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HAC energy associated to neutral and charged particles :
E=196GeV

$\includegraphics[width=7cm]{postscripts/196enhac2.eps}$ $\includegraphics[width=7cm]{postscripts/196echac2.eps}$

Visible energy
$\includegraphics[width=7cm]{postscripts/196evis.eps}$

The same effect is seen at 192 and 200 GeV
Is this effect responsible of the MC-DATA disagreement that I observe on variables like visible energy ? (also neutral energy, visible mass)
Was the problem there at 189 GeV ?

Preselection cuts :
- at least 6 charged particles reconstructed using VD-ID-TPC
- at least 1 particle with pt > 1.2 GeV/c
- Transverse energy > 25 GeV
The same cuts are perfomed on 189, 192, 196 and 200 GeV data.
Luminosities :
- L(189) = 158.0 pb-1
- L(192) = 25.9 pb-1
- L(196) = 76.9 pb-1
- L(200) = 57.8 pb-1
Number of events :

189 192 196 200

N data 16485 2447 7327 5227

N mc 16270 2563 7271 5263

	189	192	196	200
N data	16485	2447	7327	5227
N mc	16270	2563	7271	5263

RESULTS AT 192 GeV : (Get the postscript)
RESULTS AT 196 GeV : (Get the postscript)
RESULTS AT 200 GeV : (Get the postscript)
RESULTS AT 189 GeV : (Get the postscript)

Patrice Verdier
1999-09-22

Preselection cuts :

Luminosities :

Number of events :

RESULTS AT 192 GeV : (Get the postscript)

RESULTS AT 196 GeV : (Get the postscript)

RESULTS AT 200 GeV : (Get the postscript)

RESULTS AT 189 GeV : (Get the postscript)