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A (more) realistic HCAL Energy Reconstruction for SICBDST v232

Upgrade proposal for HCAL energy reconstruction, including modifications, calibration methods, and future prospects by José Ocariz at CERN.

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A (more) realistic HCAL Energy Reconstruction for SICBDST v232

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  1. A (more) realistic HCAL Energy Reconstruction for SICBDST v232 José OCARIZ, CERN

  2. Overview • Current HCAL status • Proposed modifications • motivation • input • calibration • For the future... José OCARIZ, CERN

  3. Current Status • HCEL bank  all energy deposited in one cell, including plastic AND iron • No simulation of light yield attenuation • outdated Z segmentation • Uses GEANT+GEISHA hadronic interface José OCARIZ, CERN

  4. Proposal for SICBDST V232 (I) • Use test-beam studies: • Plastic and fiber light yield (Dorokhov, Britvitch) • Standalone simulation (Ocariz) • Together, they provide a good simulation of (prototype) HCAL performances! • … but they are plugged-in at the GEANT (GUSTEP) level… • ...some minimal info on energy deposition might suffice for a reasonable description of attenuation… to be studied José OCARIZ, CERN

  5. Proposal for SICBDST V232 (II) • What can be done at the SICBDST level? • Count energy deposited in plastic • Recalibrate using  tracks • Modify HCEL bank: • HCEL$E  energy in plastic (calibrated) • HCEL$E1  energy in plastic (non calibrated) • HCEL$E2  total energy • HCEL$E3, HCEL$E4  spare José OCARIZ, CERN

  6. About calibration(I) • Total energy deposited in HCAL is about 70% of initial particle (for GEANT+GEISHA) • Energy in active medium is much smaller • Need to calibrate! • Use  clusters with completely readout 3x3 box around maximum • cut on ECAL activity • independent calibration for INNER and OUTER sections (to take into account a possible effect of different cluster size) José OCARIZ, CERN

  7. Outer HCAL: ~ 1.9 % Inner HCAL: ~ 1.8 % About calibration(II) José OCARIZ, CERN

  8. … looking ahead... • SICBDST V232: a more realistic HCAL energy reconstruction • committed • not definitive: Light yield attenuation simulation yet to be plugged-in • define a (minimal) set of extra variables (e.g. energy deposition barycenter in cell, some Z segmentation info) José OCARIZ, CERN

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