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LHCb. Mapping the VELO Detector By Abraham Jacob Supervisors: Tom Latham and Tim Gershon. Introduction. The Vertex Locator (VELO). Monte Carlo (MC) and Real Data. Monte Carlo algorithms can produce simulated data Can “reconstruct” the vertex in same way as real data

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LHCb

Mapping the VELO Detector

By Abraham Jacob

Supervisors: Tom Latham and Tim Gershon


Introduction


The Vertex Locator (VELO)


Monte Carlo (MC) and Real Data

  • Monte Carlo algorithms can produce simulated data

  • Can “reconstruct” the vertex in same way as real data

  • Also MC truth data where vertex locations are known

  • Want to compare the simulated data to real data to make sure simulation algorithms are as good as possible

Unfortunately not this Monte Carlo.


Mapping ATLAS detector

Images from ATLAS collaboration presented at ICHEP, Paris, July 22nd 2010.


MC Truth Data

x (mm)

z (mm)


MC data

x (mm)

z (mm)

RealData

x (mm)

z (mm)


MC data

RealData


MC Truth Data


Hadronic interactions in ATLAS

Images from ATLAS collaboration presented at ICHEP, Paris, July 22nd 2010.


Vertices with at least 3 output tracks


Radius against Z axis


Error in z position in mm


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