sPHENIX MAPS tracker discussion

[Xin Dong <xdong AT lbl.gov>]

Hi Sanghoon,

Could you please post the two figures in a non-phenix directory? I seems to have permission issue with them.

What vertexing algorithm in the reconstruction for recalculating the DCA? Do you have the event vertex resolution vs. event multiplicity?

Thanks and Regards

/xin

On Thu, Aug 23, 2018 at 3:28 PM, Sanghoon Lim <shlim AT rcf.rhic.bnl.gov> wrote:

Hi Ming,

Requiring at least 2 associated MVTX hits already provide a huge rejection of fake tracks (tracks from pileup events). Therefore the DCA shapes are looks quite similar, as you can see in the full DCA distribution of low pT tracks (black-w/o pileup, red-w/ pileup). One thing to point is that there's still a long tail in simulation w/o pileup.

https://www.phenix.bnl.gov/WWW/p/draft/shlim/plots/20180823/sPHENIX_sim_pileup_pp_dca_xy_2bins.gif

https://www.phenix.bnl.gov/WWW/p/draft/shlim/plots/20180823/sPHENIX_sim_pileup_pp_dca_z_2bins.gif

Things may change with using realistic seed vertex instead of using true vertex, and this study will be followed when the module is ready.

Best,

Sanghoon  

On Aug 23, 2018, at 3:23 PM, mxliu <ming AT bnl.gov> wrote:

Hi Sanghoon,

 

Very nice work!  Is it possible to evaluate fake track rate for large DCA ghost tracks? 

 

Cheers,

Ming 

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Ming Xiong Liu

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From: sPHENIX-MAPS-l <sphenix-maps-l-bounces AT lists.bnl.gov> on behalf of Sanghoon Lim <shlim AT rcf.rhic.bnl.gov>
Date: Thursday, August 23, 2018 at 2:18 PM
To: Christof Roland <christof.roland AT cern.ch>
Cc: Molly Taylor <mitay AT umich.edu>, Carlos Perez <carlos.perezlara AT stonybrook.edu>, <sanghoon.lim AT colorado.edu>, Mickey Chiu <chiu AT bnl.gov>, "sphenix-intt-l AT lists.bnl.gov" <sphenix-intt-l AT lists.bnl.gov>, "Chiu, Mickey" <chiu AT rcf.rhic.bnl.gov>, sPHENIX-MVTX <sphenix-maps-l AT lists.bnl.gov>, "Todoroki, Takahito" <todoroki AT rcf.rhic.bnl.gov>
Subject: Re: [Sphenix-maps-l] Next Meeting of the Inner Tracker Task Force

 

Hi all,

 

I produced a new set of files based on comments from the task force meeting, and you can check with the link below (added in the indico).

 

https://indico.bnl.gov/event/4885/contributions/23040/attachments/19709/26006/sPHENIX_IDTF_shlim_20180823.pptx

 

I can probably have a quick look on the performance of 2 layers of INTT with the hit files I have right now for the next week.

 

Best,

Sanghoon

On Aug 21, 2018, at 8:49 AM, Christof Roland <christof.roland AT cern.ch> wrote:

 

Hi Everybody, 

we will have the next meeting of the inner tracker task force, tomorrow, Wednesday, at 9am EST.
The indico link can be found here:
https://indico.bnl.gov/event/4885/

The google doc can be found here:
https://docs.google.com/document/d/17PJdu94Ydg25V-cTHIYfSbkfojH4ZUEfsfoZPm0RDb0/edit

Please update the doc by Wednesday to reflect our current status. 

Cheers

  Christof 

 

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===========================
Xin Dong
Staff Scientist, Nuclear Science Division
Lawrence Berkeley National Lab
MS70R0319, One Cyclotron Road
Berkeley, CA 94720, USA
Tel: +1-510-486-4121
Email: XDong AT lbl.gov
===========================