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Draft: Add IFT HLT2 lines for decays into helium

Hendrik Jage requested to merge hage_ift_hlt2_he_lines into 2024-patches

Add new HLT2 lines for the 2024 data taking that search for decays into Helium3. The following decays are targeted:

  • hypertriton -> He3 pi-
  • Lambda_b0 -> He3 anti-proton anti-proton

As hypertriton is long-lived (similar lifetime as the Lambda0), a downstream (DD) line is added as well. The lines are supposed to be turbo lines, but raw banks of e.g. the UT and maybe RICH would be good to add.

This is currently only the development version. Final tuning is still needed. The current rates are:

Line:    Hlt2IFT_HypertritonToHePi_DD_VeloMatchDecision  Incl:   0.114 +/- 0.1139 kHz,  Excl:    0.0 +/- 0.0    kHz
Line:    Hlt2IFT_HypertritonToHePi_LLDecision            Incl: 38.3039 +/- 2.0542 kHz,  Excl: 38.076 +/- 2.0483 kHz
Line:    Hlt2IFT_HypertritonToHePi_SS_LLDecision         Incl:  3.534  +/- 0.6337 kHz,  Excl:   3.42 +/- 0.6234 kHz
Line:    Hlt2IFT_Lb0ToHePmPmDecision                     Incl:     0.0 +/- 0.0    kHz,  Excl:    0.0 +/- 0.0    kHz

They have been evaluated on 10k simulated minBias (expected_2024_min_bias_hlt1_filtered) events.

Edited by Hendrik Jage

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