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Draft: Beamline inclination implementation in beamlinePV

Bogdan Kutsenko requested to merge bokutsen_beam_inclination into 2024-patches

Requires : LHCb!4586

Beamline inclination for PV reconstruction is added separately for pp and SMOG:

  • For pp the inclination is estimated from InteractionRegion spread, which is filled by BeamSpotMonitor. This is a global inclination of the beamline relative to LHCb coordinates.
  • For SMOG the inclination angle is larger since it's a fixed target experiment. The half of an effective crossing angle should be taken as an inclination on x and y.

More details: https://indico.cern.ch/event/1401307/#6-effect-of-beamline-misalignm

New condition LHCInfo is added to LHCb using Detector!418 (merged) . The effective crossing angles from there are used for PV reconstruction

The systematical bias in reconstruction efficiency dependence from beam offset was observed in SMOG sample and presented. Following this, beamline inclination was included in TBLV, leading to a slight efficiency increase and lessening the SMOG sample's bias. TBLV was tested on the SMOG MC sample for 2024 :

Beamline Inclination taken into account Current default
Efficiencies, % False PVs, % Efficiencies, % False PVs, %
all 91.22 +- 1.29 1.23 +- 0.12 89.84 +- 1.27 1.29 +- 0.12
isolated 93.25 +- 1.35 0.15 +- 0.04 91.87 +- 1.33 0.16 +- 0.04
close 55.20 +- 3.66 25.56 +- 2.61 53.72 +- 3.59 26.46 +- 2.68
ntracks<10 84.49 +- 2.29 4.68 +- 0.44 81.93 +- 2.22 4.94 +- 0.46
ntracks>=10 93.77 +- 1.55 0.00 +- 0.00 92.84 +- 1.54 0.00 +- 0.00
z<=-50.0 91.22 +- 1.29 1.23 +- 0.12 89.84 +- 1.27 1.29 +- 0.12
z in (-50.0,50.0) 0 +- 0 0 +- 0 0 +- 0 0 +- 0
z>=-50.0 0 +- 0 0 +- 0 0 +- 0 0 +- 0
decayBeauty 0 +- 0 0 +- 0 0 +- 0 0 +- 0
decayCharm 0 +- 0 0 +- 0 0 +- 0 0 +- 0
decayStrange 91.78 +- 1.35 0.79 +- 0.10 90.54 +- 1.33 0.88 +- 0.10
other 84.76 +- 4.25 5.88 +- 0.86 81.78 +- 4.11 5.53 +- 0.84
1MCPV 97.28 +- 1.48 0.25 +- 0.05 96.50 +- 1.47 0.31 +- 0.06
2MCPV 57.49 +- 2.40 9.91 +- 1.09 53.12 +- 2.26 10.52 +- 1.16
3MCPV 43.26 +- 6.04 10.29 +- 3.91 33.33 +- 5.13 12.96 +- 4.94
4MCPV 0.00 +- 0.00 100.00 +- 81.65 0.00 +- 0.00 100.00 +- 100.00
5MCPV 0 +- 0 0 +- 0 0 +- 0 0 +- 0

pp_fakePVs_offset_2Dmap

pp_PV_rec_eff_offset_2Dmap

SMOG_fakePVs_offset_2Dmap

SMOG_PV_rec_eff_offset_2Dmap

Edited by Christopher Rob Jones

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