Quarks and gluons: tests of QCD in e+e− annihilations

Field, J. H.; Jérémie, H.

doi:10.1016/s1631-0705(02)01403-2

Cited by 3 publications

(2 citation statements)

References 53 publications

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“…The ratio of 3-jet to all-jet is approximately 0.18 ± 0.03, which is comparable with the empirical value of 0.17 ± 0.01 by OPAL collaboration [15][16][17][18][19], because λ 1 + λ 2 ∼ = 1.0.…”

Section: Our Analysis Based On Cf II ×Lrcsupporting

confidence: 85%

Analysis of OPAL Bose-Einstein Correlation at $Z^0$-pole by the second conventional formula

Mizoguchi¹,

Matsumoto²,

Biyajima³

2021

Preprint

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We investigate the contribution of 2-jet and 3-jet at Z 0 -pole in OPAL Bose-Einstein correlation (BEC) by using the second conventional formula with two-component, as well as introducing random variables for the MINUIT method. It is found that the magnitude of the 3-jet is 1.29 ± 0.27 fm, which is about 34% higher than that of the 2-jet (0.96 ± 0.01) fm. The fraction of 3-jet to all-jet is 0.18 ± 0.03, which is consistent with an empirical value by the OPAL collaboration.

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Section: Our Analysis Based On Cf II ×Lrcsupporting

confidence: 85%

Analysis of OPAL Bose-Einstein Correlation at $Z^0$-pole by the second conventional formula

Mizoguchi¹,

Matsumoto²,

Biyajima³

2021

Preprint

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“…The lep experiments have been very active since 1989 in performing quantitative tests of QCD [65][66][67][68][69]. Due to its large hadronic branching ratio, negligible background from other processes, and a strong suppression of initial state radiation, the Z resonance has offered unique conditions for detailed QCD studies.…”

Section: Experimental Frameworkmentioning

confidence: 99%

Studies of hadronic event structure in e+e- annihilation from 30 to 209GeV with the L3 detector

et al. 2004

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In this Report, QCD results obtained from a study of hadronic event structure in high energy e+e− interactions with the L3 detector are presented. The operation of the LEP collider at many different collision energies from 91 to 209 GeV offers a unique opportunity to test QCD by measuring the energy dependence of different observables. The main results concern the measurement of the strong coupling constant, alpha_s, from hadronic event shapes and the\ud study of effects of soft gluon coherence in charged particle multiplicity and momentum distributions

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