sPHENIX tracking discussion

["Frawley, Anthony" <afrawley AT fsu.edu>]

Hi Sourav,

Here are a few comments on your poster:

Abstract:

-------------

"  ... and hadronic calorimeters which has full azimuthal coverage and
spans 2 units of central pseudo-rapidity."
->

"  ... and hadronic calorimeters which have full azimuthal coverage and

span 2 units of central pseudo-rapidity."

"1.5 T" -> "1.4 T"  (right? that is what we are using now in simulations).

Charged particle tracking detectors:
------------------------------------------------
The TPC outer radius that we settled on was 78 cm, not 75 cm.

"TPC/MAPS matching helping in Jet
physics, upsilon measurement"
->

"Helps TPC/MAPS matching in Jet
physics, upsilon measurement"

Tracking performance studies:
----------------------------------------

I don't think it is a good idea to show a set of plots with different outer radii for the TPC. We have decided on our outer radius of 78 cm (the maximum we can fit in), and I think it will confuse people to show other values. Similarly for the MAPS + 60 TPC layers without the INTT, it will be confusing.

Regarding plots with silicon ladders + TPC:

1) The DCA plot you show is for MAPS ladders + INTT ladders + TPC. The plot is for a 60 layer TPC but it will not make any difference at all to the DCA performance if we change to 40 layers, so I would not bother to make the distinction.

2) I can give you a plot of pT resolution made with MAPS ladders + INTT ladders + TPC. I see no reason that you should not show it. It leads to Upsilon mass resolution that slightly exceeds our spec, but if a member of the audience figures that out in their head we should recruit them immediately. I will send it to you separately, see what you think.

3) I will also send you a plot of single track efficiency for pions made with MAPS ladders + INTT ladders + TPC.

sPHENIX simulations output:

---------------------------------------

The J/psi mass spectrum must be for single J/psi's, since there is no background above the J/psi mass? Why is it plotted on a log plot? What is the message? What is the physics related to this?

Cheers

Tony

---

From: sphenix-tracking-l-bounces AT lists.bnl.gov <sphenix-tracking-l-bounces AT lists.bnl.gov> on behalf of Sourav Tarafdar <sourav.pheonix AT gmail.com>
Sent: Monday, January 30, 2017 12:37 PM
To: sphenix-tracking
Subject: [Sphenix-tracking-l] QM17 poster draft for sPHENIX tracking

 

Dear all,

Please find the draft of my QM17 poster for sPHENIX tracking here :

https://www.phenix.bnl.gov/WWW/p/draft/isibf5y/TarafdarS_QM17poster_v1.pdf

I am still looking for tracking performance plots for MAPS(ladder)+INTT(ladder)+TPC for pure pions. I have left a place holder for those plots with a comment unless tracking group decides otherwise. Comments and suggestions are welcome.

Best regards,

-Sourav