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M. Adinolfi - University of Bristol1LHCb software week - 18/06/2009 Offline monitoring Marco Adinolfi University of Bristol.

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Presentation on theme: "M. Adinolfi - University of Bristol1LHCb software week - 18/06/2009 Offline monitoring Marco Adinolfi University of Bristol."— Presentation transcript:

1 M. Adinolfi - University of Bristol1LHCb software week - 18/06/2009 Offline monitoring Marco Adinolfi University of Bristol

2 M. Adinolfi - University of Bristol2LHCb software week - 18/06/2009 On/Off-line monitoring: We get the events we want to the right task. Histograms are produced. We can retrieve them from the grid/online farm. They get analyzed. ×There are enough histograms to find and understand problems. Computing: Flagging as OK in book-keeping triggers reconstruction. ×Stripping, streaming …. Quality: ×MC data ×Aligned, calibrated… We can pretend it is misaligned and miscalibrated ×Patch, tag, distribute database, re-reconstruct Small progress…?

3 M. Adinolfi - University of Bristol3LHCb software week - 18/06/2009 Monitoring… We do find the problems! Wrong conditions tag used in reconstruction. Zero magnetic field immediately found from the histograms.

4 M. Adinolfi - University of Bristol4LHCb software week - 18/06/2009 J/Ψ signal Running at 1.8 kHz mb + 10 Hz signal. J/Ψ reconstructed both as μμ and μπ. K 0 and Λ peaks.

5 M. Adinolfi - University of Bristol5LHCb software week - 18/06/2009 J/Ψ signal (2 - from Wouter) EXPRESS contains 5Hz min. bias + all J/Ψ events. J/Ψ -> μμ in trigger in the first 1000 events of the FULL and EXPRESS streams. HLT banks not yet checked.

6 M. Adinolfi - University of Bristol6LHCb software week - 18/06/2009 J/Ψ signal (3 - from Wouter) Use vertex and mass constraint (see Wouter presentation at the alignment workshop). μμ mass vs. p(μ + ) – p(μ - ). Very sensitive to misalignment. Wrong constants were used. Without constraint With constraint

7 M. Adinolfi - University of Bristol7LHCb software week - 18/06/2009 Stripping Two different issues (see Patrick presentation yesterday) Brunel: Stripping was never tested with recent data and latest Brunel. A lot has changed on the DaVinci side, which has effects on Brunel Needs 3 patches in Configuration.py DaVinci: To select data I need : "COLLECTION=’TagCreator/EventTuple’ DATAFILE=’"+fname+"’ TYP=’POOL ROOT’ SEL=’(StrippingB2Charged2Body>0) || (StrippingB2DPi>0) || (StrippingBd2JpsiKSLine>0) || (StrippingBd2JpsiKstLine>0) || (StrippingBd2KstarMuMu 10Hz>0) || (StrippingBs2JpsiPhiLine>0) || (StrippingBu2JpsiKLine>0) || (StrippingTopo>0)’“ DIRAC needs to set fname, but we don’t want to hard-code all selections. Need one selection that is an or of all others.

8 M. Adinolfi - University of Bristol8LHCb software week - 18/06/2009 Much already achieved but we still wish to: Fix some issues with presenter, odd crashes.. Improve distribution of information: typical example the wrong conditions tag. System to make histograms available to experts. Test the whole stream. Normal case: stripping, streaming… Problems case: alignment and calibration, re-reconstruction, validation, new tag distribution. Simulate different triggers. Add L0 simulation. Coordinate more with sub-detectors DQ experts. Wish list

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