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Measurement of inclusive K*0 (892), Phi (1020) and K(2)*0 (1430) production in hadronic Z decays

Collaboration
Jun, 1996
25 pages
Published in:
  • Z.Phys.C 73 (1996) 61-72
DOI:
Report number:
  • CERN-PPE-96-077,
  • CERN-PPE-96-77
Experiments:
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Abstract: (Springer)
The inclusive production of the neutral vector mesons K*0(892) and ϕ(1020), and of the tensor meson ⤪K2⇒t0(1430){⤪ K}_{2}^{⇒t 0}(1430), in hadronic decays of the Z has been measured by the DELPHI detector at LEP. The average production rates per hadronic Z decay have been determined to be 0.77 ± 0.08 K*0(892), 0.104 ± 0.008 ϕ(1020) and ⤪K2⇒t0(1430){⤪ K}_{2}^{⇒t 0}(1430). The ratio of the tensor-to-vector meson production yields, «ngle⤪K2⇒t0(1430)»ngle«ngle {⤪ K}_{2}^{⇒t 0}(1430)»ngle, is smaller than the 〈f2(1270)〉/〈ρ0(770)〉 and «nglef2⌕ime(1525)»ngle«ngle f_{2}^{⌕ime}(1525)»ngle ratios measured by DELPHI. The production rates and differential cross sections are compared with the predictions of JETSET 7.4 tuned to the DELPHI data and of HERWIG 5.8. The K*0(892) and ϕ(1020) data are compatible with model predictions, but a large disagreement is observed for the ⤪K2⇒t0(1430){⤪ K}_{2}^{⇒t 0}(1430).
  • electron positron: colliding beams
  • colliding beams: electron positron
  • electron positron: annihilation
  • annihilation: electron positron
  • Z0: electroproduction
  • electroproduction: Z0
  • Z0: hadronic decay
  • hadronic decay: Z0
  • K*(892): yield
  • K*2(1430): yield
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