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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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Camilla di donato fabio ambrosino

3rdKLOE Workshop Physics

Status report

onf  h’ g

Camilla Di Donato

& Fabio Ambrosino


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

  • p+p-3g: Phys. Lett. B541 (2002)

  • p+p-7g: k. m. 268 and analysis updated in

  • rad-meeting 13-02-03


Camilla di donato fabio ambrosino

2000:p+p-3g

M (MeV)


Camilla di donato fabio ambrosino

2000:p+p-7g

Ep+ +Ep- (MeV)

c2/Ndof

data Ks p0 p0 Ks  p+p-g

Kl p+p-p0 Kl p0p0p0


Camilla di donato fabio ambrosino

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


Camilla di donato fabio ambrosino

2001:p+p-3g

100 pb-1 (2001)

M (MeV)


Camilla di donato fabio ambrosino

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


Camilla di donato fabio ambrosino

2000/2001/2002

2000

2001

2002

c2/Ndof

Ep+ +Ep- (MeV)


Camilla di donato fabio ambrosino

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


Camilla di donato fabio ambrosino

2001/2002

Accidental rate

acc/pb-1

run


Camilla di donato fabio ambrosino

DST-size

kb/pb-1

run

SEclu


Conclusions and outlooks

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;


Camilla di donato fabio ambrosino

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%


Camilla di donato fabio ambrosino

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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