EM Et distribution of the seeds for all L2 electrons
EM Et distribution of seeds vs nearest neighbors for all L2 electrons
Lego plot L1 Cal EM Towers and L2 Cal EM Towers - Event # 0
Lego plot L1 Cal EM Towers and L2 Cal EM Towers - Event # 2
Lego plot L1 Cal EM Towers and L2 Cal EM Towers - Event # 76
L1 Cal Neighbor ET showing eta and phi effects
EM Et distribution of seeds vs nearest neighbors in signal region 20 to 45 GEV
Nearest Neighbor delta Eta vs delta Phi for all L2 EM Objects
Nearest Neighbor delta Eta / delta Phi
with L1 EM ET > 15Gev
L1 EM ET Gev min % Delta Eta
% Delta Phi
0
64
36 - 8388 L2 EM objects
10
66
34
20
66
34
30
67
33
40
67
33
45
76
24 - only 248 L2 EM objects
50
83
17 - only 103 L2 EM objects
EM fraction of the seeds only in the signal region
EM fraction of the nearest neighbor in the signal region
L2 em fraction vs background rejection for
emfraction of standard and seed only
CEM triggered events - Special Run # 176363 - 3354 events
List of triggers that were used to generate these events
EM Et distribution of all seeds vs nearest neighbors for all L2 electrons
EM Et distribution of all seeds vs nearest neighbors in region of 4 to 14 Gev
Nearest Neighbor delta Eta / delta Phi with L1 > 1 Gev
Nearest Neighbor delta Eta / delta Phi with
L1 > 11 Gev
Type of triggers tried for single EM
Single EM efficiency vs rejection plots
DI-EM Studies
Background - delta phi matching 6 to 9 Gev L1 towers to 6 to 9 Gev L1 towers
Background - delta R matching 6 to 9 Gev L1 towers to 6 to 9 Gev L1 towers
Background - delta phi matching 9 to 11 Gev L1 towers to 3 to 6 Gev L1 towers
Background - delta R matching 9 to 11 Gev L1 towers to 3 to 6 Gev L1 towers
Background - delta phi matching > 11 Gev L1 towers to 1 to 3 Gev L1 towers
Background - delta R matching > 11 Gev L1 towers to 1 to 3 Gev L1 towers
*** NEW *** 3SEP03
The "standard" L3 electrons used for "good" electrons - em fraction > 0.95
The L2 em objects selected requiring that eta and phi be within +-0.75
The eta / phi distribution of the nearest neighbors - 64% eta 36% phi
The em energy of the NN - separated in eta and phi
A larger picture of the em energy of the NN
Putting a cut on the NN - NN > 2.0 GeV
The eta/phi distriubtion of the nearest neighbors with NN>2.0 GeV 55% eta 45 % phi
The em energy of the NN - separated in eta and phi with NN >2.0 GeV
Di-EM rejection plots
Using delta R >3.0 and delta phi <13.0 (detector
units - eta 0 to 39 and phi 0 to 31) vs EM ET
*** NEW *** 2OCT03
My "Good" electron sample - L3 ELE_LOOSE with
: Event with Vertex with two particles of at least 3 GeV each
: Event with two electrons matched to a track of at least 4.5 GeV each
: Of the above event - take the first two L3 electrons
: Em Fraction > 90% Et > 20 GeV
: The two electrons have an
invariant mass from 70 to 100 GeV
: L2 has matching EM objects with at least 80% of L3 energy
: L2 has matching EM object with at eta & phi with +/- 4 detector
units
----------------------------------------------------------------
L2 EM Objects in the Central region -1.0 < eta
< 1.0
Location of the Nearest Neighbor 82 % ETA 18% PHI
Seed
vs Nearest neighbor L1 Cal
Et
distributions of NN in eta & phi
Larger
picture of Et distributions of NN eta & phi
Et
distribution of all NN phis
L2 EM Objects in the Foward region -4.5 < eta < -1.0 or
1.0 < eta < 4.5
Location of the Nearest Neighbor 51% ETA 49 % PHI
Seed
vs Nearest Neighbor L1 Cal
Et
distributions of NN in eta & phi
Larger
picture of Et distributions of NN eta & phi
*** NEW ***08 OCT 03
Using the "good" electron sample from 2OCT03
L2 EM Objects in the Central regioin -1.0 < eta <
1.0
Ratio
plot of Et NN / Et Seed vs Total Et ( Et Seed + Et NN
)
Number
of hits vs Total Et
Ratio
plot of (Et NN / Et Seed) average vs Total Et
Plotting
Et of NN for ~ 30 GeV electrons (seed+nn)
Plotting
Et of NN for ~ 40 GeV electrons (seed+nn)
L2 EM Objects in the Foward region -4.5 < eta < -1.0 or
1.0 < eta < 4.5
Ratio
plot of Et NN / Et Seed vs Total Et ( Et Seed + Et NN
)
Number
of hits vs Total Et
Ratio
plot of (Et NN / Et Seed) average vs Total Et
Trigger efficiency studies show in Trigger Board
meeting 21NOV03
Isolation Fraction Concerns
Run #187708 - 2699 events
Isolation Fraction of all L2 EM Objects
Isolation Fraction of L2 EM Objects
> 4.75 GeV
Isolation Fraction of L2 EM Objects <
5.00 GeV
L2 Talk - Rejection 10FEB04
ppt
pdf
L2 EM - Extended Eta studies 7JUL04
D0analyze / (Trigsim + D0analyze) Eta
L2 EM - Seed and NN distribution 27OCT04
Electrons coming from Z.
1 track Match Eta
1 track Match Phi
2 track Match Eta
2 track Match Phi
