Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, CA/CF, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: CA/CF= 2.246 ± 0.062(stat.) ± 0.080 (syst.) ± 0.095 (theo.) © 1999 Elsevier Science B.V. All rights reserved.

Abreu, P., Adam, W., Adye, T., Adzic, P., Ajinenko, I., Albrecht, Z., et al. (1999). The scale dependence of the hadron multiplicity in quark and gluon jets and a precise determination of CA/CF. PHYSICS LETTERS. SECTION B, 449(3-4), 383-400 [10.1016/S0370-2693(99)00112-4].

The scale dependence of the hadron multiplicity in quark and gluon jets and a precise determination of CA/CF

Calvi, M.;Paganoni, M.;Ragazzi, S.;Tabarelli, T.;Terranova, F.;
1999

Abstract

Data collected at the Z resonance using the DELPHI detector at LEP are used to determine the charged hadron multiplicity in gluon and quark jets as a function of a transverse momentum-like scale. The colour factor ratio, CA/CF, is directly observed in the increase of multiplicities with that scale. The smaller than expected multiplicity ratio in gluon to quark jets is understood by differences in the hadronization of the leading quark or gluon. From the dependence of the charged hadron multiplicity on the opening angle in symmetric three-jet events the colour factor ratio is measured to be: CA/CF= 2.246 ± 0.062(stat.) ± 0.080 (syst.) ± 0.095 (theo.) © 1999 Elsevier Science B.V. All rights reserved.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
1999
449
3-4
383
400
none
Abreu, P., Adam, W., Adye, T., Adzic, P., Ajinenko, I., Albrecht, Z., et al. (1999). The scale dependence of the hadron multiplicity in quark and gluon jets and a precise determination of CA/CF. PHYSICS LETTERS. SECTION B, 449(3-4), 383-400 [10.1016/S0370-2693(99)00112-4].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/187558
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