sPHENIX discussion of software

["Huang, Jin" <jhuang AT bnl.gov>]

Also available on agenda: https://indico.bnl.gov/conferenceDisplay.py?confId=1919

 

 

General Update

 

Recent pull requests in core-software

·       Jin/Martin: Event headers for test beam analysis

·       Carlos: TPC code cleanup is on-going, and pull request is temporarily closed during development. To be reopened once done.   

• Jin: For faster debug, suggest use same random seed for the test to verify no output changes

·       John L.: update on Pythia6 generator triggers

 

Production

Following request from Clustering developers, Chris produced 1000 central HIJING events (0-4.4fm Au+Au) in full sPHENIX simulation.

·       Location /sphenix/sim/sim01/production/2016-07-12/ .

·       Example for embedding analysis to be posted via email.

 

 

Secondary vertex finding- Sanghoon Lim

 

Summary: successful test of multi-vertex finding in p+p events and observed quality secondary vertex reconstructed for events with hard b-quark production. Next will try second vertex finding in jets and use to tag b-jets

 

Slide3:

Sanghoon: vertex finder start with 2 tracks

  

Discussion:

Jin: Good to check signalized displacement cut on secondary vertex before going to vertex-mass analysis

 

Garbor: why signalized position resolution for the primary vertex is wider than that of the second vertex?

Jin: Guess two possible sources: 1) while primary vertex has higher tracks and smaller statistical error, finer error in systematics may start to show up. 2) single displaced track may be grouped into primary vertex.

Sanghoon: will check with more fundamental test, including use multiple high momentum particle thrown from one or two vertexes.

 

 

Analysis-oriented event display - Sook Hyun Lee

 

Summary: added calorimeter and jet to display from result of reconstruction.

 

Reference to ROOT/TEve tools: doi:10.1088/1742-6596/219/4/042055

 

Sookhyun: the event display is a fun4all module. Will upload to GitHub for more people to see the module.

 

Abhisek: where geometry come from?

Sookhyun: Geant4 GDML export based procedure developed by Abhisek

 

Megan/Jin: it is better to illustrate tower hit as trapezoidal block projecting to vertex. One utility to do this is TEveCalo3D

 

Slide 7:

Sookhyun: it is based on reconstructed event

 

Slide 8:

Sookhyun: Tracks are truth tracks

 

 

Geometry Management from Simulation to Analysis - Jin Huang

 

Summary: Introducing a DST-based geometry management from simulation stage to analysis. It provide full geometry that is consistent with simulation for use in the analysis stage.

 

Abhisek: Good to check Geant4 tracks not exported as part of the geometry.

Jin: The DST storage only containing geometry. However, the GDML temp file that used to import geometry from Geant4 could contain the extra track information.

Action Item [Jin]: check and update accordingly.

 

 

 

______________________________

 

Jin HUANG

 

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________

 

From: Huang, Jin
Sent: Monday, July 18, 2016 3:19 PM
To: 'sphenix-l AT lists.bnl.gov' <sphenix-l AT lists.bnl.gov>; 'sphenix-software-l AT lists.bnl.gov' <sphenix-software-l AT lists.bnl.gov>
Subject: [reminder] sPHENIX simulation and software meeting, Tue July 19th, 1PM EST @ 2-219.

 

Hello everyone,

 

This is a reminder that we will have a regular sPHENIX simulation and software meeting, Tue July 19th, 1PM EST @ 2-219.

 

Currently on agenda

·       Secondary vertex finding towards HF jet tagging

·       Reconstruction event display

·       Geometry management

More contributions are welcomed too

 

The agenda page is at https://indico.bnl.gov/conferenceDisplay.py?confId=1919 , for which the common modification password is "1008"

•            For residents at BNL, we will meet at the 2-219 conference room this time

•            To join the Meeting via phone bridge:  https://bluejeans.com/619960505 

•            To join via Phone:

1) Dial:

        +1.408.740.7256

        +1.888.240.2560(US Toll Free)

        +1.408.317.9253(Alternate number)

        (see all numbers - http://bluejeans.com/numbers)

2) Enter Conference ID: 619960505

 

Cheers,

 

Jin

 

 

______________________________

 

Jin HUANG

 

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

______________________________