Difference between revisions of "Dilepton"

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= Introduction =
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= Mailing List =
  
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= program =
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ee@jlab.org
  
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[[SoLID_JPsi]]
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register at https://mailman.jlab.org/mailman/listinfo/ee
  
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[[TCS]]
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= Meeting =
  
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[[DDVCS]]
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'''Date''' Thursday 9:00AM ET
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'''Location''' F228
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'''Conference ID''' 7572696671
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'''Desktop sharing and video''' https://bluejeans.com/7572696671
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(You don't need to call in by phone if your PC has a mic and a speaker,
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but do REMEMBER to turn off mic and speaker to avoid echo if you use phoneline for audio)
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'''Audio''' Dial: 18882402560 (US or Canada only) ([http://bluejeans.com/numbers see all numbers]) and enter the Conference ID
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'''meeting system "bluejeans" howto''' https://hallaweb.jlab.org/wiki/index.php/Bluejeans_howto
  
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= emaillist =
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=== [[ meetings ]] ===
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ee@jlab.org
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<br>
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= Physics Topics =
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[[ TCS | Timelike Compton Scattering (TCS) ]]
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[[ Jpsi | Near-Threshold J/Ψ production ]]
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[[ penta | Charmonium pentaquark ]]
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[[ DDVCS |  Double DVCS ]]
  
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register at https://mailman.jlab.org/mailman/listinfo/ee
 
  
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= code =
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= Experiments and Letters of Intent =
  
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* generator by Marie Boer and Michel GUIDAL
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* E12-12-001 "Timelike Compton Scattering and J/ψ photoproduction on the proton in e+e- pair production with CLAS12 at 11 GeV"<br>
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** input file
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Proposal https://www.jlab.org/exp_prog/proposals/12/PR12-12-001.pdf was approved for 120 PAC days in CLAS12 by PAC 39.
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** root file https://ipnshare.in2p3.fr/owncloud/public.php?service=files&t=2224e3a32537708e35f2082e15a1be8f
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** note
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<pre>
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It is a root file with 2000000 events. You have 4-vectors that correspond to the outgoing particle energies and momenta,
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kinematical variables: Phi_CMV and Theta_CMV are the gamma* CM angles, Qp2 is Q'^2,
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Egamma is energy of the beam and tt is t. ttmin is t_min.
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You can select "VirtualFlag==0" correspond to event generated from a photon beam
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and "VirtualFlag==1" from quasi-real photon, with a cut maximal Q2=0.3 GeV2.
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To weight events you should use "W_tot_unpol". I am not sure yet of the polarized weights in some of the bins,
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* [[ SoLID_JPsi | E12-12-006 "Near Threshold Electroproduction of J/Ψ at 11 GeV" ]]<br>
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so please let me check it before using it.
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Proposal https://www.jlab.org/exp_prog/proposals/12/PR12-12-006.pdf was approved for 60 PAC days in SoLID by PAC 39.
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You can nevertheless also use "W_BH" and "W_TCS" that correspond to "BH only" or "TCS only" contribution to the unpolarized cross sections.
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Polarization vectors are probably not good in this version, please don't use it. The code is still in construction...  
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* E12-12-006A "TCS with circularly polarized beam and unpolarized LH2 target"
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</pre>
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Run group proposal https://www.jlab.org/exp_prog/proposals/15/PR12-12-006A.pdf approved by the SoLID collaboration.
  
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* genTCS
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* LOI12-15-007 "Timelike Compton Scattering on the transversely polarized proton at 11 GeV"
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** https://jlabsvn.jlab.org/svnroot/solid/evgen/genTCS
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LOI https://www.jlab.org/exp_prog/proposals/15/LOI12-15-007.pdf was submitted to PAC 43.
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** BH from quasi-real electron and real photon on proton, home made
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* grape-dilepton 
 
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** http://research.kek.jp/people/tabe/grape
 
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** BH from electron on proton, used by the experiments at DESY/HERA
 
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** see details how to run it and analysis result at https://jlabsvn.jlab.org/svnroot/solid/evgen/BH/readme
 
  
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* LPAIR
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= Software and Analysis tools =
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** used by the experiments at DESY/HERA
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* Compton2.0
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=== generators ===
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** BH from photoproduction, used by ZEUS
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* GiBUU
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List of [[ Dilepton_generator | Dilepton generators ]]
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** http://gibuu.hepforge.org
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(It may work on neutron also)
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GiBUU does a good job with real photons on a proton (or heavier)
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target.  It doesn't handle electroproduction as nicely (at least not the
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last time I asked the Giessen group).
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It is fairly straight forward to generate events, and there USED to be
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good examples of input jobcards on the website, but they have been removed
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recently while they upgrade.  I'd think the best route is to email them
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directly to get the code and also ask for the example jobcards.
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Latest revision as of 16:26, 2 March 2017

Mailing List

ee@jlab.org

register at https://mailman.jlab.org/mailman/listinfo/ee

Meeting

Date Thursday 9:00AM ET
Location F228
Conference ID 	7572696671
Desktop sharing and video https://bluejeans.com/7572696671
(You don't need to call in by phone if your PC has a mic and a speaker, 
but do REMEMBER to turn off mic and speaker to avoid echo if you use phoneline for audio)
Audio Dial: 18882402560 (US or Canada only) (see all numbers) and enter the Conference ID
meeting system "bluejeans" howto https://hallaweb.jlab.org/wiki/index.php/Bluejeans_howto

meetings


Physics Topics

Timelike Compton Scattering (TCS)

Near-Threshold J/Ψ production

Charmonium pentaquark

Double DVCS


Experiments and Letters of Intent

  • E12-12-001 "Timelike Compton Scattering and J/ψ photoproduction on the proton in e+e- pair production with CLAS12 at 11 GeV"

Proposal https://www.jlab.org/exp_prog/proposals/12/PR12-12-001.pdf was approved for 120 PAC days in CLAS12 by PAC 39.

Proposal https://www.jlab.org/exp_prog/proposals/12/PR12-12-006.pdf was approved for 60 PAC days in SoLID by PAC 39.

  • E12-12-006A "TCS with circularly polarized beam and unpolarized LH2 target"

Run group proposal https://www.jlab.org/exp_prog/proposals/15/PR12-12-006A.pdf approved by the SoLID collaboration.

  • LOI12-15-007 "Timelike Compton Scattering on the transversely polarized proton at 11 GeV"

LOI https://www.jlab.org/exp_prog/proposals/15/LOI12-15-007.pdf was submitted to PAC 43.


Software and Analysis tools

generators

List of Dilepton generators

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