Flavor dependence of the Jet Energy Scale at ATLAS

par Dr Hongbo LIAO (CEA-Saclay)

vendredi 24 juil. 2009, 14:30 → 15:30 Europe/Paris

Salle 9111

We have looked at the energy scales for all jet flavors in ttbar, photon/Z0+jet and di-jet events. Pt(reco jet)/Pt(truth jet) doesn't seem very dependent on quark flavor and the ratio for gluon jets is much lower than for quark jets. But, Pt(reco jet)/Pt(parton) depend on flavor. For the same flavor, both of Pt(reco jet)/Pt(truth jet) and Pt(reco jet)/Pt(parton) don't depend on the process. Because of different flavor content, the average jet energy scale in different processes will be different. When trying to measure the b jet energy scale, contamination by light jets should be taken into account.