User Guide Tutorial of ISpy and CIMA 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 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

CMS Detector components

Electron

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

Muon

ISPY - the Event Display

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

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

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

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

determine Z, W, and Higgs bosons ν W+ e+ W- e- μ+ μ- Z0 H ϒ H Z0 W- W- Z0 Zoo

Ispy & CIMA CIMA ISpy For Event Analysis For Event Display 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 Move Zoom In YX View Previous Event Next Event Zoom Out

Ispy (Event loading) 2 1 4 3 5

Ispy (Hide/Show Geometry) Hide Geometry

Ispy (Hide/Show Tracks) Hide Tracks

Ispy (Hide/Show ) Hide Tracks

Ispy Miss energy (PT)

CIMA 1 2 3

2 1 3.53 Result Input Z0 – electron – Event

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

Summary Zoo (Background) pt < 15 GeV Invariant mass calculation ν 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

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