HEPData Search

Multihadronic e+e− annihilation events at a center-of-mass energy of 29 GeV have been studied with both the original (PEP 5) Mark II and the upgraded Mark II detectors. Detector-corrected distributions from global shape analyses such as aplanarity, Q2-Q1, sphericity, thrust, minor value, oblateness, and jet masses, and inclusive charged-particle distributions including x, rapidity, p⊥, and particle flow are presented. These distributions are compared with predictions from various multihadron event models which use leading-logarithmic shower evolution or QCD matrix elements at the parton level and string or cluster fragmentation for hadronization. The new generation of parton-shower models gives, on the average, a better description of the data than the previous parton-shower models. The energy behavior of these models is compared to existing e+e− data. The predictions of the models at a center-of-mass energy of 93 GeV, roughly the expected mass of the Z0, are also presented.

74 data tables

Table 1

Aplanarity distribution.

Table 2

QX Distribution(QX=SQRT(3)*(Q3-Q2)).

Table 3

The (Q2-Q1) distribution.

Table 4

Sphericity distribution.

Table 5

Thrust distribution.

Table 6

The minor value distribution.

Table 7

Oblateness distribution.

Table 8

The invariant mass square of the broad jet.

Table 9

The invariant mass square of the slim jet.

Table 10

The mass square difference of the broad and slim jet.

Table 11

The transverse momentum distribution with respect to the sphericity axis.

Table 12

The transverse momentum distribution with respect to the sphericity axis.

Table 13

The momentum distribution out of the event plane.

Table 14

The transverse momentum distribution in the event plane with respect to the sphericity axis.

Table 15

The scaled momentum distribution.

Table 16

Rapidity distribution (folded around yrap=0).

Table 17

The charged particle flow with respect to the sphericity axis.

Table 18

The energy flow with respect to the sphericity axis.

Table 19

Aplanarity distribution.

Table 20

QX Distribution (QX=SQRT(3)*(Q3-Q2).

Table 21

The (Q2-Q1) distributions.

Table 22

Sphericity distribution.

Table 23

Thrust distribution.

Table 24

The minor value distribution.

Table 25

Oblateness distribution.

Table 26

The invariant mass square of the broad jet.

Table 27

No description provided.

Table 28

The mass square difference of the broad and slim jet.

Table 29

The transverse momentum disribution with respect to the sphericity axis.

Table 30

The transverse momentum distribution with respect to the sphericity axis.

Table 31

The momentum distribution out of the event plane.

Table 32

The transverse momentum distribution in the event plane with respect to the sphericity axis.

Table 33

The scaled momentum distribution.

Table 34

Rapidity distribution (folded around yrap=0).

Table 35

The charged particle flow with respect to the sphericity axis.

Table 36

No description provided.

Table 37

Aplanarity distribution.

Table 38

QX distribution (QX=SQRT(3)*(Q3-Q2).

Table 39

The (Q2-Q1) distribution.

Table 40

Sphericity distribution.

Table 41

Thrust distribution.

Table 42

The minor value distribution.

Table 43

Oblateness distribution.

Table 44

The invariant mass square of the broad jet.

Table 45

The invariant mass square of the slim jet.

Table 46

The mass square difference of the broad and slim jet.

Table 47

The transverse momentum distribution with respect to the sphericity axis.

Table 48

The transverse momentum distribution with respect to the sphericity axis.

Table 49

The momentum distribution out of the event plane.

Table 50

The transverse momentum distribution in the event plane with respect to the sphericity axis.

Table 51

No description provided.

Table 52

Rapidity distribution (folded around yrap=0).

Table 53

The charged particle flow with respect to the sphericity axis.

Table 54

The energy flow with respect to the sphericity axis.

Table 55