Exclusive LLP B0 -> K*0 DH Downstream Lines
This MR aims to add two exclusive turbo trigger lines for the decay B0 -> K*0 DH (->ll), where the DH stands for a Dark Scalar Boson that decays into two muons.
The two added lines are an adaptation of an already existing line that reconstructed the leptons as Long Tracks. The new lines reconstruct the leptons as Downstream Tracks and a mixture of Long and Down Tracks, respectively.
Checks for the new Trigger Lines:
Bandwidth w/o new lines: 379,53 MB/s Bandwidth w new lines: 379,53 MB/s
Change in Bandwidth: 0 MB/s
Rates: 0 Hz
Selection Efficiencies for the line depending on the mass hypothesis for the Dark Scalar Boson:
| Selection Eff. | 500 MeV | 1500 MeV | 2500 MeV | 3500 MeV |
|---|---|---|---|---|
| DD Line | 2.13% | 1.34% | 0.90% | 0.52% |
| LD Line | 0.02% | 0.09% | 0.13% | 0.11% |
The log file comparing the rate differences between the current configuration (run on all rd turbo lines using the scripts in https://gitlab.cern.ch/LHCb-RD/rd-rta-guide/-/tree/master/testing-utils?ref_type=heads) and the proposed configuration with the two new lines is attached.
Rate_Comparison_LL_LD_DD_Line.log
The distribution of the variables and the mass plots from the line outputs run over MC signal samples can be found here: https://cernbox.cern.ch/s/ecIgwIup61DGjSg
Info regarding the downstream track reconstruction changes:
MR: Rec!4434 (merged), last RTA presentation: https://indico.cern.ch/event/1565068/