**QA ALambda->P, pi (03 08 2009)**

**1. Dedx**

Reconstruction on Proton and Pion Daugthers. 2 different plots are shown just for the sake of completenees....

Reco Proton | Reco Pion |

**2.Dca**

An original 3D histogram had been created and filled with pT, Eta and DCA as the 3 coordinates. Projection on PtBins and EtaBins had been made to create this "matrix" of plots.

Pt Bin array used : { 0.5, 0.6, 0.8, 1.0} (moves down) and

Eta Bin array : {0.2, 0.5, 0.8, 1.0} (moves to the right)

For the Error bars, i used the option hist->Sumw2();

***.Reconstructing on Proton **

__ *. Reconstructing on Pion__

**3. Nfit**

Similarly An Original 3D Histogram had been created with Pt, Eta and Nfit as coordinates. Respective projections had been made in the same pT and Eta Bins as the DCa distributions.

Pt Bin array used : { 0.5, 0.6, 0.8, 1.0} (moves down) and

Eta Bin array : {0.2, 0.5, 0.8, 1.0} (moves to the right)

For the Error bars, i used the option hist->Sumw2();

***. Reconstructing Proton**

***. Reconstructing Pion**

**4. Delta Vertex **

When reconstructed in Proton and pions it turns out to have the same ditreibutions so I just posted one of them

**5. Z Vertex and X vs Y vertex**

**6. Global Variables : Phi and Rapidity**

Reco Proton | Reco Pion |

**7. pt**

**8. Randomness**