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Cross Talk in the BSMD

With the StEmcSimulatorMaker recently cleaned up and streamlined (thanks again, Adam), it wasn't a difficult task to simulate the effect of cross talk between the fibers in the BSMD readout.  Nom

Single-particle plots made using the new pixel fast simulator

Attached are pdf files giving efficiencies for all three inner silicon detectors vs.

AuAu@19.6GeV: Fit Study

The goal of this study is to understand the discrepancy in fit results from analyses w/ and w/o electron cut.  Here I will mostly focus on the first kT bin (0.15-0.25 GeV/c) since  the l

AuAu@19.6GeV:Dependence of fitted HBT radii on fit range

Dependence of fitted HBT radii on fit range for two analyses (w/ and w/o electron cut)

  • the most central AuAu@19.6 GeV collisions (bin1)

AuAu@19.6GeV:Dependence of fitted HBT radii on Coulomb radius

Dependence of fitted hbt radii on Coulomb radius :
Figure shows results for the most central AuAu@19.6GeV for fit range Q: [0,0.16] GeV/c

AuAu@19.6GeV: SH moments - why some bins are not shown on plots?

Some bins are not shown on the plot like for example 1st and 4th bin in A10 on left figure below because they are above the scale.

AuAu@19.6GeV: Data selection

1. Event selection

 

Can we get asymmetry in Re{A11} from GenBod?

The goal of this study: 

Asymmetry in Re{A11}

Single-particle results

These plots were generated from 30 files of 2000 events each, for a total of 60000 kaons.  There are 128788 Pixel hits, 181764 Ist hits, and 43606 Ssd hits:

Updated Charged Pion A_{LL} predictions

Received some new NLO pQCD predictions from Werner incorporating DSS fragmentation functions.  Here's a comparison of these predictions to the old mocked up ones used in the SPIN 2006 preliminary result:




No really dramatic changes here.  The increased asymmetries might mean that g-g scattering is even more important than predicted originally.  Of course, this goes in the wrong direction if we're looking for better agreement with our Pythia.