NOTE:

• this page is continuously updated, new content will apper on the top
• as of May 3, 2011, embedding macro & kumac are awaiting check & approval by the embedding team which will be followed by a production of a test sample

Pythia kumac file:

• at rcf: ~kapitan/jets/embedding/Pythia_25-35_test/pyth_25-35.kumac
• this is Pythia CDF Tune A, set for pt hard 25-35 GeV

Primary Vertex setting for Pythia:

• in Z direction, the cut used in current analysis is +-30cm -> will be used in this embedding
• two triggers of interest minbias (vpd-zdce) and HT2 have nearly identical Z-distribution (Gaussian with mean ~2cm and sigma ~20cm)
• in X,Y plane minbias and HT2 are also quite similar, distributions have mean/RMS in X: 0.3cm/0.02cm, Y: -0.1cm/0.04cm - approximate with Gaussians
• starsim allows only X,Y sigma and Z sigma -> set to 0.03 and 20 (means are 0)

my latest embedding macro: /star/u/kapitan/jets/embedding/mb_zb_pions/zerobias/bfcMixer_FullPythia.C

list of zerobias files:

• PDSF: /u/kapitan/jet_embedding/transfer/final_random.list-brief
• 858 files, ~200GB, ~120k events

plots for zerobias files:

• events per file, zerobias and HT2 events per run (tpc+tpx+emc detectors, production_dAu2008 setup)
• the right hand side plot shows zerobias events nicely sample the whole HT2 trigger dataset

wiki links

(access through protecteed/STAR protected password):

• check of simulation/reconstruction geometries: rnc.lbl.gov/wiki/index.php/DAu_simu_geometries (this is still under discussion with STAR simulation team)
• comparison of real data & pion embedding test sample: rnc.lbl.gov/wiki/index.php/DAu_data_embedding_jets
• PV finder impact on track pt resolution and on jets: rnc.lbl.gov/wiki/index.php/Track_pt_reso_jets

PV + trigger impact on track efficiencies:

result: effect of minbias/zerobias and different PV settings (mimic of beamline): use zerobias with fixed PV, decrease tracking efficiency by 1% and assign additional 1% uncertainty

embedding request webpage: drupal.star.bnl.gov/STAR/starsimrequests/2010/sep/19/pythia-jets-dau-2008