Following are QA plots for the pico files processed.

Note : there is already some cuts applied to make the pico files 

• probability > .1
• |Eta_D0|<1.85
• silicon hits >2 for both daughters
• theta*(kaon)<.6
• |y_D0|<.5
• |ndEdx_pion|<2, |ndEdx_kaon|<2
• |dcaXY|<.1 for both daughters

In the pdf :

• page 1 : event quantities : ZVertex, gRefMult, # primary tracks, # of (Kpi) pairs
• page 2 : pT,P , dEdx vs P, ndEdx for daughters
• page 3: #silicon hits, dcaXY and dcaZ for daughters
• page 4 : mass (Kpi) pair, signed decay length, error of signed decay length, cosine(kaon) in D0 frame
• page 5 : dcaXY,dcaZ between daughters at secondary vertex
• page 6 : pT,P,phi ,eta, and y of (Kpi) pairs

note : for plots on pages 4,5,6 (Kpi) pairs with opposite signs are selected

The list of files processed is here