Measurement of the quark and gluon fragmentation functions in Z0 hadronic decays
(1999) European Physical Journal C. Particles and Fields — Vol. 6, n° 1, p. 19-33 (1999)
Files
art3A1010072Fs100529801013.pdf
Open Access - Adobe PDF
- 257.89 KB
Details
- Authors
- et. al.
- Abstract
- The transverse, longitudinal and asymmetric components of the fragmentation function are measured from the inclusive charged particles produced in e+e− collisions at LEP. As in deep inelastic scattering, these data are important for tests of QCD. The transverse σT and longitudinal σL components of the total hadronic cross section σtot are evaluated from the measured fragmentation functions. They are found to be σT/σtot=0.949±0.001(stat.)±0.007(syst.) and σL/σtot=0.051±0.001(stat.)±0.007(syst.) respectively. The strong coupling constant is calculated from σL/σtot in next-to-leading order of perturbative QCD, giving αs(MZ)=0.120±0.002(stat.)±0.013(syst.)±0.007(scale). Including non-perturbative power corrections leads toαs(MZ)=0.101±0.002(stat.)±0.013(syst.)±0.007(scale). The measured transverse and longitudinal components of the fragmentation function are used to estimate the mean charged multiplicity,⟨nch⟩=21.21±0.01(stat.)±0.20(syst.) The fragmentation functions and multiplicities in bb− and light quark events are compared. The measured transverse and longitudinal components of the fragmentation function allow the gluon fragmentation function to be evaluated.
- Affiliations
Citations
Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1999). Measurement of the quark and gluon fragmentation functions in Z0 hadronic decays. European Physical Journal C. Particles and Fields, 6(1), 19-33. https://doi.org/10.1007/s100529801013 (Original work published 1999)