HCAL Simulation Notes

Where an electronic version exists, a link is provided. I can provide a hard copy where an electronic version does not exist; contact me at womersley@fnal.gov.

• "Jet Energy Resolution of the SDC Detector"

  A. Para, W. Wu, et al., SDC-90-00149, Fermilab-TM-1720, December 1990.
  Mass resolution for Z -> jj and Z'(1 TeV) -> jj. (Response to SSC PAC question). Simulation includes effects of cell-size, cell energy thresholds, magnetic field, energy resolution, and nonlinearity.

• "Depth Requirements in SSC Calorimeters"

  W. Wu et al., Fermilab-FN-570, August 1991.
  Depth requirements from dijet resolution and muon punchthrough. Leakage based on data from various experiments (WA1, CDHS, CFRR...)

• "Compensation in Calorimeters for Jets and Hadrons"

  D. Green, A. Para, W. Wu, Fermilab-FN-572, September 1991.
  Simple model for e/h and e/pi in a segmented ECAL+HCAL system.

• "Massless Gaps for Solenoid + Calorimeter"

  W. Wu et al., Fermilab-TM-1766, November 1991.
  Recovering EM calorimeter resolution using a thin layer following the coil, for the SDC design (with the coil in front of ECAL).

• "Monte Carlo Simulation of Compensation in a Calorimeter"

  W. Wu et al., Fermilab-FN-579, January 1992.
  No copy in hand.

• "Hadronic Energy Resolution and Radiation Damage"

  A. Beretvas et al., Fermilab-FN-582, March 1992.
  Induced nonlinearity and constant term in the energy resolution resulting from radiation damage.

• "A Weighting Strategy for Compensating Leakage in the SDC Electromagnetic Calorimeter"

  A. Beretvas et al., Fermilab-FN-587, April 1992.
  Use of longitudinal segmentation with appropriate weighting in order to mitigate effects of finite HCAL depth,

• "Hadronic and Electromagnetic Transverse Calorimeter Segmentation"

  W. Wu et al., Fermilab-FN-589, December 1992.
  Dijet resolution vs. transverse cell size for low-pT Z -> jj, high-pT Z ->jj, and high-mass Z' -> jj. Fig. 1 demonstrates that delta eta x delta phi ~ 0.1 x 0.1 is adequate.

• "A study of the Process H(800) -> Z1 Z2, Z1 -> qqbar, Z2 -> tau1 tau2, tau12 -> rho nu for the SDC Calorimeter"

  W. Wu et al., Fermilab-FN-598, November 1992.
  Importance of forward calorimeter coverage for missing ET measurement in order to reconstruct the Z -> tau tau decay.

• "Use of a Shower Maximum Detector to Reduce Radiation Damage Sensitivity in EM Calorimeter"

  A. Beretvas et al., Fermilab-FN-600, December 1992.
  Use of a shower maximum detector to compensate for radiation damage in a scintillator calorimeter.

• "SSCSIM: Development and Use by the Fermilab SDC Group"

  A. Beretvas et al., Fermilab-FN-601, February 1993.
  Presented at MC93 (International Conference on Monte Carlo Simulation in High Energy and Nuclear Physics); proceedings published by World Scientific, 1993.
  Description of the parametrized simulation package used for SDC and CMS simulations at Fermilab.

• "Detection of Higgs -> gamma gamma by the SDC Detector"

  W. Wu et al., Fermilab-FN-603, April 1993.
  Comparison of different ECAL resolutions on Higgs signal. Not really relevant for CMS or for the HCAL.

• "How to Optimize the CMS Hadron Calorimetry by Assigning Weights to Layers"

  A. Beretvas et al., Fermilab-FN-619, CMS-TN/94-202, May 1994.
  First demonstration form CMS HCAL that a tail catcher with the appropriate weighting strategy can mitigate the effects of a limited HCAL depth.

• "The Effects of Miscalibration on the Energy Resolution of the CMS Calorimeter"

  A. Beretvas et al., Fermilab-FN-624, CMS-TN/94-263, August 1994.
  Effect on the energy resolution of random tile-to-tile and systematic front-to-back variations of response; strategy for correction using radioactive source calibration.

• "Di-jet Mass Resolution at High Luminosity in the CMS Calorimeter"

  A. Beretvas et al., Fermilab-FN-626, CMS-TN/95-057, October 1994.
  Effect of magnetic field, underlying event, cone size, minimum bias pileup, and cell threshold cuts on the dijet mass resolution for low pt Z -> jj, high pT Z -> jj, and high-mass Z' -> jj.

• "CMS Hadronic Calorimetry Simulation using Hanging File Data"

  I. Gaines et al., Fermilab-FN-631, CMS-TN/95-058, April 1995.
  Demonstrates use of weighting, tail catcher and "massless gap" layers to reduce low-energy tail arising from leakage.

• "Search for Heavy Higgs in the Channel H -> ZZ -> l l nu nu"

  I. Gaines et al., Fermilab-FN-632, CMS-TN/95-084, July 1995.
  Demonstrates performance for relatively large missing ET signal.

• "Search for Heavy Higgs in the Channel H -> WW -> l nu jet jet"

  I. Gaines et al., Fermilab-FN-634, CMS-TN/95-154, November 1995.
  Demonstrates performance for (high-pT) W reconstruction in the jet-jet channel.

  Plots from this note are available on the plots page.

• "Missing ET + jets Signals for Supersymmetry in the CMS Detector at the LHC"

  I. Gaines et al., Fermilab-FN-642, CMS-TN/96-058, June 1996.
  Missing ET performance including effects of cracks, degraded HCAL performance, and non-gaussian resolution.

  Plots from this note are available on the plots page.

• "In-Situ Calibration of the CMS HCAL Detector"

  J. Freeman and W. Wu, Fermilab-TM-1984, December 1996.
  Calibration using energy balance in Z+jet events and reconstruction of W -> jj in top decays.

• "Impact by Dead Channel of HAC1/HAC2 to the missing ET measurement"

  J. Freeman and W. Wu, USCMS-HCAL-97-001-SIM, April 1997.
  The effect of 0%, 5%, 10% dead channels on missing ET.

• "Dynamic Range of the CMS HB and HE Electronics"

  W. Wu and R. Vidal, Fermilab-FN-656, CMS Note 97-052, May 1997.
  Dynamic range estimation based on the maximum energy per cell in 20 years of LHC running.

• "On the Possibility to Observe h -> b b_bar with S/B ~ 1 in SUSY (mSUGRA)"

  S. Abdullin, CMS Note 97-070, 1997.

  Plots from this note are available on the plots page.