Reduce rates and bandwidth of IFT HLT2 lines with SMOG
This merge request tightens the selection of HLT2 SMOG2 lines for data-taking, reducing the smog2 impact into the rate and bandwidth. In particular, implemented changes are:
- update of HLT1 trigger line names following Allen!1497 (merged)
- general tightening of prescales in minimum-bias and light hadrons lines (Ks, Lambda, phi)
- Charm: reduce mass window (now same as in pp lines), tighten PID (now same as pp), rise pT cuts accordingly to smog2 HLT1 lines, implement new cuts on min_bpvltime, prescale four-body hidden charm lines (need more time to tune properly the selection)
- Muons: introduce loose pid requirement in low-mass dimuon line and in tag muon of PID line
- Tracking efficiency: require raw banks of trackers as they are needed to run sprucing on these lines
- Charged pid: apart from rising prescales, introduce new lines for "highPT" lambdas, to avoid loosing coverage in that part of the spectrum due to the prescale
Lines are tested in proton-argon+proton-proton simulation, asumming nu(pAr)=0.37 and nu(pp)=7.6. The correct proportion of pAr and pp interactions is used (note that official pAr+pp simulation does not give the correct proportion, as events with zero pAr interactions are not generated, being necessary to use a combined proportion of pp+pAr and pp standalone simulation).
The simulated sample is filtered with the HLT1 configuration of Allen!1497 (merged) and other tunnings from the bandwidth division (Allen samarian_tevans_tunedpp2024), currently giving a input rate of about 1304kHz in that MC sample, with hlt1_pp_matching_no_ut_tuned sequence and BW division tunning. [A caveat: the nu value used in simulation is an estimated value, as the cross-section has associated errors and the actual gas flux needs to be re-measured when a SMOG2 injection is made again (VELO needs to be closed)].
Total inclusive rate is 10 +/- 0.5 kHz, rates per line and by line group are summarized here:hlt2_SMOG2_testlines_MB_pAr_pp_fixed_SMOG2_expected2024_ALLIFT_fromHLT1Allen_samarian_tevans_tunedpp2024_4ac467af_Moore_oboenteg-smog2-hlt2-ratereduction_d6873a7b_evt_Full_withoutUT_TBLV.txt.
Tests are made with standard PV reconstruction (TBLV), recently updated for the SMOG2 region (Rec!3781 (merged)).
Per groups of lines, rates are distributed as such:
| Line Group | Inclusive Rate (kHz) | Exclusive Rate (kHz) |
|---|---|---|
| hlt2_muon lines | 1.47543 +/- 0.1737 | 1.41396 +/- 0.1701 |
| hlt2_charm lines | 3.44268 +/- 0.2652 | 3.25825 +/- 0.2580 |
| hlt2_generic lines | 0.47132 +/- 0.0982 | 0.45082 +/- 0.0961 |
| hlt2_chargedPID lines | 1.08608 +/- 0.1491 | 1.00411 +/- 0.1433 |
| hlt2_xiomegas lines | 0.57378 +/- 0.1084 | 0.53279 +/- 0.1044 |
| hlt2_tracking lines | 0.57378 +/- 0.1084 | 0.47132 +/- 0.0982 |
| hlt2_minbias lines | 1.72134 +/- 0.1876 | 1.68035 +/- 0.1854 |
| hlt2_femtoscopy lines | 1.10657 +/- 0.1505 | 1.08608 +/- 0.1491 |
| ------------ | ||
| Hlt2 IFT inclusive: | 10 +/- 0.5 kHz |
Per stream:
-
Turbo: hlt2_femtoscopy lines (1kHz) -
Full: rest of the lines (9 kHz)
Current bandwidth:
-
Turbo: 0.116Gb/s -
Full: 1.21Gb/s
All lines have persistReco=True. Additionally, hlt2_tracking lines persist the raw banks of VP, UT, FT and Muon, as they are needed to run these lines in the sprucing.