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Search for Lambda+(c) ---> p K+ pi- and D+(s) ---> K+ K+ pi- using genetic programming event selection

Collaboration
•
Jul, 2005
10 pages
Published in:
  • Phys.Lett.B 624 (2005) 166-172
e-Print:
DOI:
Report number:
  • FERMILAB-PUB-05-343-E
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Abstract:
We apply a genetic programming technique to search for the double Cabibbo suppressed decays Λc+→pK+π−\Lambda_c^+ \to p K^+ \pi^- and Ds+→K+K+π−D_s^+ \to K^+ K^+ \pi^-. We normalize these decays to their Cabibbo favored partners and find BR(\text{BR}(\Lambda_c^+ \to p K^+ \pi^-)/BR()/\text{BR}(\Lambda_c^+ \to p K^- \pi^+)=(0.05±0.26±0.02)) = (0.05 \pm 0.26 \pm 0.02)% and BR(\text{BR}(D_s^+ \to K^+ K^+ \pi^-)/BR()/\text{BR}(D_s^+ \to K^+ K^- \pi^+)=(0.52±0.17±0.11)) = (0.52\pm 0.17\pm 0.11)% where the first errors are statistical and the second are systematic. Expressed as 90% confidence levels (CL), we find <0.46< 0.46 % and <0.78 < 0.78% respectively. This is the first successful use of genetic programming in a high energy physics data analysis.
  • 13.25.Ft
  • 13.30.Eg
  • Genetic programming
  • photon nucleus: inclusive reaction
  • beryllium: oxygen
  • Lambda/c+: photoproduction
  • Lambda/c+: hadronic decay
  • Lambda/c+: branching ratio
  • D/s+: photoproduction
  • D/s+: hadronic decay