Tracking

• (left) Tracking efficiency and fake rate in |eta| < 1 extracted from a sample of central (b=2 fm) HIJING events produced with quenching effects turned off and above 10 GeV, from negative pions embeded in central HIJING events. The ATLAS track reconstruction algorithm xKalman was used to reconstruct the tracks. (right, top). Tracking efficiency as a function of pseudo-rapidity for tracks with 3 < pT < 8 GeV extracted from the same central sample of HIJING events. (right, bottom) Fake rate as function of pseudo-rapidity for the same tracks as in the top panel.

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• Transverse momentum resolution around mid-rapidity (|eta| < 1).

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• Reconstruction of the invariant yield of charged particles in |eta| < 0.5 for a sample of central HIJING events with quenching effects turned off (b=2 fm with dNch/dh = 2650). Red circles show the extracted yield and the histogram corresponds to the generated input distribution.

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• (left) Distribution of vertex x coordinate residual reconstructed with SingleAdaptive method using tracks produced with xKalman tracking algorithm from a sample of minimum biased HIJING events produced with quenching effect turned off. (middle) Distribution of z coordinate residuals for the same reconstructed vertices as in the left figure. (right) The resolution of the vertex finding algorithm as a function of the number of tracks used to construct the vertex averaged over events with different centrality from HIJING minimum bias sample.

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Responsible: AdamTrzupek
Last reviewed by: Never reviewed