3 rd KLOE Workshop Physics Status report on

3 rd KLOE Workshop Physics Status report on f h’ g Camilla Di Donato & Fabio Ambrosino

f h g BR(f h g) measured on Y 2 K events • p+p-3 g: Phys. Lett. B 541 (2002) P. L. B 541(2002): BR(f h’ g)=(6, 10 ± 0, 61 ± 0, 43 )x 10 -5 • p+p-7 g: k. m. 268 and analysis updated in rad-meeting 13 -02 -03 +0, 53 BR(f h’ g)=(7, 05 ± 0, 50 -0, 46 )x 10 -5

2000: p+p-3 g M (Me. V)

2000: p+p-7 g E + +E - (Me. V) data Ks 0 0 Kl + - 0 c 2/Ndof Ks + - Kl 0 0 0

2001/2002 2001&2002 data: datarec V 13 and V 14 Check e. MC in progress: 1. MC processed with datarec V 13 -V 14 2. Accidental in EMC and DC for 2001 and 2002 conditions • Filfo-EVCL: Sub-sample from raw-data, without filfo-evcl to study systematic

2001: p+p-3 g -1 b p 0 ) 1 0 0 2 ( 10 M (Me. V)

2001/2: p+p-7 g data L = 340 pb-1 N = 4691 events (no b. s. ) E + +E - (Me. V) Ks 0 0 Kl + - 0 c 2/Ndof Ks + - Kl 0 0 0

2000/2001/2002 2000 2001 2002 c 2/Ndof Ep+ +Ep- (Me. V)

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 Me. V (all clusters) SEclu > 500 Me. V means 3. 1 Gb/pb-1 Lint = 50 pb-1 150 Gb

2001/2002 acc/pb-1 Accidental rate run

DST-size kb/pb-1 run SEclu

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 V 13 -V 14; • We will start a. s. a. p. to produce a sample from raw without filfo-evcl;

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

2000 Systematics: filfo evcl vertex Total De/e 1. 1% 1. 75% 1. 4% 2. 5% D(N/e) /(N/e) Dz =± 15% Dq =± 1° DE =± 10% c 2/Ndof (± 1) ± 0. 4% ± 4% -0. 4%/+3. 0% -0. 4%/+2. 5% Total -4%/+6%