CMS MASTERCLASS
User Guide Tutorial of ISpy and CIMA
THE TUTORIAL GOALS
 Study Z0, W+, W- particles created in the collisions.
Also study Rare H – (Higgs) decays
 Identification of the events with ISpy - Event Display
 Input results in CIMA Spreadsheet
IDENTIFICATION OF THE Z0, W+, W- , H EVENTS
Z0
W+
W-
Rare Higgs
Z0  e+ + e-
W+  m+ + n
W-  m- + n
H  Z0 Z0
Z0  m+ + m-
W+  e+ + n
W-  e- + n
Hϒϒ
2 leptons
Missing Energy < 15 GeV
1 leptons
Missing Energy > 20 GeV
4 leptons
Missing Energy < 15 GeV
or
2 photons
no Missing Energy limit
(e+, e- = Electron, m+, m- = Muon) = Lepton
ϒ = Photon
n = invisible, missing transverse energy
CMS DETECTOR COMPONENTS
Electron
Photon
Muon
ISPY - THE EVENT DISPLAY
Green Track + Mount = Electron
Big Green Mount (Without track)= Photon
Red Track = Muon
Purple Line = Missing Et
MUON, ELECTRON
μ-
positive
μ+
ee+
negative
IDENTIFICATION OF THE Z0, W+, W- , H EVENTS
Z
Rare Higgs
W±
Z0
Z0
e+
W+
e+
W-
e-
e-
ν
ν
μ+
μ+
μ-
Z0
W+
μ-
Pt < 15 Gev
W-
ν
Pt > 20 Gev
H
Pt < 15 Gev
H
ν
Z0
ϒ
ϒ
DETERMINE Z, W, AND HIGGS
e+
Z0
e-
μ+
Z0
μ-
e+
W+
ν
μ+
W+
ν
eWν
μWν
Z0
H
Z0
ϒ
H
ϒ
e+
DETERMINE Z, W, AND HIGGS BOSONS
Z0
e-
μ+
Z0
μ-
H
Z0
e+
W-
W+
ν
μ+
W+
ν
eWν
μW-
W-
ν
Z0
Z0
H
Zoo
Z0
ϒ
H
ϒ
ISPY & CIMA
CIMA
https://www.i2u2.org/elab/cms/cima/index.php
For Event Analysis
ISpy
https://www.i2u2.org/elab/cms/ispy-webgl/
For Event Display
ISPY
Zoom
Rotate
Previous Event
Next Event
Zoom In
YX View
Zoom Out
Move
ISPY (EVENT LOADING)
1
2
4
3
5
ISPY (HIDE/SHOW GEOMETRY)
Show Geometry
Hide Geometry
ISPY (HIDE/SHOW TRACKS)
Hide Tracks
ISPY (HIDE/SHOW )
Hide Tracks
ISPY MISS ENERGY (PT)
CIMA
2
1
3
RESULT INPUT
Z0 – electron – Event
1
2
3.53
RESULT INPUT
W+ – Muon– Event
If it is not possible to destinguish between
W+ and W-, enter a W candidate
RESULT INPUT
Higgs – Event
3.53
Missing Energy
SUMMARY
e+
Z0
e-
Charge
positive
pt < 15 GeV
Invariant mass
calculation
μ+
Z0
negative
μe+
W
positive
+
ν
μ+
W
pt > 20 GeV
+
ν
e-
W
-
ν
μ-
negative
W
-
ν
positive
Z0
H
pt < 15 GeV
Z0
negative
ϒ
H
ϒ
Zoo
(Background)
+
No limit
20 > pt > 15 GeV
CONCLUSIONS
 Ratio of e/µ from the number of electrons and muons
 Ratio of W+/W- from the number of W+/W- - candidates
 Mass distribution of the Z - and H  ZZ - candidates