Higgs candidate events from CMS 2011 and 2012 open data release selected in the Higgs-to-four-lepton analysis example

iSpy-WebGL

A browser-based event display for the CMS experiment at the LHC using WebGL

Questions/comments/problems

Code and Issues

Contributors: L. Barnard, M. Hategan, C. Logren, T. McCauley, P. Nguyen, M. Saunby

This application uses three.js

Tracker:

Silicon and pixel detectors used to detect passage of charged particles

ECAL Barrel:

Central electromagnetic calorimeter; measures energy of electrons and photons

ECAL Endcap:

Electromagnetic calorimeters at either end of CMS for measurements close to the beam axis

HCAL Barrel:

Central hadronic calorimeter; measures energy of hadrons

HCAL Endcap:

Hadronic calorimeters at either end of CMS, close to the beam axis

HCAL Outer:

Hadronic calorimeter layer just outside the solenoid magnet

HCAL Forward:

Hadronic calorimeters farther down and very close to the beam axis

Drift Tubes (DT):

Central muon chambers outside the solenoid and HCAL Outer

Cathode Strip Chambers (CSC):

Forward muon detectors

Resistive Place Chambers (RPC):

Solid state muon detectors

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Imported geometry models such the beam pipe.

Event:

Each event is distinguished by a run number, event number, luminosity section, and time stamp

Tracks (reco.):

Reconstructed particle tracks in the tracker

Rec. Hits (Tracking):

All particle hits in the tracker

Barrel Rec. Hits:

Energy in a single ECAL crystal

Endcap Rec. Hits:

Hits in ECAL Endcap

Preshower Rec. Hits:

Hits in ECAL Preshower

Barrel Rec. Hits:

Energy in a single HCAL tile

Endcap Rec. Hits:

Hits in HCAL Endcap

Forward Rec. Hits:

Hits in HCAL Forward

Outer Rec. Hits:

Hits in HCAL Outer

Matching muon chambers:

The muon chambers (drift tubes and/or cathode strip chambers) that correspond to the reconstructed muon

DT Rec. Hits:

Muon hits in Drift Tubes

DT Rec. Segments:

Muon track segments in Drift Tubes

CSC Segments:

Muon track segments in Cathode Strip Chambers

RPC Rec. Hits:

Muon hits in Resistive Plate Chambers

CSC Rec. Hits:

Muon hits in Cathode Strip Chambers

Electron Tracks (GSF):

Reconstructed candidate electron tracks in the tracker

Photons (Reco):

Inferred photon trajectories

Tracker Muons (Reco):

Reconstructed muon tracks in tracker

Stand-alone Muons (Reco):

Reconstructed muon track segments in muon chambers

Global Muons (Reco):

Reconstructed complete muon tracks, combining tracker and stand-alone muons

Jets:

Collimated streams of particles

MET:

Missing transverse energy