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Measurements of the ratios B (D(s)+ ---> eta lepton+ neutrino) / B (D(s)+ ---> phi lepton+ neutrino) and B (D(s)+ ---> eta-prime lepton+ neutrino) / B (D(s)+ ---> phi lepton+ neutrino)

Collaboration
Aug, 1995
11 pages
Published in:
  • Phys.Rev.Lett. 75 (1995) 3804-3808
e-Print:
DOI:
Report number:
  • CLNS-95-1351,
  • CLEO-95-13
Experiments:
  • CESR-CLEO-II
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Abstract:
Using the CLEOII detector we measure B(Ds +→ηe +ν)/B(Ds +→ϕe +ν)=1.24±0.12±0.15{\cal B}(D_s~+\to \eta e~+\nu)/{\cal B}(D_s~+\to \phi e~+\nu) =1.24\pm0.12\pm0.15, B(Ds +→η′e +ν)/B(Ds +→ϕe +ν)=0.43±0.11±0.07{\cal B}(D_s~+\to \eta' e~+\nu)/{\cal B}(D_s~+\to \phi e~+\nu) =0.43\pm0.11\pm0.07 and B(Ds +→η′e +ν)/B(Ds +→ηe +ν)=0.35±0.09±0.07{\cal B}(D_s~+\to \eta' e~+\nu)/{\cal B}(D_s~+\to \eta e~+\nu) =0.35\pm0.09\pm0.07. We find the vector to pseudoscalar ratio, B(Ds +→ϕe +ν)/B(Ds +→(η+η′)e +ν)=0.60±0.06±0.06{\cal B}(D_s~+\to \phi e~+\nu)/{\cal B}(D_s~+\to (\eta+\eta') e~+\nu) =0.60\pm0.06\pm0.06, which is similar to the ratio found in non strange DD decays.
  • electron positron: colliding beams
  • colliding beams: electron positron
  • electron positron: annihilation
  • annihilation: electron positron
  • quark: charm
  • quark: pair production
  • pair production: quark
  • eta
  • eta(958)
  • Phi(1020)