Calo Prediction Trial Nagoya University F - LAB Kunihiro Morishima

X Y Method not real scale emulsion target + SFT EMcal νbeam U V SFT hit information cluster position information 1. predict the CS scanning area (5mm×5mm) by using Fiber hit information 2. predict the angle by connecting line between CS scanning position and cluster position in EMcal Make prediction by using highest energy cluster position at EMcal highest energy cluster Position information from Bruce prediction track 7m

Position Prediction line by hand U projection 5mm 3026_23438 CS scanning area 5mm×5mm

Position Prediction V projection 5mm 3026_23438

Angle Prediction U EMcal V EMcal X EMcal Y EMcal 1.cluster position coordinate transformation from (X,Y) to (U,V) 2. calculate angle U EMcal – U SFT L V EMcal – V SFT L θ u ＝ θ v ＝ L = distance between CS and Emcal position resolution CS ±2.5mm EMcal ±75mm (2.5+75) /7000 ～ 11mrad

Effect of magnet emulsion target + SFT EMcal magnet Pt ～ 225 MeV GeV 22.5 GeV 4.5 mrad 7m δθ

Scanning Position ± 2.5mm Angle ± 15mrad CS scan prediction allowance Bulk scan Net Scan Back Location SS scan

Result Event IDE cluster (GeV) located or not comment 3118_ ○ electron shower 3113_ ○ electron shower 3026_ ○ electron shower 3113_ ×SS broken 3008_ ×bad alignment ( high density ～ 2×10^5/cm^2) Tried 5 event, located 3 event If data quality is good, this method is effective

3118_26855

3113_07743

3026_23438