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By Joanna Weng
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Additional resources for Parameterisation of electromagnetic showers and search for large extra dimensions in pp collisions at sqrt(s) = 14 TeV
Sample text
Configure − −enable − clhep 30 Chapter 2. The CMS software and set the environment variable CLHEPDIR to the installation path of CLHEP. dat) required to steer the event generation for a given process. /makelibs in your config directory. /SHERPA PATH = your config directory in SHERPA/Run starts the cross-section calculation and the actual event generation. dat in this case). The output file can then immediately be read in to OSCAR by the HepMC interface; During this work the relatively new OSCAR interface was systematically tested and improved, the HepMC interface to FAMOS was, since not available, completely newly developed and tested.
In φ, it is assumed that the energy is distributed uniformly due to symmetry: f (φ) = 1/2π. 13). 2. 37. The values of the coefficients used for the parameterisation are given in the Appendix B, where all formulas and numbers are summarised. The strategy has been here to follow as close as possible the numbers found by Peters and Grindhammer [67], provided that the comparison with fully simulated showers does not show unacceptable discrepancies. 42 are used, since they are found to be approximately normal distributed.
The variable τ = t/T is defined to measure the shower depth in units of the depth of the shower maximum, in order to generalise the radial profiles. This makes the parameterisation more convenient and separates the energy and material dependence of various parameters. The median of the core distribution, RC , increases linearly with τ . The weight of the core, p, is maximal around the shower maximum and the width of the tail, RT , is minimal at τ ≈ 1. 50) The parameters z1 · · · p3 are either constant or simple functions of ln E or Z (see Appendix B for details).