Measurement of Inclusive f_1(1285) and f_1(1420) Production in Z Decays with the DELPHI Detector

Details Measurement of Inclusive f_1(1285) and f_1(1420) Production in Z Decays with the DELPHI Detector Measurement of Inclusive f_1(1285) and f_1(1420) Production in Z Decays with the DELPHI Detector

2003-09-18

arxiv.org/abs/hep-ex/0309057v1

Phys.Lett.B569:129-139,2003

Physics

High Energy Physics

High Energy Physics - Experiment

16 pages, 5 figures

Scientific paper

10.1016/j.physletb.2003.07.032

DELPHI results are presented on the inclusive production of two (K Kbar pi)^0 states in the mass region 1.2-1.6 GeV/c^2 in hadronic Z decays at LEP I. The measured masses (widths) are 1274 +/- 6 MeV/c^2 (29 +/- 12 MeV/c^2) and 1426 +/- 6 MeV/c^2 (51 +/- 14 MeV/c^2) respectively. A partial-wave analysis of the (K Kbar pi)^0 system shows that the first peak is consistent with the I^G(J^{PC})=0^+(1^{++})/(0^{-+}) a_0(980)pi and the second with the I^G(J^{PC})=0^+(1^{++}) K^*(892)Kbar + c.c. assignments. The total hadronic production rates per hadronic Z decay are (0.165 +/- 0.051) and (0.056 +/- 0.012) respectively. These measurements are consistent with the two states being the f_1(1285) and f_1(1420) mesons.

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