Introduction to the CMS Trigger: Glossary

The CMS trigger system filters uninteresting events, keeping the budget high for the flow of interesting data.

Computationally, a trigger is a CMSSW path, which is composed of several software modules.

Trigger prescales allow the data acquisition to adjust to changes in instantaneous luminosity while keeping the rate of incomming data under control

The trigger systems allows for the classification and organization of datasets by physics objects of interest

It is possible to retrieve trigger information from miniAOD files directly

Trigger objects should be check against reconstructed objects

A lot more information related to trigger can be obtained from the HLTConfigProvider and HLTPrescaleProvider and the conditions database

We will be working with pre-filtered data samples later in the workshop