Status of K S p e n

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Status of K S e • Summary of the results (bmw) • Pezzetto (small piece) • Results (amw) Claudio Gatti KLOE general meeting 11/2003 Roma La Sapienza

description

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

Transcript of Status of K S p e n

Page 1: Status of K S   p  e  n

Status of KS e

• Summary of the results (bmw) • Pezzetto (small piece)• Results (amw)

Claudio Gatti KLOE general meeting 11/2003 Roma La Sapienza

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Event counting Y2001 (Summary)

syst50

syst39

• BKG Data MC• MC BKG smearing: =2 MeV (???)• large syst. errors

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Furthermore, radiative corrections not included (??%)

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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!

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EmC

p

centroid

DC

Pezzetto(small piece)

centroideRcmnsbnsanst )/()()(

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Comparison including Pezzetto

Lower BKG and smaller asymmetry

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2 FITs

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ZOOM!!

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Subtracting the BKG ...

Ke3have E-p>0

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Systematical errors

Due to different selection efficiencies:

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Tuning and new cuts

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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