Measurement of inclusive f(1)(1285) and f(1)(1420) production in Z decays with the DELPHI detector
Collaboration
14 pages
Published in:
- Phys.Lett.B 569 (2003) 129-139
e-Print:
- hep-ex/0309057 [hep-ex]
PDG: MASS
Report number:
- CERN-EP-2003-027
Experiments:
View in:
Citations per year
Abstract:
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.Note:
- 16 pages, 5 figures Report-no: CERN-EP-2003-027 Journal-ref: Phys. Lett. B569 (2003) 129-139
- electron positron: colliding beams
- electron positron: annihilation
- Z0: electroproduction
- Z0: hadronic decay
- f1(1285): mass
- f1(1285): width
- f1(1420): mass
- f1(1420): width
- mass spectrum: (K0(S) K pi)
- partial wave analysis
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