Post on 22-Apr-2018
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