2) Lambda Reconstruction

The reconstruction of Lambda and anti-Lambda hyperons.

Identification cut on track’s dE/dx measured in TPC is used to find pion and (anti-)proton.

Sketch for Topological Cuts

Values:

a) Statistics of Lambda and anti-Lambda Reconstruction, Inclusive
b) Statistics of Lambda and anti-Lambda Reconstruction, Jet near-side

Only the jet near-side Lambda used to extract D_TT.

The comparison about the reconstruction status with two sets of cut are shown here.
The loose one is the cut set used in run09 D_LL analysis and the tight one.

a) Statistics of Lambda and anti-Lambda Reconstruction, Inclusive

D_TT analysis Record, Rec_Step: all_cut_crp0995

Invariant Mass

Statistics Summary

====> Lambda

JP0

JP1

JP2

AJP

Combined

pt_T [GeV/c]
Central [GeV]
Width [GeV]
N_candidate
bkg fraction
Central [GeV]
Width [GeV]
N_candidate
bkg fraction
Central [GeV]
Width [GeV]
N_candidate
bkg fraction
Central [GeV]
Width [GeV]
N_candidate
bkg fraction
Central [GeV]
Width [GeV]
N_candidate
bkg fraction

1~2	1.1154	0.0016	364262	0.0536	1.1155	0.0016	1394859	0.0570	1.1155	0.0016	280707	0.0666	1.1155	0.0016	338322	0.0546	1.1155	0.0016	2378150	0.0572
2~3	1.1157	0.0021	96583	0.0609	1.1157	0.0021	496180	0.0654	1.1157	0.0022	122363	0.0758	1.1157	0.0021	118569	0.0631	1.1157	0.0021	833695	0.0660
3~4	1.1158	0.0027	25879	0.0612	1.1158	0.0028	186321	0.0649	1.1158	0.0028	57674	0.0748	1.1158	0.0027	38191	0.0609	1.1158	0.0028	308065	0.0659
4~5	1.1161	0.0035	6360	0.0616	1.1160	0.0034	65638	0.0644	1.1159	0.0034	25367	0.0703	1.1160	0.0035	11204	0.0565	1.1160	0.0034	108569	0.0648
5~6	1.1162	0.0041	1782	0.0791	1.1162	0.0042	25415	0.0720	1.1162	0.0042	11736	0.0745	1.1163	0.0042	3484	0.0669	1.1162	0.0042	42417	0.0726
6~8	1.1168	0.0051	729	0.0938	1.1166	0.0051	14932	0.0884	1.1166	0.0052	8622	0.0912	1.1169	0.0051	1853	0.0835	1.1166	0.0051	26136	0.0891

====> anti-Lambda

1~2	1.1155	0.0015	299136	0.0755	1.1155	0.0016	1048977	0.0834	1.1155	0.0015	195241	0.0999	1.1155	0.0015	284645	0.0735	1.1155	0.0017	1827999	0.0823
2~3	1.1157	0.0020	102267	0.0676	1.1157	0.0020	468030	0.0743	1.1157	0.0021	97877	0.0931	1.1157	0.0020	114900	0.0702	1.1157	0.0020	783074	0.0751
3~4	1.1159	0.0026	26961	0.0663	1.1159	0.0026	183094	0.0680	1.1158	0.0027	46292	0.0860	1.1159	0.0027	34646	0.0694	1.1159	0.0027	290993	0.0709
4~5	1.1162	0.0033	5659	0.0660	1.1161	0.0034	61114	0.0635	1.1160	0.0034	19641	0.0741	1.1161	0.0035	8582	0.0678	1.1161	0.0034	94996	0.0662
5~6	1.1166	0.0043	1301	0.0707	1.1163	0.0041	20461	0.0756	1.1162	0.0041	8679	0.0798	1.1164	0.0041	2292	0.0794	1.1163	0.0041	32733	0.0768
6~8	1.1168	0.0057	459	0.1046	1.1168	0.0053	10175	0.1061	1.1166	0.0051	5581	0.1092	1.1172	0.0053	972	0.1086	1.1168	0.0052	17187	0.1072