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

, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , and . Physics Letters B, B624 (3-4): 166--172 (29 September 2005)
DOI: doi:10.1016/j.physletb.2005.08.032

Abstract

We apply a genetic programming technique to search for the doubly Cabibbo suppressed decays +c to pK+p- and D+s to K+K+p-. We normalise these decays to their Cabibbo favoured partners and find BR(to pK+p-)/BR(to pK-p+) = (0.05 0.26 0.02)% and BR(D+s to K+K+p-)/BR(D to K-K+p+) = (0.52 0.17 0.11) percent where the first errors are statistical and the second are systematic. Expressed as 90 percent confidence levels (CL), we find < 0.46 percent and < 0.78 percent respectively. This is the first successful use of genetic programming in a high energy physics data analysis.

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