Spin Physics PWG meeting
Updated on Mon, 2008-09-29 23:20. Originally created by sichterm on 2008-09-29 23:11.evo - http://evo.caltech.edu/evoGate/koala.jnlp?meeting=ete8eavtv9alaMItaiIt, at 21:00 (GMT), duration : 02:00
Evo: http://evo.caltech.edu/evoGate/koala.jnlp?meeting=ete8eavtv9alaMItaiIt
Phone: ID 540111, Password 7894, relevant bridge-lines
USA (BNL, Upton, NY) +1 631 344 6100
USA (Caltech, Pasadena, CA) +1 626 395 2112
| Time | Talk | Presenter |
|---|---|---|
| 00:00 | Di-jet Production Cross Section and Double Longitudinal Spin Asymmetry in sqrt(s) = 200 GeV pp at RHIC ( 00:20 ) 1 file | Tai Sakuma |
| 00:20 | Longitudinal double-spin asymmetries for inclusive charged pion production opposite a jet ( 00:20 ) 0 files | Adam Kocoloski |
| 00:40 | Update on FPDE Run 8 ( 00:20 ) 1 file | Jim Drachenberg |
spectra
Updated on Sat, 2008-09-27 12:50. Originally created by bedanga on 2008-09-27 12:29.Reference
Talk time : 15:15, Duration : 00:20
Monte Carlo Asymmetries
Updated on Sat, 2008-09-27 10:58. Originally created by kocolosk on 2008-09-27 09:46.Here are the asymmetries for STD, ZERO, GS-C, and MIN that I get out of PYTHIA with the minbias trigger condition applied:
Figure 1: raw minbias asymmetries
and here’s what I get after applying the pT reweighting:
Figure 2: minbias asymmetries after reweighting jet pT spectrum
Figure 3: jetpatch asymmetries
Figure 4: difference between Figures 3 and 1
Figure 5: difference between Figures 3 and 2
Finally, these four plots show the effect of the minbias pT reweighting on the bias systematic for each scenario:
Reweighting the MB pT spectrum
Updated on Sat, 2008-09-27 09:07. Originally created by kocolosk on 2008-09-27 08:38.
Subprocess Fractions
Updated on Sat, 2008-09-27 08:33. Originally created by kocolosk on 2008-09-27 08:31.
Study of ET Correction Factor Single Thrown Particle
Updated on Thu, 2008-10-02 17:24. Originally created by pagebs on 2008-09-26 18:05.ET Correction Factor Study using Single Particles
JP1 & JP2 Turn on efficiency
Updated on Fri, 2008-09-26 12:46. Originally created by mattheww on 2008-09-26 12:46.I used the 2006 MuDsts to generate the turn on curves for the JP1 and JP2 triggers. Both plots are integrated over all jet patches.
Concerning the 'floating' mass peak and Zgg
Objective:
Explore the pt-dependent mean mass position in data and MC and perhaps draw some conclusions about the quality of our simulations.
Details:
Hermes alignment system
Updated on Fri, 2008-09-26 09:42. Originally created by sowinski on 2008-09-26 09:42.Hermes ref
Congratulations to Paul Sorensen!
Updated on Thu, 2008-09-25 22:21. Originally created by chajecki on 2008-09-25 22:21.7 PR track plots with UPGR16 & fixed barrel
Updated on Thu, 2008-09-25 19:47. Originally created by balewski on 2008-09-25 19:27. Under:Geometry= UPGR16, 6 FGT disks , fixed barrel geometry.
Single electrons, 20 GeV ET, thrown at eta=0, 0.4, 0.8, 1.2, 1.6, 2.0
Fig 1, Z vertex=0
Elliptic flow fluctuation in collisions of deformed nuclei
Updated on Sat, 2008-09-27 13:58. Originally created by aihong on 2008-09-25 14:31.Reference
Speaker : Peter Filip ( Particle Physics Lab., Dubna )
Talk time : 12:00, Duration : 00:20
06 BNL 26Sep@008 Meeting
Updated on Wed, 2009-08-19 16:50 by balewski. Originally created by miro on 2008-09-25 11:08. Under:FEE Design
W Program talk for SPIN 2008
Updated on Sun, 2009-01-11 00:39. Originally created by sowinski on 2008-09-25 10:59.Draft for practice talk at analysis meeting
spin goals run 9 draft talk
Updated on Wed, 2008-09-24 21:59. Originally created by sowinski on 2008-09-24 21:59.Draft of run 9 goals attached
Special Attention Ought to be Paid to Zgg
The collaboration has concerns about the SMD, and not without reason. They, they SMDs, have been notoriously hard to understand and model.
Mean pT in z bins
I looked into the mean transverse momentum for pions and jets in each of my z bins. First, here’s a comparison of data (black points) and Monte Carlo (red lines) for the BJP1 trigger:
It looks good to me, so I went on to compare simulations for jet patch and minimum-bias triggers:
In hindsight, this plot makes perfect sense — the trigger hardens the pT spectrum for the jets, so each JP z bin (which integrates over 10-25 GeV) has a higher average jet p_{T} than the MB version.
Now, this 3 GeV p_{T} shift means that we’re biasing the sample in each z bin towards higher x. This is almost certainly the source of the observed trigger bias in the Monte Carlo asymmetries for π+. So, what’s the next step?