GRAPHICAL CONCEPTS FOR THE REPRESENTATION OF EVENTS IN HIGH ENERGY PHYSICS

H. Drevermann and C. Grab
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H. Drevermann: CERN, CH-1211 Geneva 23, Switzerland
C. Grab: CERN, CH-1211 Geneva 23, Switzerland

International Journal of Modern Physics C (IJMPC), 1990, vol. 01, issue 01, 147-163

Abstract: Different methods to graphically represent points and tracks of events, measured with the ALEPH-detector at LEP, are discussed. Special emphasis is put on projections, that are adapted to the cylindrical geometry of the detector, to the track geometry of charged particles moving in a homogeneous magnetic field and to the event topologies, encountered inZ0physics.A new concept, the so-called "V-plot", is introduced, which incorporates the full three-dimensional information of spatial points in a single picture. It is ideally suited for the study of more complicated event topologies, such as e.g. decays of particles within jets, and of the correlation between tracks and calorimeter clusters.In addition, we propose ways of combining histograms and projections to incorporate the tracking and calorimetric information into a single picture. We describe methods of employing colour schemes to facilitate recognition of correlations between hits, tracks and/or subdetectors in different representations.

Date: 1990
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DOI: 10.1142/S0129183190000074

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