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

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

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DELPHI Collaboration; Castillo Giménez, María Victoria; Higón Rodríguez, Emilio; Cases Ruiz, Ramón; Ferrer Soria, Antonio; Chrin, J. T. M.; Cortina Gil, Eduardo; Ferrer Soria, Antonio; Fuster Verdú, Juan A.; García García, Carmen; Gómez Cadenas, Juan José; Hernández Rey, Juan José; Hernando Morata, José Ángel; Lacasta Llácer, Carlos; Lozano Bahilo, José Julio; Martínez Vidal, Fernando; Martí García, Salvador; Navas Concha, Sergio; Salt Cairols, José; Valls Ferrer, Juan Antonio

Aquest document és un/a article, creat/da en: 1995

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 th... [Llegir més ...]

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