1. Song LIANG Email: liangs @ ihep.ac.cn CMS-IHEP, China 2009.12.25
Hadron Shower Shape
Song LIANG
ihep.ac.cn
CMS-IHEP, China

2. Data Sample 1). Data sample: pi- Eta = 0.65779 Phi = 0.21976
E : 20~120.0 GeV
Events:40000

3. The distribution of number of crystals
which have energy response.
The distribution of the energy of every hit

4. The energy respose of some events

5. Some bad shower

6. The discreteness of the every shower

7. eta and phi of the crystal which the hadron hit the
ECAL, calculated from track extrapoloation.

8. The relation of the deposit energy of ECAL and HCAL

9. Fitting the shower shape
Single Pi-
Stable hit point
Formula:
2D fitting
Fitting parameters: CX,CY, R1,Etot

10. The distribution of the fitting parameters

11. Esum9x9
Energy of fitting

12. The shower shape
From the real hit
From the fitting

13. Real shower shape
Fitting shower shape

14. The End!
Backup
Merry Christmas!

15. The distribution of the 9x9 crystals deposit energy

16. Cut: Esum9x9<1.2GeV