1. User Guide Tutorial of ISpy and CIMA
CMS Masterclass
User Guide Tutorial of ISpy and CIMA

2. 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

3. Identification of the Z0, W+, W- , H events
Rare Higgs W-
Z0  e+ + e- W+  m+ + n W-  m- + n H  Z0 Z0
Z0  m+ + m- W+  e+ + n W-  e- + n H  ϒ ϒ
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

4. CMS Detector components

5. Electron

6. Photon
Photon: passes through the tracker without bending in the magnetic field or leaving hits, is “stopped” by the electromagnetic calorimeter

7. Muon

8. ISPY - the Event Display

9. Green Track + Mount = Electron
Red Track = Muon
Big Green Mount (Without track)= Photon
Purple Line = Missing Et

10. Muon, Electron μ- e-
positive
negative μ+ e+

11. Identification of the Z0, W+, W- , H events
Rare Higgs Z0 e+ e- μ+ μ- Z W± H Z0 ν W+ e+ W- e- ν
Pt < 15 Gev ν W+ μ+ ν W- μ- H ϒ
Pt < 15 Gev
Pt > 20 Gev

12. determine Z, W, and Higgs ν W+ e+ W- e- μ+ μ- Z0 H ϒ

13. determine Z, W, and Higgs bosonsν W+ e+ W- e- μ+ μ- Z0 H ϒ H Z0 W- W- Z0
Zoo

14. Ispy & CIMA CIMA ISpy For Event Analysis For Event Display
For Event Analysis
ISpy
For Event Display

15. Ispy Zoom Rotate Move Zoom In YX View Previous Event Next Event
Zoom Out

16. Ispy (Event loading) 2 1 4 3 5

17. Ispy (Hide/Show Geometry)
Hide Geometry

18. Ispy (Hide/Show Tracks)
Hide Tracks

19. Ispy (Hide/Show )
Hide Tracks

20. Ispy Miss energy (PT)

21. CIMA 1 2 3

22. 2 1
3.53
Result Input
Z0 – electron – Event

23. Result Input W+ – Muon– Event
If it is not possible to destinguish between W+ and W-, enter a W candidate

24. Result Input
Higgs – Event
3.53

25. Summary Zoo (Background) pt < 15 GeV Invariant mass calculationν W+ e+ W- e- μ+ μ- Z0 H ϒ
pt < 15 GeV
pt > 20 GeV
Zoo (Background)
20 > pt > 15 GeV
Missing Energy
positive
negative
Charge
No limit +
Invariant mass
calculation

26. 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