Relative Uncertainty for Lc reconstruction (LHC13c and LHC13b anchor runs) in Simulation.

Motivation

The motivation of this study is to check whether the current production LHC13d3 has enough statistics for the efficiency studies. The relative uncertainty of Lc MC and reconstructed ones will be shown. Some assumptions of enhancement by different factors will also be evaluated.

Runs

Lego trains 81 and 82. Two runs were used:

LHC13b anchor runs: 7 M events

195483, 195482, 195481, 195480, 195479, 195478, 195391, 195390, 195389

LHC13c anchor runs: 23.8 Mevents

195677, 195675, 195673, 195644, 195635, 195633, 195596, 195593, 195592, 195568, 195567, 195566, 195531, 195529

Ratio 13c/13b = 3.4

Cut object

The cut object used was alien:///alice/cern.ch/user/m/mfiguere/CutspPb2013/cuts_Comb_kAny_pPbBest.root. Best cuts as in November 29th.

The cuts are:

Pt Bin (GeV/c)	Cosinus Pointing Angle	DecayLength(cm)	DCA (cm)	Sigma Vertex	Dist. to Prim.(cm)	Proton pt (GeV/c)	Kaon pt (GeV/c)	Pion pt (GeV/c)
2-3	0.4	0.006	0.05	0.05	0	0.4	0.4	0.4
3-4	0.6	0.006	0.028	0.06	0.022	0.5	0.7	0.5
4-5	0.92	0.006	0.04	0.04	0.005	0.7	0.5	0.4
5-6	0.	0.01	0.04	0.05	0.01	0.5	0.4	0.5
6-8	0.	0.006	0.04	0.04	0.01	0.7	0.7	0.7
8-10	0.	0.006	0.04	0.05	0.012	0.9	0.9	0.9

1 --- Lc --> Delta + K

This decay channels was chosen because provides the least yield after reconstruction among all (see section 2 for a comparison).

Figure 1.1 - Yield from LHC13d3 MC	Figure 1.1 - Yield from LHC13d3 Reco

Figure 1.2 - Yield from LHC13d3 x 10	Figure 1.2 - Yield from LHC13d3 x 10

Figure 1.3 - Yield from LHC13d3 x 100

Figure 1.4 - Yield from LHC13d3 x 200	Figure 1.4 - Yield from LHC13d3 x 200

Figure 1.5 - Yield from LHC13d3 x 1000	Figure 1.5 - Yield from LHC13d3 x 1000

2 --- Different decay channels

Figure 2.1 - Lc --> Delta

Figure 2.2 - Lc --> Delta

Figure 2.3 -

Figure 2.4 -

Figure 2.5 -

Figure 2.6 -

Figure 2.7 -

Figure 2.8 -