About N em cut: 20 GeV neutron N(em)=0 N(em)<2 N(em)<5 N(em)<10 N(em)<20 Mean: σ: 46.5 Mean: σ: 34.5 Mean: σ: 31.1 Mean: σ: 28.8 Mean: σ: 27.9 We get better knowledge of energy resolution, when allowing some small number of hits in ECAL

SiD vs. stand alone G4 simulation GeV Mean σ σ/M (σ/M) x√E GeV Mean σ σ/M (σ/M) x√E Stand alone G4 (34 layers) GeV Mean σ σ/M (σ/M) x√E GeV Mean σ σ/M (σ/M) x√E KL0KL0KL0KL0 neutron SiD Projection geometry 7.4mm – 12mm cell size Fixed cell size 10mm 7.0mm fixed cell size: 10 GeV pi- N hits (σ) = 93.9 (17.4) 10.mm fixed cell size: 10 GeV pi- N hits (σ) = 86.6 (16.5)

Number of hit vs. average cell size Cell size = 7.4mm x ( r (mm)/ 1410.mm), average over one event Average 7.4 – 8.2 mmAverage 8.8 – 9.2 mm Average 9.8 – 10.2 mmAverage 10.8 – 12. mm Mean: 34.6 σ: %/√E Mean: 31.5 σ: %/√E

Number of hit vs. average cell size Average 8.8 – 10.2 mm All Mean: 33.9 σ: %/√E Mean: 32.3 σ: %/√E

Neutron – KL response K_L N N N Number of hits Number of hits Number of hits Total E (GeV) K.E. (GeV) P (GeV) Neutron and K_L gives different response