JetMET response without EE

1
Jet/MET responsewithout EE
PRS Physics Reconstruction and
Selection HCAL/JetsMET group

• Shuichi Kunori
• U. of Maryland
• 25-Oct-2001

2
EE vs no-EE
Resolution for pion (95 Test Beam
Data)
Jet/MET response ? Contributions Single
particle response resolution
e/pi eta-phi segmentation - coarse
without EE - dead material - more
with EE hermeticity - no
difference -
0.3
0.2
EEHE
0.1
HE
0
P 0
200
400GeV
3
EE vs no EEe/p
b
a
Single pion resolution without EE is
better e/pi with EE is better ? Who wins-
resolution or e/pi- for jets and MET?
4
Mass Z(120) ? j j
At least one jet in the endcap
Rad. off
Rad. off
b
a
FULL 12.7
FULL (LOSS 2) 13.4
No difference between FULL and no-EE!
Rad. off
Rad. on
c
d
FULL 21.7
no-EE 12.3
No fine tuning for energy scale.
5
MET in Z(120)?jj
Rad.off
Rad.off
a
b
no EE 14.7GeV
FULL 13.9GeV
? Not much difference
Rad.on
Rad.off
c
d
FULL (LOSS 2) 14.6GeV
FULL 15.7GeV
6
Summary

• No difference is seen with/without EE in
  Mass(Z(120)?jj).
• s(M) 12-13 without IR/FR (radiation).
• s(M) 22 with IR/FR.
• No difference is seen with/without EE in MET in
  Z(120)?jj sample
• s(MET) 14-15 without IR/FR.
• s(MET) 16 with IR/FR.
• We plan to check jets and MET response in
  different channels, e.g.
• Wide range of QCD bins
• Some physics signal channels.