goal : study the contamination due to mis-identification of daughter in D0->K^{-}pi^{+}

• use 50k D0 generated with starsim : powerlaw pt in [0,5], flat in -1<y<1, flat in 0< phi < 2pi
• reconstruction done in SL08f, y2007g geometry (SSD+SVT)
• MuDst file analyse with user analysis code

crossfeed appears when the kaon^{-} is identified as a pion^{-}, and the pion^{+} as a kaon^{+}

Then for the decayD0->K^{-}pi^{+}, the decay K^{+}pi^{-} = D0bar is reconstructed in lieu of a D0

first look : here

in this link : inv mass for all pairs, true D0, fakes as a function of PtD0, cosine(theta*)

second look : here

in this link , same as before  but with graph instead of tables for summary + inv mass mean and width vs Pt for true and fakes

third look ; breakdown of cuts : here

in this link, study of how many D0 pairs are rejected at each steps/cuts of the analysis code