Song LIANG ihep.ac.cn CMS-IHEP, China

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Presentation transcript:

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

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

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

The energy respose of some events

Some bad shower

The discreteness of the every shower

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

The relation of the deposit energy of ECAL and HCAL

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

The distribution of the fitting parameters

Esum9x9 Energy of fitting

The shower shape From the real hit From the fitting

Real shower shape Fitting shower shape

The End! Backup Merry Christmas!

The distribution of the 9x9 crystals deposit energy

Cut: Esum9x9<1.2GeV

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