Draft: Beamline inclination implementation in beamlinePV
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 |
Edited by Christopher Rob Jones