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A. Dabrowski, October 27 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

Comments

Γ(Ke3) / Γ(pipi0) Γ(Kmu3) / Γ(pipi0) Γ(Kmu3) / Γ(ke3)

Anne DabrowskiNorthwestern University

NA48/2 Collaboration Meeting30 November 2005

2 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

• Introduction• Comment about numbers in the first draft of the paper

– Form factor used was KTeV Pole for Ke3 and Kmu3 (In the October 2005 talk, the linear form factor was the nominal form factor used)

• Numerical Checks – can we trust PAW with weighted events?– A study comparing the Σweights PAW v.s. FORTRAN

• (important because systematic error due to form factor based on weighted events)

• Update– KLOE vs. Ginsberg + PHOTOS MC revisited

• Form factor normalisation • Acceptance comparison ke3

• Conclusion

Outline

3 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

Measurement of Ratios

A. Dabrowski, October 27 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

4

A. Dabrowski, October 27 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

Update

Comparison radiative corrections

Ginsberg + PHOTOS compared to KLOE

5 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

Report on KLOE vs Ginsberg+PHOTOs MC ke3

from Cambridge meeting, showed ridges in KLOE/Ginsberg MC

After checks with C. Gatti (From KLOE), numerical solution solved. Still a slope in the Dalitz plane. This slope will be investigated.

Cambridge

Now

Recall: October 2005

Meeting

6 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

Report on KLOE vs Ginsberg+PHOTOs MC ke3

from Cambridge meeting, showed ridges in KLOE/Ginsberg MC

After checks with C. Gatti (From KLOE), numerical solution solved. Still a slope in the Dalitz plane. This slope will be investigated.

Cambridge

Now

7 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

Report on KLOE vs Ginsberg+PHOTOs MC ke3

8 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

9 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

10 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

11 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

Acceptance Ginsberg+PHOTOS

Acceptance KLOE

Ke3+

Ke3-

12 A. Dabrowski, November 30 2005Ratio(ke3/pipi0); Ratio(kmu3/pipi0)

Conclusion

• Results of the draft version of the paper were shown today.

• I propose to release the neutrino mass cut in ke3 for final version on the paper, and to leave the neutrino mass cut in for kmu3.

• Numerical MC issue with KLOE vs. Ginsberg has been resolved.– MC being used at the moment

• Ke3 Ginsberg + PHOTOS (KLOE also available)• Kmu3 Ginsberg + PHOTOS (KLOE MC does not have the

lambda0 term of the matrix element yet)• Pipi0 KLOE