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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 (???) - PowerPoint PPT Presentation
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Status of KS e
• Summary of the results (bmw) • Pezzetto (small piece)• Results (amw)
Claudio Gatti KLOE general meeting 11/2003 Roma La Sapienza
Event counting Y2001 (Summary)
syst50
syst39
• BKG Data MC• MC BKG smearing: =2 MeV (???)• large syst. errors
Furthermore, radiative corrections not included (??%)
MC/DATA comparison
Emiss-pmiss (MeV) Emiss-pmiss (MeV)
MC normalized to data events in (20-40)
3500 ev/MeV
2500 ev/MeV
Why do we have this asymmetry? Different behavior of and in EmC!
EmC
p
centroid
DC
Pezzetto(small piece)
centroideRcmnsbnsanst )/()()(
Comparison including Pezzetto
Lower BKG and smaller asymmetry
2 FITs
ZOOM!!
Subtracting the BKG ...
Ke3have E-p>0
Systematical errors
Due to different selection efficiencies:
Tuning and new cuts
CONCLUSIONS
1. Good agreement between data+pezzetto and MC !!!!!!!!!!!!2. Radiative corrections included.3. Tuning of the cuts in progress.4. Ready to run on all 2001+2002 stat