Noise and Cone Jets Vishnu V. Zutshi Northern Illinois University
Noise and Cone Jets
Vishnu V. ZutshiNorthern Illinois University
Introduction Does not aim to be the most
accurate representation of data (just a sensitivity study)
Noise is generated in pileup using single gaussian
QCD pt40 or neutrino events used No explicit non-linearity is introduced
Raw Noise
EM3 ~10-12 MeV
FH ~35-41 MeV
CH ~130-160 MeV
Noise without the flipped resistor and non-linearitygains applied to it.
Event CharacteristicsNo
noi
seNo zsup
Event Characteristics2*
raw-
noise 1.5
zsup
Event Characteristics2*
raw-
noise 2.0
zsup
Event Characteristics2*
raw-
noise 2.5
zsup
Matching to MCparticle jets
No n
oise
Matching to MCparticle jets
3*ra
w-no
ise2.5
zsup
Matching to MCparticle jets
3*ra
w-no
ise2.0
zsup
Matching to MCparticle jets
3*ra
w-no
ise1.5
zsup
Jet PositionTr
ue je
tsNoise jets
Jet Characteristics2*raw-noise (1.5
)Tr
ue je
ts (h
isto)
noi
se je
ts (
)
Jet CharacteristicsTr
ue je
ts (h
isto)
noi
se je
ts (
)2*raw-noise (1.5
)
Jet Characteristics2*raw-noise (1.5
)Tr
ue je
ts (h
isto)
noi
se je
ts (
)
Jet Response2*raw-noise
No-n
oise
() 1
.5(
) 2.
0(
) 2.5
()
Jet ResolutionNo
-noi
se()
1.5
()
2.0
() 2
.5(
)2*raw-noise
Jet Response3*raw-noise
No-n
oise
() 1
.5(
) 2.
0(
) 2.5
()
Jet ResolutionNo
-noi
se()
1.5
()
2.0
() 2
.5(
)3*raw-noise
Just Noise3*
raw-
noise
1.5 zsup
Just noise2*
raw-
noise
(hist
o) 3
*raw
-noi
se(•
)1.5
zsup
Just Noise2*
raw-
noise
(hist
o) 3
*raw
-noi
se(•
)1.5
zsup
Just Noise1.5
zsup2*
raw-
noise
(hist
o) 3
*raw
-noi
se(•
)
Just Noise2*
raw-
noise
(hist
o) 3
*raw
-noi
se(•
)1.5
zsup
Just Noise2.0
zsup2*
raw-
noise
(hist
o) 3
*raw
-noi
se(•
)
Just Noise2*
raw-
noise
(hist
o) 3
*raw
-noi
se(•
)2.0
zsup
Not Just Noise2.0
zsupNo
-noi
se(h
isto)
2*(
•) 3
*(
)
Just Noise (w/ -ve towers)Al
l tow
ers(
hist
o) o
nly
+ve(
•)
Jet Response (w/ -ve towers)
2*ra
w-no
ise 2.0 zsup
Jet Resolution (w/ -ve towers)
2.0 zsup
2*ra
w-no
ise
Seeds and Preclusters Default: 0.5 GeV on the seed 1.0 GeV on the 0.3 precluster Trial Modification: 1.0 GeV (seed), 2.0 GeV
(precluster) Can be made layer-dependent
Higher seed-precluster thresh.
{0.5
.1.0
}(hi
sto)
{1.
0,2.
0}(•
)1.5
(left) 2.0(center) 2.5
(right)
Forget CH?No
-noi
se
Layer-dependent ZS 2.0 zero suppression is applied to
all layers except for 15, 16 and 17 where it is 2.5
Layer-dependent ZS
Layer-dependent ZS