New HLT2 SMOG2 DD line for Ks and Lambda & cut updates

This MR includes a series of updates to the HLT2 trigger lines for SMOG2 proton-gas operation. The updates include:

• Two new trigger lines for KS and Lambda reconstructed with two downstream tracks (Hlt2IFT_SMOG2KS2PiPiDD, Hlt2IFT_SMOG2Lambda02PPiDD), and a low mass dimuon same-sign line (Hlt2IFT_SMOG2LowDiMuonSS).
• Renaming of the previous KS and Lambda lines (Hlt2IFT_SMOG2Lamda02PPi, Hlt2IFT_SMOG2KS2PiPi) to (Hlt2IFT_SMOG2Lambda02PPiLL, Hlt2IFT_SMOG2KS2PiPiLL).
• Improving selection of the Hlt2IFT_SMOG2Lambda02PPiLL and Hlt2IFT_SMOG2KS2PiPiLL lines to reduce throughtput. A requirement in BPVIPchi2 of the parent is added, as well as a filter on the Lambda0 mass window (KS line) and KS mass window (Lambda line) using the wrong-mass functor. Requirements were tuned and tested with 2022 commissioning data.
• Removal of CC in lines where it creates duplicated candidates (Jpsi, Ks, Upsilon...).
• Tighten cuts and prescaling of hidden-charm lines (4K, 4pi and 2pi2K final-states) to reduce high throughput.
• Minimum-bias line Hlt2IFT_SMOG2GECPassthrough now uncommented since hlt1_filter_code works
• Add two new passthrough lines for HLT1 decisions: Hlt2IFT_SMOG2LumiPassthrough (passthrough for low multiplicity lines for pe scattering method), Hlt2IFT_SMOG2MBPassthrough (passthrough on HLT1 minimum bias lines, already prescaled in HLT1 and needed for some analyses)
• Prescaling of 1% of both SMOG2 HLT2 minimum-bias lines (Hlt2IFT_SMOG2GECPassthrough and Hlt2IFT_SMOG2Passthrough_PV_in_SMOG2)
• Updates for 2023 data: enlarge PVz window of SMOG2 (to -700,-300) and IP cut of daughters in D0->K-pi+ line is relaxed (to compensate the worse IP resolution with open VELO)

The line throughput has been tested with a series of simulation MB samples, using the HLT2 PV reconstruction algorithm PatPV3DFuture and without including the UT in the reconstruction:

• Throughput tests with simulation with expected 2023 conditions with PV distribution in SMOG2 and à la SMOG1, and with standalone pAr and pAr+pp: throughput_2023.pdf). Throughputs are shown with HLT2 standalone and HLT2 throughput of a HLT1-filtered dst.
• Throughput tests with simulation with embedded D0->Kpi and Jpsi->mumu signals with expected 2023 conditions with PV distribution in SMOG2 (pAr standalone): throughput_2023_D0Jpsi.pdf
• Throughtput tests with 2022 conditions, with standalone pAr and pAr+pp: throughput_2022.pdf (also HLT2 standalone and after HLT1 filtering).

Additionally, in order to test the Downstream-Downstream KS and Lambda lines, the lines have also been tested with older private MC samples with Upgrade datatype and using the UT in the reconstruction: throughput_withUT.pdf

All the throughput values are reasonable, and in all cases lower than for current HLT2 SMOG2 lines.

assigned to @oboenteg and @kmattiol

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Hey Oscar, thanks for this. We can talk better tomorrow at the hackathon, but would measure throughput efficiency on 2023 MC as well ;)

Hi Saverio, yes this is a good point, I will also do the tests with the 2023 simulation.

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• af1a0bf0 - Add prescales and tighter PID to hidden charm lines

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• 1a705a30 - Update requirements to HLT2 KS lines to reduce throughtput

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• 4851f35e - Fixed formatting

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• 3417f190 - Fix sign in veto window cut and other typos

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• 61465f5e - Prescale min bias lines and add LowMassDimuonSS line

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• 61465f5e...f126bffb - 6 commits from branch master
• e9d64212 - Remove CC for states for which is not needed to avoid duplicate candidates.
• d28011ae - Fix name of Lambda line
• bd4fa94d - Update KS and Lambda LL line and add DD lines
• 250eec7f - Fixed formatting
• b2af68cc - Fix pipeline
• 3f9bf963 - Add prescales and tighter PID to hidden charm lines
• f6574edd - Update requirements to HLT2 KS lines to reduce throughtput
• ffdc3b3d - Fixed formatting
• 3c758950 - Fix sign in veto window cut and other typos
• 1efafece - Prescale min bias lines and add LowMassDimuonSS line

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