Using data obtained with the ALEPH detector at the Z resonance, a measure based on transverse momentum is shown to exhibit a correlation between the two halves of a hadronic event which cannot be explained by energy-momentum conservation, flavour conservation, the imposition of an event axis or imperfect event reconstruction. Two possible interpretations based on existing Monte Carlo models are examined: a) ARIADNE, with the correlation forming early in the parton shower and with the transition from partons to hadrons playing only a minor part; b) JETSET, with the correlation forming at the fragmentation stage. A correlation technique based on a jet cluster analysis is used to make a comparison of the models with the data. It is concluded that both non-perturbative and perturbative effects make important contributions to the observed correlation.

Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1997). Transverse momentum correlations in hadronic Z decays. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 73(3), 421-432 [10.1007/s002880050331].

Transverse momentum correlations in hadronic Z decays

CARPINELLI, Massimo;
1997

Abstract

Using data obtained with the ALEPH detector at the Z resonance, a measure based on transverse momentum is shown to exhibit a correlation between the two halves of a hadronic event which cannot be explained by energy-momentum conservation, flavour conservation, the imposition of an event axis or imperfect event reconstruction. Two possible interpretations based on existing Monte Carlo models are examined: a) ARIADNE, with the correlation forming early in the parton shower and with the transition from partons to hadrons playing only a minor part; b) JETSET, with the correlation forming at the fragmentation stage. A correlation technique based on a jet cluster analysis is used to make a comparison of the models with the data. It is concluded that both non-perturbative and perturbative effects make important contributions to the observed correlation.
Articolo in rivista - Articolo scientifico
Physics
English
421
432
12
Buskulic, D., Debonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1997). Transverse momentum correlations in hadronic Z decays. ZEITSCHRIFT FÜR PHYSIK. C, PARTICLES AND FIELDS, 73(3), 421-432 [10.1007/s002880050331].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390204
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