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Camilla Di Donato & Fabio Ambrosino

3 rd KLOE Workshop Physics. Status report on f  h ’ g. Camilla Di Donato & Fabio Ambrosino. P.L.B541(2002) : BR( f  h ’ g )=(6,10 ± 0,61 ± 0,43 )x10 -5. BR( f  h ’ g )=(7,05 ± 0,50 )x10 -5. +0,53 -0,46. f  h  g. BR( f  h  g ) measured on Y2K events

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Camilla Di Donato & Fabio Ambrosino

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  1. 3rdKLOE Workshop Physics Status report onf  h’ g Camilla Di Donato & Fabio Ambrosino

  2. P.L.B541(2002):BR(f  h’ g)=(6,10 ± 0,61 ± 0,43 )x10-5 BR(f  h’ g)=(7,05 ± 0,50 )x10-5 +0,53 -0,46 fhg • BR(fhg) measured on Y2K events • p+p-3g: Phys. Lett. B541 (2002) • p+p-7g: k. m. 268 and analysis updated in • rad-meeting 13-02-03

  3. 2000:p+p-3g M (MeV)

  4. 2000:p+p-7g Ep+ +Ep- (MeV) c2/Ndof data Ks p0 p0 Ks  p+p-g Kl p+p-p0 Kl p0p0p0

  5. 2001/2002 • 2001&2002 data: datarec V13 and V14 • Check eMC in progress: • MC processed with datarec V13-V14 • Accidental in EMC and DC for 2001 • and 2002 conditions • Filfo-EVCL: • Sub-sample from raw-data, without • filfo-evcl to study systematic

  6. 2001:p+p-3g 100 pb-1 (2001) M (MeV)

  7. 2001/2:p+p-7g L = 340 pb-1 N = 4691 events (no b.s.) c2/Ndof Ep+ +Ep- (MeV) data Ks p0 p0 Ks  p+p-g Kl p+p-p0 Kl p0p0p0

  8. 2000/2001/2002 2000 2001 2002 c2/Ndof Ep+ +Ep- (MeV)

  9. FILFO-EVCL • A minimum bias strategy to select data without filfo selection and without EVCL • in order to study systematics, has been tested • At least 3 prompt neutral clusters • qg>18º • SEclu > 500 MeV (all clusters) • SEclu > 500 MeV means 3.1 Gb/pb-1 • Lint = 50 pb-1 150 Gb

  10. 2001/2002 Accidental rate acc/pb-1 run

  11. DST-size kb/pb-1 run SEclu

  12. Conclusions and Outlooks • On 2000 data we have two compatible measurement; • 2001 and 2002 statistics analysed with reasonable results; • Waiting for MC with 2001-2002 run-condition and datarec V13-V14; • We will start a.s.a.p. to produce a sample from raw without filfo-evcl;

  13. 2001(2) Systematics: De/e filfo - evcl - vertex - D(N/e) /(N/e) Dz =±15% - Dq =±1° 2% DE =±10% - c2/Ndof (±1) -0,5%/+1,5% BR’’ 3% luminosity 1%-2% cross section 2.5%

  14. 2000 Systematics: De/e filfo 1.1% evcl 1.75% vertex 1.4% Total 2.5% D(N/e) /(N/e) Dz =±15% ±0.4% Dq =±1° ±4% DE =±10% -0.4%/+3.0% c2/Ndof (±1) -0.4%/+2.5% Total -4%/+6%

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