Final Challenge

Last updated on 2026-07-12 | Edit this page

Overview

Questions

  • Information on the final challenge

Objectives

  • Solve the final challenge!

Download your file

Using the clues from tasks 1-8, download your file. Insert your solutions into the file path below to construct the required path and grab this file!

  • epic:/RECO/XX.YY.Z/epic_craterlake/DIS/NC/IIxJJ/minQ2=KK/pythia8NCDIS_IIxJJ_minQ2=KK_beamEffects_xAngle=-0.025_hiDiv_A.BBBB.eicrecon.edm4eic.root
    • XX - Your clue from task 1
    • YY - Your clue from task 2
    • Z - Your clue from task 3
    • II - Your clue from task 4
    • JJ - Your clue from task 5
    • KK - Your clue from task 6
    • A - Your clue from task 7
    • BBBB - Your clue from task 8
Callout

Hint:

  • Don’t forget, the clues come from the answer checker on each task page!

DID Check

If you want to double check you got the correct DID and your plugged in the task clues correctly, use the checker form below:

Final Challenge

With the DID you’ve constructed from your clues, download or stream this file and the next 9 files in this set such that you have ten files total. Simply increment the BBBB value to get the next in the sequence.

From these ten files, identify using the ‘MCParticles’ and ‘ReconstructedParticles’ collection along with their associations:

  1. All of the electrons that reconstruct in the central detector
  2. All of the photons that reconstruct in the central detector

For each set of particles, produce a 2D colour plot of the true (MC) pseudorapidity (eta) vs |P|. Set the colour pallete for your plots using the number of MC particles in the 237th event. E.g. gStyle->SetPalette(#MC_Parts);. If you aren’t using ROOT, check the colour palette this corresponds to and set a similar palette.

Upload these as a single pdf or png using the submission link below.

Callout

Hint:

  • Use the pseudorapidity range of -5 to 5 and |P| range of 0 to 50.
  • Use bin sizes of 0.1 for pseudorapidity and 0.25 for|P|.

Answer Submission

Submit your final answer using the answer submission form - good luck!

Key Points
  • Solve the final challenge!