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Linked List Segment Builder

Linked List Segment Builder. Major improvements as of t01.53.00 LL algorithm default in t01.54.00 Efficiencies Resolutions Timing Ran on single , 5-100 GeV. LL efficiency. Total efficiency: 97.8%. Combi efficiency. Total efficiency: 90.1%. Efficiency calculation.

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Linked List Segment Builder

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  1. Linked List Segment Builder • Major improvements as of t01.53.00 • LL algorithm default in t01.54.00 • Efficiencies • Resolutions • Timing • Ran on single , 5-100 GeV Linked List Segment reconstruction O. Peters

  2. LL efficiency Total efficiency: 97.8% Linked List Segment reconstruction O. Peters

  3. Combi efficiency Total efficiency: 90.1% Linked List Segment reconstruction O. Peters

  4. Efficiency calculation • MC segment requires two wire hits • Reco segment is found when it is close (dR < 40 cm) to MC segment • Efficiency takes out geometrical acceptance • But includes hit reconstruction efficiency • PDT single wire efficiency: 95% • MDT wire efficiency: 99% • ‘Real’ efficiency: 98.3% Linked List Segment reconstruction O. Peters

  5. LL central resolution Linked List Segment reconstruction O. Peters

  6. Vertex constraint • Use vertex to constrain A-layer segment • Valid for low pT tracks? O Linked List Segment reconstruction O. Peters

  7. LL central resolution with vertex constraint Linked List Segment reconstruction O. Peters

  8. Combi central resolution (with vertex constraint) Linked List Segment reconstruction O. Peters

  9. LL forward resolution Linked List Segment reconstruction O. Peters

  10. LL forward resolution with vertex constraint Linked List Segment reconstruction O. Peters

  11. Combi forward resolution (with vertex constraint) Linked List Segment reconstruction O. Peters

  12. Timing & errors • Optimized build on d0mino • Linked List algorithm: 9 ms/ • Combinatorial: 12 ms/ • Time on L3 node: unknown • Estimate 3-4 times faster than d0mino • Errors on segment need work • But first figure out errors on hits! Linked List Segment reconstruction O. Peters

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