HEPData Search

Previously published and as yet unpublished QCD results obtained with the ALEPH detector at LEP1 are presented. The unprecedented statistics allows detailed studies of both perturbative and non-perturbative aspects of strong interactions to be carried out using hadronic Z and tau decays. The studies presented include precise determinations of the strong coupling constant, tests of its flavour independence, tests of the SU(3) gauge structure of QCD, study of coherence effects, and measurements of single-particle inclusive distributions and two-particle correlations for many identified baryons and mesons.

44 data tables

Table 1

Charged particle sphericity distribution.

Table 2

Charged particle aplanarity distribution.

Table 3

Charged particle Thrust distribution.

Table 4

Charged particle Thrust(minor) distribution.

Table 5

Charged particle Two-jet resolution variable, Y3 distribution.

Table 6

Charged particle Heavy Jet Mass distribution.

Table 7

Charged particle C-Parameter distribution.

Table 8

Charged particle Oblateness distribution.

Table 9

Charged particle XP distribution.

Table 10

Charged particle rapidity distribution.

Table 11

Charged particle PTIN distribution.

Table 12

Charged particle PTOUT distribution.

Table 13

Measure n-jet rates using the Durham cluster algorithm as a function of thejet-resolution parameter YCUT.

Table 14

Measure n-jet rates using the Durham cluster algorithm as a function of thejet-resolution parameter YCUT.

Table 15

Measure n-jet rates using the Durham cluster algorithm as a function of thejet-resolution parameter YCUT.

Table 16

Measure n-jet rates using the Durham cluster algorithm as a function of thejet-resolution parameter YCUT.

Table 17

Charged particle inclusive distribution of -LN(1/X).

Table 18

Unfolded charged particle multiplicity distribution giving the probability to have a hadronic Z0 decay with N charged particles.

Table 19

Values of the mean values of the leading moments of the charged particle multiplicity distribution. R2 is the second binomial moment defined as MEAN(N*(N-1))/MULT**2.

Table 20

Unfolded values of the the mean multiplicity and dispersion of the multiplicity distributions integaretd over the rapidity region -0.5 to 0.5.

Table 21

Unfolded values of the the mean multiplicity and dispersion of the multiplicity distributions integrated over the rapidity region -1.0 to 1.0.

Table 22

Unfolded values of the the mean multiplicity and dispersion of the multiplicity distributions integrated over the rapidity region -1.5 to 1.5.

Table 23

Unfolded values of the the mean multiplicity and dispersion of the multiplicity distributions integrated over the rapidity region -2.0 to 2.0.

Table 24

Unfolded values of the the mean multiplicity and dispersion of the multiplicity distribution integrated over the full rapidity region.

Table 25

Differential cross sections for the inclusive production of PI+-. Additional 3pct systematic uncertainty.

Table 26

Differential cross sections for the inclusive production of K+-. Additionalsystematic uncertainty 3% above and 5% below X = 0.010.

Table 27

Differential cross sections for the inclusive production of P PBAR. Additional systematic uncertainty 3% above and 5% below X = 0.018.

Table 28

Measured inclusive photon cross section. Errors contain both statistical and systematic uncertainties.

Table 29

Measured differential cross section for PI0 production.

Table 30

Measured fragmentation function at the ETA meson. Additional 6pct systematic error.

Table 31

Measured fragmentation function at the ETAPRIME meson. Additional 8pct systematic error.

Table 32

Inclusive K0 spectrum. Additional 2pct normalization error.

Table 33

Inclusive LAMBDA spectrum. Additional 4pct normalization error.

Table 34

Fragmentation distribution for XI production.

Table 35

Fragmentation distribution for SIGMA(1385) production.

Table 36

Fragmentation distribution for XI(1530) production.

Table 37

Differential cross section for RHO0 production.

Table 38

Differential cross section for OMEGA production.

Table 39

Differential cross section for K*0 production.

Table 40

Differential cross section for PHI production.

Table 41

Differential cross section for K*0 production as a function of the transverse momentum with respect to the Thrust axis.

Table 42

Differential cross section for PHI production as a function of the transverse momentum with respect to the Thrust axis.

Table 43

Fragmentation distribution for K*+- production.

Table 44

Mean Multiplicities. Where a second systematic error is given, this is due to the uncertainty in the extrapolation to X = 0. Note that the ETA and ETAPRIMEvalues are for X > 0.1.

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