The STAR experiment

Module proposal : extension of "blog" module

 Module name : blog_addons

List of features:

1. Front page of a blog module.

Here’s a summary of results for null-test calculations of single-spin asymmetries for the Run 5 charged pion A_{LL} analysis plotted versus pT. Asymmetries are defined as (Y,B):

Yellow Beam: -1 x { (++ + +-) - (-+ + —) }
Blue Beam: -1 x { (++ + -+) - (+- + —) }
Like-Sign: (++) - (—)
Unlike-Sign: (+-) - (-+)

All the asymmetries incorporate final beam polarizations.

These plots were made from 5000 each of mu, pi-, and gamma single-particle events with eta distribution from -.2 to 1.2 and pt distribution from 5 to 40 GeV.  Tower clustering was done using a

Here’s a summary of results for null-test calculations of single-spin asymmetries for the Run 5 charged pion A_{LL} analysis. Asymmetries are defined as (Y,B):

Yellow Beam: -1 x { (++ + +-) - (-+ + —) }
Blue Beam: -1 x { (++ + -+) - (+- + —) }
Like-Sign: (++) - (—)
Unlike-Sign: (+-) - (-+)

All the asymmetries incorporate final beam polarizations.

I broke down and made an ntuple yesterday, which vastly speeds up the cut-testing process.  The following sequence of five histograms shows the tower energy spectrum (summed over the cluster)

These plots were made from 5000 events of each particle type.  For muons, tower clustering was done by setting a seed tower threshold of .25 GeV and a cluster threshold of .33 GeV: for gamma a