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Status of K S  p e n

Status of K S  p e n. Summary of the results (bmw) Pezzetto (small piece) Results (amw). Claudio Gatti KLOE general meeting 11/2003 Roma La Sapienza. Event counting Y2001 (Summary). BKG Data  MC MC BKG smearing: s =2 MeV (???)

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Status of K S  p e n

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  1. Status of KS p e n • Summary of the results (bmw) • Pezzetto (small piece) • Results (amw) Claudio Gatti KLOE general meeting 11/2003 Roma La Sapienza

  2. Event counting Y2001 (Summary) • BKG Data  MC • MC BKG smearing: s=2 MeV (???) • large syst. errors

  3. Furthermore, radiative corrections not included (??%)

  4. MC/DATA comparison MC normalized to data events in (20-40) 3500 ev/MeV 2500 ev/MeV Emiss-pmiss (MeV) Emiss-pmiss (MeV) Why do we have this asymmetry? Different behavior of p+ and p- in EmC!

  5. centroid EmC DC p Pezzetto (small piece)

  6. Comparison including Pezzetto Lower BKG and smaller asymmetry

  7. 2 FITs

  8. ZOOM!!

  9. Subtracting the BKG ... Ke3g have E-p>0

  10. Systematical errors Due to different selection efficiencies: e+ < e- (2-3%)

  11. Tuning and new cuts

  12. CONCLUSIONS • Good agreement between data+pezzetto and MC !!!!!!!!!!!! • Radiative corrections included. • Tuning of the cuts in progress. • Ready to run on all 2001+2002 stat

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