Draft: New charm HLT2 line D0->Kst mu nu

Irene Celestinorequested to merge
2025_charm_reopt into master

New HLt2 line collecting the decay chain [D*(2010)+ -> (D0 -> (K*-(892) -> (KS0 -> pi+ pi-) pi-) mu+ nu) pi+]cc, with both long-long and downstream-downstream neutral kaons. More details on the physics motivation in this presentation: https://indico.cern.ch/event/1487741/contributions/6335563/attachments/3000600/5287572/Presentation_WGHLT2_22_01_2025.pdf

Total retention and rate, estimated using 325k events of "expected_2024_min_bias_hlt1_filtered_v2" MinBias:

  • Retention: (0.011 \pm 0.002)% for LL line and (0.028 \pm 0.003)% for DD line
  • Rate (assuming 1MHz of HLT1 output): 110 Hz for LL and 280 Hz for DD

Efficiency on signal Monte Carlo:

  • LL line: 1.41%
  • DD line: 1.03%

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