Undergrad What are Stubbs in the CMS Tracker?

  • Thread starter Thread starter Silviu
  • Start date Start date
Click For Summary
Stubs in the CMS Tracker refer to short tracks formed by hits in the detector's layers, specifically requiring hits from at least four different layers for primary vertex finding. They are not accumulations of energy, which are associated with calorimeters, but rather indicate where both sides of the tracker have registered a hit at the same location. This functionality is crucial for accurately reconstructing particle trajectories in collider experiments. Understanding stubs is essential for analyzing data from the CMS detector effectively. Clarification on this topic helps enhance comprehension of particle tracking in high-energy physics.
Silviu
Messages
612
Reaction score
11
Hello! I am reading some stuff about the tracker of a detector in a particle collider and I am not sure I know what stubs are. They appear without any definition: "To be used for the primary vertex finding task, the resulting tracks must have stubs in at least four different tracker layers". I didn't really find a definition online. From this sentence I guess a stub is like an accumulation of energy in certain cells inside a layer of a tracker (those cells form the stub) but I am not totally sure. Can someone clarify this? (I am reading about the CMS detector) Thank you!
 
Physics news on Phys.org
A stub is a short track.
 
Accumulation of energy is something you'll find in a calorimeter, not a tracker.
The CMS tracking detector has several layers where both sides are instrumented, so you can look for places in the detector where both sides had a hit at the same place.
 

Similar threads

LHC about to restart - some frequently asked questions
  • · Replies 69 ·
3
Replies
69
Views
14K
What type of diode is best for protecting batteries in a weather station?
  • · Replies 22 ·
Replies
22
Views
2K
Programs What is an appropriate way of asking a professor for a project?
  • · Replies 4 ·
Replies
4
Views
2K
Ipad M4 11" or Galaxy Tab S9 Ultra?
  • · Replies 1 ·
Replies
1
Views
2K
Understanding Look Elsewhere Effect in Particle Physics
  • · Replies 2 ·
Replies
2
Views
2K
Schools Electrical Engineering Undergrad - WVU vs. Pitt
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad What is the purpose of the Prandtl Mixing Length for turbulent flow?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Label propagation equation: what are the terms?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate How to compute phase gradient from Snell's law?
  • · Replies 1 ·
Replies
1
Views
3K
Admissions Could I please get critique on my SOP? (Experimental Biophysics)
  • · Replies 8 ·
Replies
8
Views
805