Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 89: Detektorsysteme III

T 89.3: Talk

Thursday, March 22, 2018, 17:00–17:15, Z6 - SR 2.007

Pileup effect removal in shower shape of photon ID — •Binish Batool, Ivor Fleck, and Yichen Li — University of Siegen, Siegen, Germany

In this presentation the shower shapes of photons in the calorimeter of the ATLAS detector are investigated. The presence of in-time pile up causes some deviation in the distribution of the shower shapes of photons. This deviation is studied by using an efficient estimator i.e. average energy density in eta regions; |η| < 1.5 (central energy density) and 1.5 < |η| < 3.0 (forward energy density). The choice of this estimator depends on its correlation with shower shapes. The correction of shower shapes employs a subtraction method at derivation level, to remove the pile up effect. For this, an eta dependent energy density and area of corresponding cells are used, which results in a removal of the pile-up effect.