sPHENIX EMCal discussion

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

Hi Martin

Thank you for the comment!

The current production only produce and save the Geant4 information. 
Towering, clustering and this position-dependent energy scale correction are 
fast and are run by analyzers. Therefore, the cluster energy, corrected or 
not are not going to the production DSTs anyway. 

I was borrowing the term re-calibrator for the position-dependent energy 
scale correction. I think it is a tool analyzer should individually choose to 
use or not. For example, the Upsilon electron ID and photon-jet analysis 
probably want to use it, as it sharpens the electron/photon response. The 
EMCal+HCal cluster jet probably should NOT use it, as hadron shower in EMCal 
will have different position response. We probably want to see how this can 
be applied to central Au+Au simulations, where background is high. And the 
module should save the position-corrected cluster to an additional EM cluster 
DST node, so analyzers could easily pick alternative ones and compare. Shall 
we?

Cheers,

Jin



______________________________

Jin HUANG

Associate Physicist
Brookhaven National Laboratory
Physics Department, Bldg 510 C
Upton, NY 11973-5000

Office: 631-344-5898
Cell:   757-604-9946
______________________________


> -----Original Message-----
> From: sPHENIX-EMCal-l [mailto:sphenix-emcal-l-bounces AT lists.bnl.gov] On
> Behalf Of Martin Purschke
> Sent: Wednesday, May 31, 2017 10:42 AM
> To: sphenix-emcal-l AT lists.bnl.gov
> Subject: Re: [Sphenix-emcal-l] Simulated Resolution of EMCal
> 
> Jin,
> 
> not disputing the recalibrator, but wouldn't such a has-to-be-applied
> correction not go on the DSTs already, rather than armies of people
> individually applying the correction after the fact? Just wondering...
> the recalibrators were once designed to take care of things we discovered
> after the fact, when a big production was done and a re-production just to
> incorporate that was too expensive. It's not a lot of data, so we could 
> just do
> that.
> 
> My 5cts,
> 
>     Martin
> 
> 
> On 05/31/17 09:53, Huang, Jin wrote:
> >
> > Great Job! Joe!
> >
> >
> >
> > It is also interesting that the energy resolution spread from
> > different pseudo-rapidity bins become consistent after the recalibration.
> >
> >
> >
> > Now it would be useful to introduce a module applying cluster energy
> > recalibration for all analyzers of EM showers. It can be in the
> > nightly build with the name of *coresoftware*
> > <https://github.com/sPHENIX-Collaboration/coresoftware>/simulation
> > <https://github.com/sPHENIX-
> Collaboration/coresoftware/tree/master/sim
> > ulation>/g4simulation
> > <https://github.com/sPHENIX-
> Collaboration/coresoftware/tree/master/simulation/g4simulation>/*g4cemc
> */RawClusterRecalibrator.
> > The calibration constant data file can be installed at  *calibrations*
> > <https://github.com/sPHENIX-Collaboration/calibrations>/*CEMC**/**Cali
> > bration**via pull requests too. An example of doing recalibration via
> > calibration data files is from the last two test beams,
> > **CaloCalibration*
> >
> <https://www.phenix.bnl.gov/WWW/sPHENIX/doxygen/html/da/d36/classC
> aloCalibration.html>*.
> > Welcome to give a try.*
> >
> >
> >
> > Cheers,
> >
> >
> >
> > Jin
> >
> >
> >
> >
> >
> >
> >
> > ______________________________
> >
> >
> >
> > Jin HUANG
> >
> >
> >
> > Associate Physicist
> >
> > Brookhaven National Laboratory
> >
> > Physics Department, Bldg 510 C
> >
> > Upton, NY 11973-5000
> >
> >
> >
> > Office: 631-344-5898
> >
> > Cell:   757-604-9946
> >
> > ______________________________
> >
> >
> >
> > *From:*sPHENIX-EMCal-l [mailto:sphenix-emcal-l-bounces AT lists.bnl.gov]
> > *On Behalf Of *Joe Osborn
> > *Sent:* Wednesday, May 31, 2017 9:12 AM
> > *To:* Haggerty, John <haggerty AT bnl.gov>
> > *Cc:* sphenix-emcal-l AT lists.bnl.gov
> > *Subject:* Re: [Sphenix-emcal-l] Simulated Resolution of EMCal
> >
> >
> >
> > Dear EMCalers,
> >
> >
> >
> > Following Jin's suggestion, I implemented a leading order position
> > dependent recalibration on the energy response for photons, electrons,
> > and positrons. The results are attached in this email.
> >
> >
> >
> > Please note that the "before recalibration" plots are not the exact
> > same as what I sent before as I was inadvertently only using 10% of
> > the simulation that Chris produced (whoops). The results here are
> > using the entire single particle production. The position dependent
> > recalibration reduces the constant term by 1-2% for each eta bin.
> >
> >
> >
> > Thanks,
> >
> >
> >
> > Joe Osborn
> >
> >
> >
> >
> >
> >
> > ---------------------------------------
> >
> >
> >
> > Joe Osborn
> >
> > Ph.D Candidate
> >
> > University of Michigan
> >
> > jdosbo AT umich.edu <mailto:jdosbo AT umich.edu>
> >
> > (859) 433-8738
> >
> >
> >
> > On Sun, May 28, 2017 at 10:13 AM, Joe Osborn <jdosbo AT umich.edu
> > <mailto:jdosbo AT umich.edu>> wrote:
> >
> >     Hi John,
> >
> >
> >
> >     Chris sent a couple of emails out to the software lists, but I
> >     guess not the other lists. It might be too late as the BBQ might
> >     already be fired up, but for anyone who wants to take a look the
> >     G4 hits files are located in the following directory:
> >
> >
> >
> >     /sphenix/data/data02/review_2017-08-02/
> >
> >
> >
> >     Joe
> >
> >
> >
> >
> >
> >
> >     ---------------------------------------
> >
> >
> >
> >     Joe Osborn
> >
> >     Ph.D Candidate
> >
> >     University of Michigan
> >
> >     jdosbo AT umich.edu <mailto:jdosbo AT umich.edu>
> >
> >     (859) 433-8738 <tel:%28859%29%20433-8738>
> >
> >
> >
> >     On Fri, May 26, 2017 at 4:04 PM, John Haggerty <haggerty AT bnl.gov
> >     <mailto:haggerty AT bnl.gov>> wrote:
> >
> >         Joe,
> >
> >         Thanks to Joe, Jin, and Chris for these results.  There is
> >         obviously some bouncy behavior that seems a little odd, but I
> >         know that even in very simple cases, getting "the resolution"
> >         at the few percent level is not as simple as it sounds.
> >
> >         Just to be clear--this is with the right detector material
> >         budget in front of the EMCAL, all events from (0,0,0), and
> >         Sean's light collection map in every tower?
> >
> >         Probably as you say nobody's going to have time between the
> >         barbecue this weekend and the upcoming barbecues at the lab,
> >         but you might ask Chris to post their location to the wiki and
> >         the emcal and hcal lists.
> >
> >         On 5/26/17 3:37 PM, Joe Osborn wrote:
> >
> >             Dear EMCalers,
> >
> >             As Jin presented in the simulations/EMCal meeting this
> >             week, he has updated the EMCal simulations with the tower
> >             tilting in azimuth and polar directions, amongst other
> >             changes. With the simulations code tagged, Chris produced
> >             single particle simulations that people can play with
> >             before we start producing large batches of simulations.
> >
> >             Attached are the resolution of the EMCal for photons,
> >             electrons, and positrons in several different eta bins.
> >             Just to be clear, the single particles were thrown for 9
> >             different energies in the four different eta regions
> >             surrounding the values quoted in my plots (i.e. eta=0
> >             corresponds to truth particles being thrown in +/-0.05
> >             units of pseudorapidity around 0, same for eta=0.3,0.6,
> >             and 0.9).
> >
> >             Any comments would be great, or perhaps everyone will be
> >             too busy enjoying the long weekend in which case we can
> >             also discuss them at the EMCal meeting next week.
> >
> >             Thanks,
> >
> >             Joe
> >
> >             ---------------------------------------
> >
> >             Joe Osborn
> >             Ph.D Candidate
> >             University of Michigan
> >             jdosbo AT umich.edu <mailto:jdosbo AT umich.edu>
> >             <mailto:jdosbo AT umich.edu <mailto:jdosbo AT umich.edu>>
> >             (859) 433-8738 <tel:%28859%29%20433-8738>
> >
> >
> >             _______________________________________________
> >             sPHENIX-EMCal-l mailing list
> >             sPHENIX-EMCal-l AT lists.bnl.gov
> >             <mailto:sPHENIX-EMCal-l AT lists.bnl.gov>
> >             https://lists.bnl.gov/mailman/listinfo/sphenix-emcal-l
> >
> >
> >
> >         --
> >         John Haggerty
> >         email: haggerty AT bnl.gov <mailto:haggerty AT bnl.gov>
> >         cell: 631 741 3358 <tel:631%20741%203358>
> >         _______________________________________________
> >         sPHENIX-EMCal-l mailing list
> >         sPHENIX-EMCal-l AT lists.bnl.gov
> >         <mailto:sPHENIX-EMCal-l AT lists.bnl.gov>
> >         https://lists.bnl.gov/mailman/listinfo/sphenix-emcal-l
> >
> >
> >
> >
> >
> >
> >
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