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Exploring the Efficacy of Scintillator-based (Semi)Digital Calorimeters for High-Energy Physics

This study investigates the feasibility of using scintillator-based (semi)digital calorimeters in particle physics. With cell sizes of 6-12 cm², we assess how energy resolution can be controlled in these systems. Utilizing an SD detector and sampling weights derived from 10 GeV charged pions, we explore energy resolution and jet reconstruction through advanced techniques. Our findings indicate that cell sizes around 9 cm² can accurately measure energy in a (semi)digital manner, utilizing simple counting methods while considering jet energy resolution and particle smearing effects.

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Exploring the Efficacy of Scintillator-based (Semi)Digital Calorimeters for High-Energy Physics

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Presentation Transcript

  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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