MEVSIM Simulation of Three Particle Correlations

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MEVSIM Simulation of Three Particle Correlations

Vasily Dzhordzhadze STAR Meeting, Yale
University July 01, 2008
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MEVSIM Simulation

• MEVSIM a fast MC generator (R. Longacre)
• Particle (p,k,p) and Resonance (r,w,f,D,K)
  production and flow in AuAu interactions at 200
  GeV
• Simulated 5M events in 1 bin of centrality
  40-50
• p 8, k 4, p -4 , r 10, w 10,
• f 10, D 10, K - 10
• p 112/-3, k 43/-3, p 37/-3
• r - 200/-3, w 200/-3, f 10/-1, D 25/-2
  K - 25/-3 Take 10 of resonances

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Experiment Run 4, AuAu 200 GeV
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Simulation MEVSIM, AuAu 200 GeV 5M events
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aiaj parameters Experiment vs Simulation (5M)
Exc.Res.

• Experiment
  Simulation (MEVSIM)
• Value Error
  Value Error
• 2.2948e-04 0.3642e-04 -0.1772e-04
  0.2950e-04 a-a- Y--
• 3.4155e-04 0.3880e-04 -0.0980e-04
  0.3235e-04 a-a- Y
• 2.8006e-04 0.2984e-04 -0.0383e-04
  0.2249e-04 a-a- Y-
• 3.4629e-04 0.3831e-04 0.0013e-04
  0.3172e-04 aa Y--
• 3.4626e-04 0.3530e-04 0.0532e-04
  0.2548e-04 aa Y
• 3.3951e-04 0.2916e-04 0.0264e-04
  0.4700e-04 aa Y-
• -0.3793e-04 0.2752e-04 -1.6749e-04
  0.2835e-04 aa- Y--
• -0.0387e-04 0.2712e-04 -0.9341e-04
  0.2629e-04 aa- Y
• -0.2045e-04 0.2176e-04 -1.3091e-04
  0.1975e-04 aa- Y-

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Simulation MEVSIM, AuAu 200 GeV 1M events
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Simulation MEVSIM, AuAu 200 GeV 5x1M events
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aiaj parameters Experiment vs Simulation (1M) 10
Res.

• Experiment
  Simulation (MEVSIM)
• Value Error
  Value Error
• 2.2948e-04 0.3642e-04 -0.0979e-04
  0.2331e-04 a-a- Y--
• 3.4155e-04 0.3880e-04 0.0158e-04
  0.2913e-04 a-a- Y
• 2.8006e-04 0.2984e-04 -0.0371e-04
  0.1911e-04 a-a- Y-
• 3.4629e-04 0.3831e-04 0.2596e-04
  0.2011e-04 aa Y--
• 3.4626e-04 0.3530e-04 0.2691e-04
  0.3379e-04 aa Y
• 3.3951e-04 0.2916e-04 0.2672e-04
  0.19729e-04 aa Y-
• -0.3793e-04 0.2752e-04 0.2952e-04
  0.1651e-04 aa- Y--
• -0.0387e-04 0.2712e-04 0.2724e-04
  0.1963e-04 aa- Y
• -0.2045e-04 0.2176e-04 0.2812e-04
  0.1050e-04 aa- Y-

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Summary

• Simulation of 5M events using MEVSIM program (Ron
  Longacre) for AuAu interaction for centrality bin
  of 40-50 was done -gt Study of the CP violation
  source
• Simulation of hadrons (p,k,p) and Resonances (r,
  w, f, D, K) with flow (taken from experiments)
  was made without detector respond simulation
• a-a- and aa parameters for simulated events are
  compatible with zero, while experimental values
  differ by 6.4, 9, 11.7 s
• aa- parameters for simulated events are differed
  from zero (3.6, 5.9 and 6.6 s) while experimental
  are compatible with zero
• Particle/Resonance flow doesnt explains observed
  experimental deviations of the 3 particle
  correlations

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