Changes between Initial Version and Version 1 of SusyJets

Timestamp:

Mar 20, 2012, 4:18:47 PM (13 years ago)

Author:

trac

Comment:

--

SusyJets

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+
+
+== Jet Radiation in SUSY events ==
+
+
+
+=== People ===
+   1. Johan Alwall
+   1. Simon de Visscher
+   1. Fabio Maltoni
+
+=== Aim of the project ===
+We study QCD radiation in SUSY events, such as gluino-gluino, stop-stop, stop-gluino processes.
+We use the MLM matching and verify/improve the results of 
+[http://arxiv.org/abs/hep-ph/0510144 Tilman, David and Peter], and in particular we investigate
+whether the extra hard jets in SUSY events are well described by the parton-shower, as it is usually claimed,
+or if matching gives a better description. We also study the matching in heavy tops events as a reference and 
+the SM background needed in these kind of analysis. The SM samples will be used also for other applications.
+
+=== Tools ===
+   * Madgraph/MadEvent v4 : SUSY and matching
+   * [http://cp3wks05.fynu.ucl.ac.be/twiki/bin/view/Software/MadMatchChecker MadMatchChecker]
+
+=== Work ===
+We have identified two phases: 
+   1. MC samples generation and validation
+   2. Physics results and paper writeup
+ 
+==== MC samples generation and validation ====
+The strategy here is to first generate samples at the after-showering level to perform the validation.
+Once all samples are validated, we'll do the full Pythia-PGS simulation. 
+
+===== Generation =====
+====== Standard Model Samples (Simon) ======
+To get a faster generation we:
+   *  define a new model (smzerobmass), where the bmass is set to "Zero" in the particles.dat. This optimizes the  flavor sum
+   * We don't decay the Z, W+,W-, and tops. We'll let these particles be decayed by Pythia. In doing this we loose spin correlations, which, however are irrelevant for the multi-jet samples for this type of studies.
+   * Not to generate the single particle samples for Z and W. These have a negligible impact on the multi-jet
+ configurations we are interested in.
+   * In Pythia, we consider only decays of W into leptons (e, mu and tau) and also into neutrinos for Z.
+
+====== SUSY and SM Samples ======
+  
+||'''Process'''||'''Webpage'''||'''section(s)'''||'''LHE (on disks)'''||'''Pythia'''||'''MC'''||'''PGS'''||
+||1. '''gogo at 607 GeV (sps1a)'''|| n/a|| all ||ok || ok||ok || ||
+||1a. '''SC 1'''||n/a||4||ok||ok|||| n/a ||
+||1b. '''SC 2'''||n/a||4||ok|||||| n/a ||
+||1c. '''SC 3'''||n/a||4||ok|||||| n/a ||
+||1d. '''SC 4'''||n/a||4||ok|||||| n/a ||
+||1e. '''QCUT x 2'''||n/a||3.1||ok|||||| n/a ||
+||2. '''gogo at 607 GeV with xqcut and QCUT / 2'''|| [http://madgraph.phys.ucl.ac.be/MadGraphData/simon.devisscher@uclouvain.be/PROC40/HTML/crossx.html here] || 3.1 || || || || n/a ||
+||3. '''gogo at 607 GeV with scales divided by 2'''||[http://madgraph.phys.ucl.ac.be/MadGraphData/simon.devisscher@uclouvain.be/PROC40/HTML/crossx.html here] ||3 ||ok || || || n/a ||
+||4. '''gogo at 607 GeV with scales multiplied by 2'''|| [http://madgraph.phys.ucl.ac.be/MadGraphData/simon.devisscher@uclouvain.be/PROC40/HTML/crossx.html here]||3 || ok|| || || n/a ||
+||5. '''gogo at 300 GeV'''|| ||4 ||ok || ok|| ok|| n/a ||
+||6. '''gogo at 1200 GeV'''|| ||4 || ok||ok || ok|| n/a ||
+||7. '''sqsq at sps1a'''||n/a || 4,5|| ok|| || || ||
+||8. '''sqgo at sps1a'''|| n/a|| 4,5||ok|| || || ||
+||9. '''ulul at 607 GeV'''||[http://madgraph.hep.uiuc.edu/MadGraphData/devisscher@fynu.ucl.ac.be/PROC30/HTML/crossx.html here] ||3,4 ||ok ||ok || || n/a ||
+||10. '''ulul at 607 GeV with scales divided by 2'''|| [http://madgraph.hep.uiuc.edu/MadGraphData/johan@alwall.net/PROC60/HTML/crossx.html here]||3 ||ok ||ok ||ok || n/a ||
+||11. '''ulul at 607 GeV with scales multiplied by 2'''|| [http://madgraph.hep.uiuc.edu/MadGraphData/johan@alwall.net/PROC60/HTML/crossx.html here] ||3 ||ok ||ok || ok|| n/a ||
+||12. '''ululbar at 607 GeV'''|| [http://madgraph.hep.uiuc.edu/MadGraphData/devisscher@fynu.ucl.ac.be/PROC31/HTML/crossx.html here] ||3,4 ||ok ||ok ||ok || n/a ||
+||13. '''ululbar at 607 GeV with scales divided by 2'''||[http://madgraph.hep.uiuc.edu/MadGraphData/devisscher@fynu.ucl.ac.be/PROC37/HTML/crossx.html here] ||3 ||ok ||ok ||ok || n/a ||
+||14. '''ululbar at 607 GeV with scales multiplied by 2'''||[http://madgraph.hep.uiuc.edu/MadGraphData/devisscher@fynu.ucl.ac.be/PROC37/HTML/crossx.html here] ||3 || ok|| ok|| ok|| n/a ||
+||15. '''ttbar'''|| n/a|| 3,5|| ok||ok || ok|| ||
+||15a. '''QCUT x 2'''|| n/a|| 3,5|| ok|| || || n/a ||
+||16. '''ttbar with xqcut and QCUT / 2'''|| n/a|| 3.1 || || || || n/a ||
+||17. '''ttbar with scales divided by 2'''|| [http://madgraph.phys.ucl.ac.be/MadGraphData/johan@alwall.net/PROC169/HTML/crossx.html here]||3 ||ok||ok || ok|| n/a ||
+||18. '''ttbar with scales multiplied by 2'''||[http://madgraph.phys.ucl.ac.be/MadGraphData/johan@alwall.net/PROC169/HTML/crossx.html here] ||3 ||ok ||ok ||ok || n/a ||
+||19. '''W+4 jets biaised'''|| n/a||5 ||ok || || || ||
+||20. '''W+3 jets biaised'''|| [http://madgraph.phys.ucl.ac.be/MadGraphData/simon.devisscher@uclouvain.be/PROC37/HTML/crossx.html here]|| 5||ok|| || || ||
+||21. '''Z+4 jets biaised'''|| n/a||5 ||ok|| || || ||
+
+
+==== Physics results and paper writeup ====
+
+===== Plots for the paper =====
+
+Explanation of notation: 
+   * 4x2 runs means 4 unmatched, 4 matched runs with the different shower params
+   * 4 params means with the 4 different shower params
+   * decay jet #s means number of jets from decays
+   * jet numbers means plot of number of jets above (say) 50 GeV in the events
+
+||'''Figure'''||'''section'''||'''Process(es)'''||'''Description'''||'''Done (plan)'''||'''plot'''||
+|| 1 || 2 || n/a || Feynman diagrams illustrating resonance double counting (3 plots) ||done||||
+|| 2 || 3.1 || 1,1e,2,15,15a,16 || Standard validation plots: diff. jet rates 0,1,2 with QCUT, x2, /2 for pT- and Q2-ordered showers, for gogo and ttbar (4x3x3 plots)|| ? ||||
+|| 3a || 3.2 || 15 (4x2 runs),16,17 || pT of 1st and 2nd extra jet in ttbar, unmatched and matched dep on shower params, scale dep. for matched (4 plots) || 6-7/08 ||[attachment:Pt_ttbar.eps Pt_ttbar.eps]||
+|| 3b || 3.2 || 1 (4x2 runs),3,4 || pT of 1st and 2nd extra jet in gogo, unmatched and matched dep on shower params, scale dep. for matched (4 plots) || 8/08? ||[attachment:Pt_gogo.eps Pt_gogo.eps]||
+|| 4(7) || 3.3 || 1,9,12 || HTred and pTs, matched for gogo, ulul and ulul* 600 GeV (3 plots) || 11/08 ||[attachment:Htred.eps Htred.eps]||
+|| 5(6) || 3.3 || 1,5,6 || pT of 1st-2nd extra jet and HTred, matched for gogo at 300, 600, 1200 GeV (2x3 plots) || 11/08 ||[attachment:pt_300_600_1200.eps pt_300_600_1200.eps]||
+|| 6a(8) || 4 || 1a (4x2 runs) || HT(n),n=3,4,5(?) matched for gogo with decay jet #s, ETmiss unmatched and matched for sc. 1 (4 plots) || 6-7/08 ||[attachment:htcontrib-mockup.eps htcontrib-mockup.eps]||
+|| 6b(9) || 4 || 1b (4x2 runs) || HT(n),n=3,4,5(?) matched for gogo with decay jet #s, ETmiss unmatched and matched for sc. 2 (4 plots) || ||[attachment:htcontrib-sc2.eps htcontrib-sc2.eps]||
+|| 7(10) || 4.1 || 1a (4 unm runs),12 || HT(n),n=2,3,4 and jet numbers for unmatched gogo sc. 1 (4 params) and matched ululbar sc. 3 (2x4 plots) || 12/08 ||||
+|| 8(11) || 4.2 || 1d (4x2 runs) || ETmiss unmatched and matched (1 plot) || 12/08 ||||
+
+For sec. 5 we should plot the most important quantities used in typical experimental analyses, such as ETmiss, HT(4), and what else? All after PGS.
+
+
+
+-- Main.JohanAlwall - 05 Aug 2008
+
+   * [attachment:Pt_ulul.eps Pt_ulul.eps]: Pt of 1rst and 2nd jet for ulul
+
+   * [attachment:Pt_ululbar.eps Pt_ululbar.eps]: Pt of 1rst and 2nd jet for ululbar
+
+   * [attachment:Htred.eps Htred.eps]: Ht red for gogo, ulul and ululbar, as well as Pt of 1rst and second, all with and without matching
+
+   * [attachment:htcontrib-mockup.eps htcontrib-mockup.eps]: contrib of jets to Ht scenario 1
+
+   * [attachment:Pt_ttbar.eps Pt_ttbar.eps]: pt for ttbar
+
+
+   * [attachment:pt_300_600_1200.eps pt_300_600_1200.eps]: characteristic of jets for in gogo for go mass=300, 600 and 1200 GeV
+
+   * [attachment:Pt_gogo.eps Pt_gogo.eps]: pt of the 1rst and 2nd jet for gogo (with ME and PS)
+
+   * [attachment:Pt_ulul.eps Pt_ulul.eps]: Pt of two leading jets for ulul
+
+   * [attachment:Pt_ululbar.eps Pt_ululbar.eps]: pt of leading jets for ululbar
+
+   * [attachment:Htred.eps Htred.eps]: Htred and Pt for gogo, ulul and ululbar, Pythia vs ME
+
+   * [attachment:Pt_ttbar.eps Pt_ttbar.eps]: Pt_ttbar.eps
+
+   * [attachment:Pt_ulul.eps Pt_ulul.eps]: Pt_ulul.eps
+
+   * [attachment:Pt_ululbar.eps Pt_ululbar.eps]: Pt_ululbar.eps
+
+   * [attachment:Pt_ulul.eps Pt_ulul.eps]: Pt_ulul.eps
+
+   * [attachment:pt_300_600_1200.eps pt_300_600_1200.eps]: pt_300_600_1200.eps
+
+   * [attachment:htcontrib-sc2.eps htcontrib-sc2.eps]: preliminary plot showing the contribution of decay jets to Ht and MET for scenario2
+
+   * [attachment:Htred.eps Htred.eps]: Htred.eps
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