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Primary Vertex Reconstruction: results on first collisions data Runs: 104030, 104044 (ITS only) 104065, 104070 (all detectors) Trigger configuration: DSMBC.

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Presentation on theme: "Primary Vertex Reconstruction: results on first collisions data Runs: 104030, 104044 (ITS only) 104065, 104070 (all detectors) Trigger configuration: DSMBC."— Presentation transcript:

1 Primary Vertex Reconstruction: results on first collisions data Runs: , (ITS only) , (all detectors) Trigger configuration: DSMBC 0SMB 0BPC DSMBB 0SMB 0BPA 0BPC DSMBA 0SMB 0BPA Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese INFN Padova.

2 Mean vtx VS tstamp Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 1 Run (the first one) seems to have different mean for x and z but…

3 Run Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 2 Low number of entries and constraining the fit: Mean cm Mean cm RMS 8.20 cm Sigma 3.44 cm

4 SPD vertex Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 3 X: mean µm sigma 474 µm Z: mean cm sigma 3.7 cm Y: mean cm sigma 500 µm

5 Tracks vertex Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 4 X: mean µm sigma 312 µm Z: mean cm sigma 3.5 cm Y: mean cm sigma 332 µm

6 TPC vertex Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 5 X: mean cm sigma 0.39 cm Z: mean cm sigma 3.6 cm Y: mean cm sigma 0.38 cm

7 Tracks VS SPD vertex Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 6

8 TPC VS SPD vertex Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 7

9 Contributors Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 8 SPD multiplicityITS tracks with nclust>4 TPC tracks TPC track with Nclus > 0 pointing at the beam pipe

10 Vertex mean VS multiplicity Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 9

11 Vertex RMS VS multiplicity Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 10

12 Vertex efficiency VS multiplicity Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 11 Black: Z vertex Red: 3D vertex

13 Beam spot: Data and MC (I) Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 12 DATA LHC09d7

14 Beam spot: Data and MC (II) Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 13 DATA LHC09d7

15 Runs (all detectors) DINT1B 0BPA 0BPC l0fINT1 DINT1C 0BPC *0BPA l0fINT1 DINT1A 0BPA *0BPC l0fINT1 DBEAMB 0BPA 0BPC Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 14

16 Vertex mean VS tstamp Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 15

17 SPD vertex Padova, 09/11/09 Corso di dottorato XXIV ciclo Davide Caffarri CERN, 07/12/09 First Physics Meeting Davide Caffarri – Andrea Dainese 16 X: Mean -780µm Sigma 460µm Y: Mean cm Sigma 480 µm Z: Mean -3.3 cm Sigma 3.85 cm


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