Production Properties of the Orbitally Excited Mesons f_0(980), f_2(1270), K^*0_2(1430) and f'_2(1525) in Z^0 Hadronic Decays

TL;DR

This paper reports on the measurement of production rates of several orbitally excited mesons in Z^0 hadronic decays, using DELPHI detector data, and compares the results with other experiments and theoretical models.

Contribution

It provides new measurements of production rates of specific excited mesons in Z^0 decays using advanced particle identification techniques.

Findings

Measured production rates for five mesons with uncertainties.

Compared results with other LEP experiments.

Analyzed differential cross-sections and model predictions.

Abstract

DELPHI results are presented on the inclusive production of the neutral mesons rho^0, f_0(980), f_2(1270), K^*0_2(1430) and f'_2(1525) in hadronic Z^0 decays. They are based on about 2 million multihadronic events collected in 1994 and 1995, using the particle identification capabilities of the DELPHI Ring Imaging Cherenkov detectors and measured ionization losses in the Time Projection Chamber. The total production rates per hadronic Z^0 decay have been determined to be: 1.19 +/- 0.10 for rho^0; 0.164 +/- 0.021 for f_0(980); 0.214 +/- 0.038 for f_2(1270); 0.073 +/- 0.023 for K^*0_2(1430); and 0.012 +/- 0.006 for f'_2(1525). The total production rates for all mesons and differential cross-sections for the rho^0, f_0(980) and f_2(1270) are compared with the results of other LEP experiments and with models.