1. Scintillator (semi)DHCAL? Vishnu Zutshi for

2. 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)? SD detector used for these studies

3. Sampling Weights Determined from 10 GeV charged pions Minimize: (1/N)  (E 0 – a i L i ) 2 where E 0 is the incident energy a i is the weight for layer i L i 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 ~ 9cm 2 can be used to measure energy with reasonable degree of accuracy in a (semi)digital manner Only simple counting was used