- My blog
- Post new blog entry
- Top bloggers
- Recent posts
Embedding tests: 9.2 GeV Au+Au in SL08d
Updated on Tue, 2008-08-26 15:41. Originally created by lbarnby on 2008-08-26 15:41.It was reported that the tuning of the scale factor (Normalization Factor in TRS) was giving different results in SL08c library at PDSF and RCF (see
constructing a webpage
Updated on Mon, 2008-08-25 12:37. Originally created by rcorliss on 2008-08-25 10:54.Bernd has asked that I put the details of my analysis into a static webpage (not a blog post like this one), but in order to get things in order in my head, this is where I'm starting.
MuKpi.C : micro-vertex code
Updated on Tue, 2008-11-11 20:43. Originally created by bouchet on 2008-08-22 15:38.Brief introduction to the code
group meeting update
Updated on Fri, 2008-08-22 07:47. Originally created by rcorliss on 2008-08-22 07:47.Using the yield formula I showed at the last meeting, I can now generate yields for the xs data that have better-contained error bars and are also far more accurate when the signal-to-backgro
Group Meeting Update
Progress towards a measurement of A_{LL} for charged pion production opposite a trigger jet using data from the 2006 STAR run. Goal is to present this measurement as a function of z
, defined here as p_{T}(pi) / p_{T}(trigger jet)
.
Update 2008-08-28: added data/MC comparison plots
Cuts Summary
Updated on Thu, 2008-09-04 14:45. Originally created by kocolosk on 2008-08-22 03:35.This page summarizes the effect of each major cut in the 2006 jet+charged pion analysis. Each plot is obtained by applying all other applicable analysis cuts except the one being illustrated.
Figure 1: Black is TPC z-vertex for all BJP1-triggered events, Green is the TPC z-vertex distribution for events in BBC timebins 6-9, and Red is the TPC z-vertex distributions for all charged pion tracks (inclusive, no trigger jet requirement).
It appears at first that the vz distribution of good tracks is broader than the BBC 6-9 distribution, but that’s not actually the case. Here’s the ratio of the red and green histograms from the above plot:
Figure 1b
The following histograms use positively charged pions from any spin state. Black lines are inclusive π+ passing all cuts except the one being shown, green lines are leading π+ opposite a trigger jet, and the filled green histogram shows the π+ accepted for the asymmetry analysis.
Figure 2: |η| < 1.0
Figure 3: |dcaG| < 1.0
Figure 4: nHitsFit > 25
Figure 5: nσ(π). It’s not possible to read off the efficiency from this histo because I actually use a time-dependent cut window based on the results of fill-by-fill fits to the nσ(π) distributions. Ideal world cut shown is nσ(π) [-1,2]
Here’s the ratio of the green and black histograms from that plot. The away-side spectrum has a relative lack of electrons but an increase in the p/K contamination:
Figure 5b
I should also add some more plots here documenting the cuts on jet pT, detector η, and N.E.F.
SSA vs. z
Updated on Fri, 2008-08-22 02:44. Originally created by kocolosk on 2008-08-22 02:41.Asymmetries are defined as (Y,B):
SSA vs. Fill
Updated on Fri, 2008-08-22 02:40. Originally created by kocolosk on 2008-08-22 02:37.Asymmetries are defined as (Y,B):
List of Jobs for run 9 as of 8/21/08
Updated on Thu, 2008-08-21 11:28. Originally created by sowinski on 2008-08-21 11:28.Attached is a list of jobs for run 9 with names of those volunteering to handle tasks.
Spin asymmetry statistical errors, part 2
Updated on Wed, 2008-08-20 18:32. Originally created by kurnadi on 2008-08-20 18:14.Updated the dE/dx cut. Previous asymmetry calculations was using +/- 3σ in dE/dx. The following has a tighter cut on the lower end, varies with momentum bins.