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Simulation Model for Barrel VTX Occupancy Estimates at 200 GeV: January 16, 2004

This document details a simulation model developed for estimating Barrel VTX occupancy under specific conditions using PYTHIA simulations (MSEL=1, PTJet > 10 GeV/c) and HIJING for central AuAu collisions at 200 GeV. It outlines the analysis chain generating VTX signals from GEANT hits without charge sharing. Acknowledgment is given to Manabu Togawa for future code improvements. This text serves as a preliminary analysis and should not be referenced in serious documentation.

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Simulation Model for Barrel VTX Occupancy Estimates at 200 GeV: January 16, 2004

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  1. V. L. Rykov January 16, 2004 Barrel VTX Occupancy (under)Estimates(By-product of code debugging) Disclaimer: NOT to be shown in any serious document.

  2. V. L. Rykov January 16, 2004 Simulation model • pp@200 GeV: PYTHIA,MSEL=1, PTJet>10 GeV/c. • Central AuAu@200 GeVNN:HIJING. • PISA withthe current VTX geometry in CVS. • Analysis chain with the primitivegeneration of VTX signals (Rawhits) from GEANT hits (Ghits) with no charge sharing between pixels/strips. Manabu Togawa promised to write some more reasonable code soon. Expect the the things to get worse by a factor of 1.5-2-?? … In the plots: • Column, from left to right= Barrel VTX layer • Upper row= x-strip or pixel channels • Lower row = u-strip channels

  3. V. L. Rykov January 16, 2004 pp@200 GeV, PTjet>10 GeV/c: Occupancy

  4. V. L. Rykov January 16, 2004 pp@200 GeV, PTjet>10 GeV/c: Ghit merge

  5. V. L. Rykov January 16, 2004 Central AuAu@200 GeVNN:Occupancy

  6. V. L. Rykov January 16, 2004 Central AuAu@200 GeVNN: Ghit merge

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