This lesson is in the early stages of development (Alpha version)

CMSDAS Trigger Short Exercise 2026

MET trigger efficiency

Overview

Teaching: 30 min
Exercises: 0 min
Questions
Objectives
  • Learn how to access and play with the trigger objects in our data

  • Compute the efficiency of a specific HLT path

  • Inspecting its Level 1 (L1) seed

The focus will be on some HLT paths used during the 2023 data-taking to select events with a certain amount of missing transverse energy HLT_PFMET*.

Key Points


Accessing Trigger objects

Overview

Teaching: 10 min
Exercises: 0 min
Questions
Objectives
  • Measure the efficiency of a single-muon trigger, namely HLT_IsoMu24_v with the tag-and-probe method

  • Learn to access trigger objects

Key Points


Trigger menus, rates, and paths

Overview

Teaching: 10 min
Exercises: 0 min
Questions
Objectives
  • These additional exercises provide some examples to familiarize with the L1 and HLT menus and to extract information about rates of the L1 and HLT algorithms.

Inspect trigger menus and trigger rates with the Online Monitoring System

Check the HLT menu used in production of a simulated sample

Retrieve the turn-on curve of a L1 seed

Modify the L1 menu using the Trigger Menu Editor

Key Points