- Run at least as fast as the current version
- Efficiency for triggering prompt muons should be at least as high as in current version
- Robust against high pile-up
- Simpler to debug
- Higher efficiency for long-lived particles
- Higher efficiency for close muons
- Use modern CMSSW framework features
- Avoid duplication of code
- Adapt the code for the Pixel Upgrade
- check the iterative tracking modules to be the same as the TRK ones
- list of not used classes when switching to new L3
1) Seeding: One inside-out seeding algorithm using
For now we will use 1 seed collection. When we need to know if the seed was IO or OI we can just ask for its direction. We need to think about how the ROI will be created for the seed finding.
The OI algorithm will be a combination of state based and hit based. For OI state based the errors are rescaled, including alignment. For OI hit based we need to consider how many layers should be used, especially in the overlap region.
For the IO hit based algorithm we will reuse all the current tracking code. We need to consider how the window size will be created and whether we use the error matrix when calculating the size.
2) Regional (track) reconstruction
4) Final fit and parameter assignment
In New Design 1 for the production part there are 2 modules (EDProducers). The first produces a collection of L3 Tracks given a L2 muon track collection. The second produces L3 Muon track links collection are matching a L3 track with the L2 track. The following diagram describes the process:
Compared to the current design, described below there are fewer calls to read/write from the event bus (described by the blue bar in these diagrams). One of the motivations to have this in 2 modules instead of one is to perform the check on whether a seed generation algorithm needs to be activated or not by checking the currently available L3 tracks.
Running the New Code