The STAR experiment

The dAu production is done. 

http://www.star.bnl.gov/HyperNews-star/protected/get/starsoft/9768.html

Sooraj did some initial QA, 

(email here: http://www.star.bnl.gov/HyperNews-star/protected/get/heavy/5169/1.html)

QA- Results here (file is attached also below):  https://drupal.star.bnl.gov/STAR/system/files/dAu16_QA.pdf

[Xin's initial thoughts]
A few distributions I don't quite understand. (DCA_XY looks not so good, HFT ratio is a bit low). 

Since there are discussions of reproducing the dataset at Cori soon (MTD issue).
We need to make sure the HFT is absolutely good in the production.
...
I think the DCA_XY resolution might be due to the vertex finder options.
I am producing some test samples to verify this.

For the HFT ratio, the suspect would be the pileup. There is already a TOFMatch requirement in the denominator, but not sure since the pileup is very huge, the random match probability is not small.
To study this, we can look at this ratio vs. luminosity. Or maybe using further tighter cuts, requiring both TOF and BTOW matches (random match in both TOF and BTOW would be much smaller...), but we probably don't have statistics for low pT due to the BTOW efficiency.

----- misalignment with AGML

Jason has a presentation today at the S&C meeting.
Specify question I discussed with him SSD ladder 2 tables

see https://drupal.star.bnl.gov/STAR/blog/jwebb/issue-sst-misalignment-tables



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