The STAR experiment

Few slides I wanna show at Spectra Meeting.

 There was some concern about the effectiveness of the proposed cuts at different cluster energies, so here are plots showing exactly that.

For this study, I generated 1000 pions +/- per event with  :

For both data and simulation, I calculated the distribution of cos(theta*), 1/2(eta3 + eta4), and invariant mass. The simulation jets were appropriately weighted.

 We put the silicon hits information for analysis code.

cuts used :

nHitsFit >20

|eta|<1.0

dcaGlobal <1.5

nFit/nPoss >0.52 

 I've finished generating 500k piminus events, 50k pizeros, and 50k single photons (all sitting in magic_single_particle with the earlier samples), and have put them through the same cuts

The momentum resolution from the TPC NIM Paper is 2% + 1.5% * pt.

timeline 1.1

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 A Timeline

Intro :

The quality of SSD hits is calculated as the ratio of the sum of strips fired by the GEANT hit over the charge of the reconstructed cluster.

added by zibi