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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

LHCb

Mapping the VELO Detector

By Abraham Jacob

Supervisors: Tom Latham and Tim Gershon


Introduction

Introduction


The vertex locator velo

The Vertex Locator (VELO)


Monte carlo mc and real data

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

Mapping ATLAS detector

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


Mc truth data

MC Truth Data

x (mm)

z (mm)


Mc data

MC data

x (mm)

z (mm)

RealData

x (mm)

z (mm)


Mc data1

MC data

RealData


Mc truth data1

MC Truth Data


Hadronic interactions in atlas

Hadronic interactions in ATLAS

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


Vertices with at least 3 output tracks

Vertices with at least 3 output tracks


Radius against z axis

Radius against Z axis


Error in z position in mm

Error in z position in mm


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