. energy 200.00 GeV.
Aplanarity distribution at c.m. energy 206.00 GeV.
Planarity distribution at c.m. energy 133.00 GeV.
Planarity distribution at c.m. energy 161.00 GeV.
Planarity distribution at c.m. energy 172.00 GeV.
Planarity distribution at c.m. energy 183.00 GeV.
Planarity distribution at c.m. energy 189.00 GeV.
Planarity distribution at c.m. energy 200.00 GeV.
Planarity distribution at c.m. energy 206.00 GeV.
Oblateness distribution at c.m. energy 91.20 GeV.
Oblateness distribution at c.m. energy 133.00 GeV.
Oblateness distribution at c.m. energy 161.00 GeV.
Oblateness distribution at c.m. energy 172.00 GeV.
Oblateness distribution at c.m. energy 183.00 GeV.
Oblateness distribution at c.m. energy 189.00 GeV.
Oblateness distribution at c.m. energy 200.00 GeV.
Oblateness distribution at c.m. energy 206.00 GeV.
Sphericity distribution at c.m. energy 91.20 GeV.
Sphericity distribution at c.m. energy 133.00 GeV.
Sphericity distribution at c.m. energy 161.00 GeV.
Sphericity distribution at c.m. energy 172.00 GeV.
Sphericity distribution at c.m. energy 183.00 GeV.
Sphericity distribution at c.m. energy 189.00 GeV.
Sphericity distribution at c.m. energy 200.00 GeV.
Sphericity distribution at c.m. energy 206.00 GeV.
LN(Y12) distribution at c.m. energy 91.20 GeV.
LN(Y12) distribution at c.m. energy 133.00 GeV.
LN(Y12) distribution at c.m. energy 161.00 GeV.
LN(Y12) distribution at c.m. energy 172.00 GeV.
LN(Y12) distribution at c.m. energy 183.00 GeV.
LN(Y12) distribution at c.m. energy 189.00 GeV.
LN(Y12) distribution at c.m. energy 200.00 GeV.
LN(Y12) distribution at c.m. energy 206.00 GeV.
LN(Y23) distribution at c.m. energy 91.20 GeV.
LN(Y23) distribution at c.m. energy 133.00 GeV.
LN(Y23) distribution at c.m. energy 161.00 GeV.
LN(Y23) distribution at c.m. energy 172.00 GeV.
LN(Y23) distribution at c.m. energy 183.00 GeV.
LN(Y23) distribution at c.m. energy 189.00 GeV.
LN(Y23) distribution at c.m. energy 200.00 GeV.
LN(Y23) distribution at c.m. energy 206.00 GeV.
LN(Y34) distribution at c.m. energy 91.20 GeV.
LN(Y34) distribution at c.m. energy 133.00 GeV.
LN(Y34) distribution at c.m. energy 161.00 GeV.
LN(Y34) distribution at c.m. energy 172.00 GeV.
LN(Y34) distribution at c.m. energy 183.00 GeV.
LN(Y34) distribution at c.m. energy 189.00 GeV.
LN(Y34) distribution at c.m. energy 200.00 GeV.
LN(Y34) distribution at c.m. energy 206.00 GeV.
LN(Y45) distribution at c.m. energy 91.20 GeV.
LN(Y45) distribution at c.m. energy 133.00 GeV.
LN(Y45) distribution at c.m. energy 161.00 GeV.
LN(Y45) distribution at c.m. energy 172.00 GeV.
LN(Y45) distribution at c.m. energy 183.00 GeV.
LN(Y45) distribution at c.m. energy 189.00 GeV.
LN(Y45) distribution at c.m. energy 206.00 GeV.
LN(Y56) distribution at c.m. energy 91.20 GeV.
LN(Y56) distribution at c.m. energy 133.00 GeV.
LN(Y56) distribution at c.m. energy 161.00 GeV.
LN(Y56) distribution at c.m. energy 172.00 GeV.
LN(Y56) distribution at c.m. energy 183.00 GeV.
LN(Y56) distribution at c.m. energy 189.00 GeV.
LN(Y56) distribution at c.m. energy 206.00 GeV.
1-jet fraction at c.m. energy 91.20 GeV.
1-jet fraction at c.m. energy 133.00 GeV.
1-jet fraction at c.m. energy 161.00 GeV.
1-jet fraction at c.m. energy 172.00 GeV.
1-jet fraction at c.m. energy 183.00 GeV.
1-jet fraction at c.m. energy 189.00 GeV.
1-jet fraction at c.m. energy 200.00 GeV.
1-jet fraction at c.m. energy 206.00 GeV.
2-jet fraction at c.m. energy 91.20 GeV.
2-jet fraction at c.m. energy 133.00 GeV.
2-jet fraction at c.m. energy 161.00 GeV.
2-jet fraction at c.m. energy 172.00 GeV.
2-jet fraction at c.m. energy 183.00 GeV.
2-jet fraction at c.m. energy 189.00 GeV.
2-jet fraction at c.m. energy 200.00 GeV.
2-jet fraction at c.m. energy 206.00 GeV.
3-jet fraction at c.m. energy 91.20 GeV.
3-jet fraction at c.m. energy 133.00 GeV.
3-jet fraction at c.m. energy 161.00 GeV.
3-jet fraction at c.m. energy 172.00 GeV.
3-jet fraction at c.m. energy 183.00 GeV.
3-jet fraction at c.m. energy 189.00 GeV.
3-jet fraction at c.m. energy 200.00 GeV.
3-jet fraction at c.m. energy 206.00 GeV.
4-jet fraction at c.m. energy 91.20 GeV.
4-jet fraction at c.m. energy 133.00 GeV.
4-jet fraction at c.m. energy 161.00 GeV.
4-jet fraction at c.m. energy 172.00 GeV.
4-jet fraction at c.m. energy 183.00 GeV.
4-jet fraction at c.m. energy 189.00 GeV.
4-jet fraction at c.m. energy 200.00 GeV.
4-jet fraction at c.m. energy 206.00 GeV.
5-jet fraction at c.m. energy 91.20 GeV.
5-jet fraction at c.m. energy 133.00 GeV.
5-jet fraction at c.m. energy 161.00 GeV.
5-jet fraction at c.m. energy 172.00 GeV.
5-jet fraction at c.m. energy 183.00 GeV.
5-jet fraction at c.m. energy 189.00 GeV.
5-jet fraction at c.m. energy 200.00 GeV.
5-jet fraction at c.m. energy 206.00 GeV.
>=6-jet fraction at c.m. energy 91.20 GeV.
>=6-jet fraction at c.m. energy 133.00 GeV.
>=6-jet fraction at c.m. energy 161.00 GeV.
>=6-jet fraction at c.m. energy 172.00 GeV.
>=6-jet fraction at c.m. energy 183.00 GeV.
>=6-jet fraction at c.m. energy 189.00 GeV.
>=6-jet fraction at c.m. energy 200.00 GeV.
>=6-jet fraction at c.m. energy 206.00 GeV.
We present results obtained from a study of the structure of hadronic events recorded by the L3 detector at various centre-of-mass energies. The distributions of event shape variables and the energy dependence of their mean values are measured from 30GeV to 189GeV and compared with various QCD models. The energy dependence of the moments of event shape variables is used to test a power law ansatz for the non-perturbative component. We obtain a universal value of the non-perturbative parameter alpha_0 = 0.537 +/- 0.073. From a comparison with resummed O(alpha_s^2) QCD calculations, we determine the strong coupling constant at each of the selected energies. The measurements demonstrate the running of alpha_s as expected in QCD with a value of alpha_s(m_Z) = 0.1215 +/- 0.0012 (exp) +/- 0.0061 (th).
Distribution for THRUST at c.m. energy 189 GeV.
Distribution for Heavy Jet Mass at c.m. energy 189 GeV.
Distribution for Total Jet Broadening at c.m. energy 189 GeV.
Distribution for Wide Jet Broadening at c.m. energy 189 GeV.
Distribution for C-Parameter at c.m. energy 189 GeV.
Mean values (first moments) of the 1-THRUST distributions as a function of c.m. energy.
Mean values (first moments) of the Heavy Jet Mass distributions as a function of c.m. energy.
Mean values (first moments) of the Total Jet Broadening distributions as a function of c.m. energy.
Mean values (first moments) of the Wide Jet Broadening distributions as a function of c.m. energy.
Mean values (first moments) of the C-Parameter distributions as a function of c.m. energy.
Dispersion values (second moments) of the 1-THRUST distributions as a function of c.m. energy.
Dispersion values (second moments) of the Heavy Jet Mass distributions as afunction of c.m. energy.
Dispersion values (second moments) of the Total Jet Broadening distributions as a function of c.m. energy.
Dispersion values (second moments) of the Wide Jet Broadening distributionsas a function of c.m. energy.
Dispersion values (second moments) of the C-Parameter distributions as a function of c.m. energy.
Values of the strong coupling constant ALPHA-s at the Z0 mass, from fits tothe first moments of the various event shape distribution.
The strong coupling constant, ALPHA-s, measured at different c.m. energies from a fit to the 1-THRUST distribution. The second DSYS error is the uncertainty in the theory.
The strong coupling constant, ALPHA-s, measured at different c.m. energies from a fit to the Heavy Jet Mass distribution. The second DSYS error is the uncertainty in the theory.
The strong coupling constant, ALPHA-s, measured at different c.m. energies from a fit to the Total Jet Broadening distribution. The second DSYS error is the uncertainty in the theory.
The strong coupling constant, ALPHA-s, measured at different c.m. energies from a fit to the Wide Jet Broadening distribution. The second DSYS error is theuncertainty in the theory.
The strong coupling constant, ALPHA-s, measured at different c.m. energies from a fit to the C-Parameter distribution. The second DSYS error is the uncertainty in the theory.
The strong coupling constant, ALPHA-s, as determined from the combined event shape variables as a function of c.m. energy. The values for c.m. energy belowthe Z0 mass were determined only for four event shape variables.
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