[Halld-offline] Geant3/Geant4 comparison MC

Wed Jul 18 00:10:40 EDT 2018

Hi all,
Please see some updates here:
https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_JeffersonLab_HDGeant4_issues_54&d=DwIFaQ&c=lz9TcOasaINaaC3U7FbMev2lsutwpI4--09aP8Lu18s&r=oyKV5joTkJsuRYv6hh48IMTw3i-IrYD-ZUAHHU0DdAY&m=acLul1Dx09Uml7wNbiMq_aaabjQ17dXT9YPTFMaH2mc&s=hU7cv072kzv_pk9U8y3RjsKxtLxOromFriK0o29lnkI&e= 

---Sean

On Tue, Jul 17, 2018 at 7:22 PM Justin Stevens <jrsteven at jlab.org> wrote:

> Hi Thomas,
>
> Thanks for putting these together.  First a technical point: there seems
> to be an issue with the p=1 GeV and theta=70 degrees single track samples,
> since the histograms are almost all empty.
>
> Now onto the other single track MC samples: The forward tracking momentum
> resolution is pretty poor from G4 (see pages 2 and 3 for both WireBased and
> TimeBased tracks in the single pi- at theta=4 and p=4 GeV
> https://halldweb.jlab.org/gluex_sim/G3G4_Comparisons/ver01/pim_4_4_Hist_Reconstruction.pdf).
> This is likely related to the # of reconstructed hits on tracks (page 17 of
> the same PDF) where very few of the tracks have the maximum number of hits
> expected for this region in G4.
>
> Interestingly the number of FDC wire and cathode hits, as well as pseudo
> points, for this sample are basically the same (see below where G3 is left
> and G4 is right).  Meaning the FDC hit-level objects are there, but there’s
> a problem with tracking through the FDC.  Any ideas from the experts on why
> this might be the case?
>
> A similar conclusion can be drawn from the single-particle samples at 15
> degrees.
>
> -Justin
>
> FDCWireHits
>
> [image: PastedGraphic-4.png]
>
> FDCCathodeHits
>
> [image: PastedGraphic-5.png]
>
> FDCPseudoHits
>
> [image: PastedGraphic-6.png]
>
> On Jul 17, 2018, at 2:04 PM, Thomas Britton <tbritton at jlab.org> wrote:
>
> Initial comparisons can be found
> https://halldweb.jlab.org/gluex_sim/G3G4_Comparisons/ver01/ and also at
> /volatile/halld/home/tbritton/REQUESTED_MC/
>
> *_Reconstruction are all the graphs from the
> /Independent/Hist_Reconstruction/ directory in hd_root.root and *_Neutrals
> come from /Independent/Hist_Neutrals/
>
> The prefixes should line up with the directories below.
>
> I haven't looked at all of the plots yet so if something looks wildly off
> please let me know and I can try to regenerate things by Thursday.
>
> Thomas
>
> ----- Original Message -----
> From: "Thomas Britton" <tbritton at jlab.org>
> To: "GlueX Offline Software Email List" <halld-offline at jlab.org>
> Sent: Monday, July 16, 2018 10:02:49 AM
> Subject: [Halld-offline] Geant3/Geant4 comparison MC
>
> initial runs of particle gun comparisons can be found:
>
> +----------------------------------------------------------------------------+
> | OutputLocation
>                                                             |
>
> +----------------------------------------------------------------------------+
> | /volatile/halld/home/tbritton/REQUESTED_MC/prot_g3_4_4_20180712023219pm/
>   |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/prot_g3_4_15_20180712023438pm/  |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/prot_g3_1_70_20180712023505pm/  |
> | /volatile/halld/home/tbritton/REQUESTED_MC/pim_g3_4_15_20180712023845pm/
>   |
> | /volatile/halld/home/tbritton/REQUESTED_MC/pim_g3_1_70_20180712023858pm/
>   |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/gamma_g3_4_4_20180712023935pm/  |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/gamma_g3_4_15_20180712024002pm/ |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/gamma_g3_1_70_20180712024104pm/ |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/gamma_g4_1_70_20180712024133pm/ |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/gamma_g4_4_15_20180712024211pm/ |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/gamma_g4_4_4_20180712024219pm/  |
> | /volatile/halld/home/tbritton/REQUESTED_MC/pim_g4_1_70_20180712024321pm/
>   |
> | /volatile/halld/home/tbritton/REQUESTED_MC/pim_g4_4_15_20180712024344pm/
>   |
> | /volatile/halld/home/tbritton/REQUESTED_MC/pim_g4_4_4_20180712024352pm/
>    |
> | /volatile/halld/home/tbritton/REQUESTED_MC/prot_g4_4_4_20180712024455pm/
>   |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/prot_g4_4_15_20180712024515pm/  |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/prot_g4_1_70_20180712024531pm/  |
>
> +----------------------------------------------------------------------------+
>
> where prot_g3_4_15_20180712023438pm is formed from [particle
> user]_g[3/4]_[P GeV]_[Theta degrees]_[Time Stamp]
> thus the example above is for 4 GeV protons shot through geant3 at 15
> degrees.
>
> The signal MC can be found:
>
>
> +---------------------------------------------------------------------------+
> | OutputLocation
>                                                            |
>
> +---------------------------------------------------------------------------+
> | /volatile/halld/home/tbritton/REQUESTED_MC/RHO_geant3_20180713024643pm/
>   |
> | /volatile/halld/home/tbritton/REQUESTED_MC/RHO_geant4_20180713024658pm/
>   |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/OMEGA_geant4_20180713024842pm/ |
> |
> /volatile/halld/home/tbritton/REQUESTED_MC/OMEGA_geant3_20180713024852pm/ |
> | /volatile/halld/home/tbritton/REQUESTED_MC/PHI_geant3_20180713024922pm/
>   |
> | /volatile/halld/home/tbritton/REQUESTED_MC/PHI_geant4_20180713024930pm/
>   |
> | /volatile/halld/home/tbritton/REQUESTED_MC/PI0_geant3_20180713025004pm/
>   |
>
> +---------------------------------------------------------------------------+
>
> These use the same 4 vectors and are of the form
> [Channel]_geant[3/4]_[Time Stamp].
>                                                  RHO->pi+ pi-
>                                                  OMEGA->pi+ pi- pi0
>                                                  PHI->K+ K-
>                                                  PI0->gg
>
> +-------------------------------------------------------------------------+
> | OutputLocation                                                          |
> +-------------------------------------------------------------------------+
> | /volatile/halld/home/tbritton/REQUESTED_MC/PI0_geant3_20180713025004pm/ |
> +-------------------------------------------------------------------------+
>
> contains two straggler jobs which are currently running....
>
> NOTE:  In All cases the smearing is actually smearing and the software is
> "the latest and greatest": version_2.37_jlab.xml
>
> I will begin to process them using Sean's comparison scripts but they
> should exist for others to start to look at them before the Geant4 meeting
> on Friday.
>
> Thomas
>
>
>
>
>
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