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# P08id (phi ->KK)

Updated on Wed, 2009-02-11 14:52. Originally created by starembed on 2009-02-09 18:51.
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**QA P08id (Phi->KK)**

This is the QA for P08id (phi - > KK). econstructin on Global Tracks and just Kaons. Macro from Xianglei used (I found the QA macro very familiar). scale factor of 1.38 applied.

**1. dEdx**

Reconstruction on Kaon Daugthers. 2 different plots are shown just to see how Montecarlo looks on top of the Ghost Tracks

**2. DCA Distributions**

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();

**3. NFit Distributions**

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();

__4. Delta Vertex__

The following are the Delta Vertex ( Vertex Reconstructed - Vertex Embedded) plot for the 3 diiferent coordinates (x, y and z)

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

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

**7. Pt**

Embedded Phi meson with flat pt (black)and Recosntructed Kaons (red).

**8. Randomness Plots **

The following plots, are to check the randomness of the input Monte Carlo (MC) tracks.

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