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Scintillator (semi)DHCAL?

Scintillator (semi)DHCAL?. Vishnu Zutshi for. Introduction. Can a scintillator (semi)digital calorimeter work? Cell sizes are necessarily 6-12 cm 2 Can one control energy resolution for these sizes (no strong evidence that pattern recognition will fail for these sizes)?

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Scintillator (semi)DHCAL?

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  1. Scintillator (semi)DHCAL? Vishnu Zutshi for

  2. Introduction • Can a scintillator (semi)digital calorimeter work? • Cell sizes are necessarily 6-12 cm2 • Can one control energy resolution for these sizes (no strong evidence that pattern recognition will fail for these sizes)? • SD detector used for these studies

  3. Sampling Weights • Determined from 10 GeV charged pions • Minimize: (1/N) S (E0 – aiLi)2where E0 is the incident energy ai is the weight for layer i Li is the energy/number of hits in lyr i • For simplicity i=2 considered here

  4. Energy Resolution single threshold

  5. ZZ Events

  6. Simple Jet Reconstruction • Pt order stable mc particles (neutrinos are ignored) • Start with highest pt particle and cluster particles within a 0.7 cone • Repeat procedure with remaining particles

  7. Jet Composition

  8. Energy Smearing • Fit the sigma’s as a function of the incident energy • Throw a random gaussian • Smear the neutral hadron E accordingly • Photons are smeared with a 17% term • Generated E used for charged hadrons

  9. Sanity Check

  10. Impact of Neutral Hadrons

  11. Jet Energy Resolution Fitted widths

  12. Jet Energy Resolution rms

  13. Jet E/Egen (digital)

  14. Jet E/Egen (analog)

  15. Single Particle Resolutions Non-projective geometry single threshold

  16. Single Particle Resolutions Non-projective geometry dual threshold

  17. Projective vs Non-projective

  18. Jet Energy Resolutions

  19. Summary • Monte Carlo single particle resolutions convoluted in jet resolutions indicate that cells of size ~ 9cm2 can be used to measure energy with reasonable degree of accuracy in a (semi)digital manner • Only simple counting was used

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