Production characteristics of K0 and light meson resonances in hadronic decays of the Z0

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(1995) Zeitschrift für Physik. C, Particles and fields — Vol. 65, n° 4, p. 587-602 (1995)

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An analysis of inclusive production of K0 and the meson resonances K*±(892), ρ0(770),f 0(975) andf 2(1270) in hadronic decays of the Z0 is presented, based on about 973,000 multihadronic events collected by the DELPHI detector at LEP during 1991 and 1992. Overall multiplicities have been determined as 1.962±0.060 K0 mesons, 0.712±0.067 K*±(892) and 1.21±0.15ρ0(770) per hadronic Z0 decay. The average multiplicities off 0(975) for scaled momentum,x p , in the range 0.05≤x p ≤0.6 and off 2(1270) for 0.05≤x p ≤1.0 are 0.098±0.016 and 0.170±0.043 respectively. Thef 0(975) and ρ0(770)x p -spectra have similar shapes. Thef 2(1270)/ρ0(770) ratio increases withx p . The average multiplicities and the differential cross sections are compared with the JETSET Parton Shower model. The model with default parameters fails to reproduce the experimental K0 momentum spectrum at low momentum, describes the K*±(892) and ρ0(770)x p -spectrum shapes, but significantly overestimates their production rates.
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1995). Production characteristics of K0 and light meson resonances in hadronic decays of the Z0. Zeitschrift für Physik. C, Particles and fields, 65(4), 587-602. https://doi.org/10.1007/BF01578668 (Original work published 1995)