(r6) ProspectsforSUSYandUED < AtlasPublic

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---+Introduction
This note presents an evaluation of the discovery potential of Supersymmetry and Universal Extra Dimensions for channels with jets, leptons and missing transverse energy. The LHC running scenario at a centre-of-mass energy of 10 TeV, delivering an integrated luminosity of $200 {pb}^{-1}$ for the 2009-2010 run is investigated. 
The ATL-PHYS-PUB-2009-084 note can be found [[http://cdsweb.cern.ch/record/1191916/files/ATL-PHYS-PUB-2009-084.pdf][here]]

*Figure 1*

<div align="center">
<a href="%ATTACHURL%/MSSM_prejudice_tanbeta.gif">
    <img src="%ATTACHURLPATH%/MSSM_prejudice_tanbeta.gif" alt="MSSM_prejudice_tanbeta.gif" width='400'></img></a>
</div>

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<a href="%ATTACHURL%/MSSM_prejudice_hgluino_minimal_squark_without_t.gif">
    <img src="%ATTACHURLPATH%/MSSM_prejudice_hgluino_minimal_squark_without_t.gif" alt="MSSM_prejudice_hgluino_minimal_squark_without_t.gif" width='400'></img></a>
</div>

 <div align="center">
<a href="%ATTACHURL%/MSSM_prejudice_neutralino1.gif">
   <img src="%ATTACHURLPATH%/MSSM_prejudice_neutralino1.gif" alt="MSSM_prejudice_neutralino1.gif" width='400'></img></a>
</div>

<div align="center">
<a href="%ATTACHURL%/MSSM_prejudice_M_stop.gif">
   <img src="%ATTACHURLPATH%/MSSM_prejudice_M_stop.gif" alt="MSSM_prejudice_M_stop.gif" width='400'></img></a>
</div>

<div align="center">
<a href="%ATTACHURL%/MSSM_prejudice_hsmalestsusy_next.gif">
   <img src="%ATTACHURLPATH%/MSSM_prejudice_hsmalestsusy_next.gif" alt="MSSM_prejudice_hsmalestsusy_next.gif:" width='400'></img></a>
</div>

  
 
 Figure 1: Parameters of the pMSSM with constraints grid. Shown are (from top to bottom) the distribution of $\tan \beta$, the mass of the gluino versus the mass of the light squarks, the mass of the $\chi_{0}^{1}$ and the mass of the $\tilde{t}_{1}$. The lowest plot shows the distribution of the various types of nLSP for the same pMSSM models.

*Figure 2*

<div align="center">
<a href="%ATTACHURL%/number_of_events_after_all_cuts.gif">
  <img src="%ATTACHURLPATH%/number_of_events_after_all_cuts.gif" alt="number_of_events_after_all_cuts.gif" width='400'></img></a>
  
</div>


Figure2: Number of events expected for 200 $\rm{pb}^{-1}$ in 0-lepton channels and multi-leptons channels after preselection for the main background processes and the SUSY signal SU4.



*Figure 3*
<div align="center">
<a href="%ATTACHURL%/hMeff2jet0lepton_withST_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff2jet0lepton_withST_medium_crack_V2.gif" alt="hMeff2jet0lepton_withST_medium_crack_V2.gif" width='400'></img></a>
</div>

<div align="center">
<a href="%ATTACHURL%/hMeff3jet0lepton_withST_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff3jet0lepton_withST_medium_crack_V2.gif" alt="hMeff3jet0lepton_withST_medium_crack_V2.gif" width='400'></img></a>
</div>

<div align="center">
<a href="%ATTACHURL%/hMeff4jet0lepton_withST_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff4jet0lepton_withST_medium_crack_V2.gif" alt="hMeff4jet0lepton_withST_medium_crack_V2.gif" width='400'></img></a>
</div>


Figure3: Effective mass distributions for the 2 jet (upper plot), 3 jet (middle plot) and 4 jet channel (lower plot) with 0 leptons.

*Figure 4*
<div align="center">
<a href="%ATTACHURL%/EtMiss_4jet0lep_V2.gif">
  <img src="%ATTACHURLPATH%/EtMiss_4jet0lep_V2.gif" alt="EtMiss_4jet0lep_V2.gif" width='400'></img></a>
</div>
Figure 4: Missing transverse energy distributions for the 4 jet channel with 0 leptons.

*Figure 5*

<div align="center">
<a href="%ATTACHURL%/hMeff2jet1lepton_withST_MTbigger100_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff2jet1lepton_withST_MTbigger100_medium_crack_V2.gif" alt="hMeff2jet1lepton_withST_MTbigger100_medium_crack_V2.gif" width='400'></img></a>
</div>

<div align="center">
<a href="%ATTACHURL%/hMeff3jet1lepton_withST_MTbigger100_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff3jet1lepton_withST_MTbigger100_medium_crack_V2.gif" alt="hMeff3jet1lepton_withST_MTbigger100_medium_crack_V2.gif" width='400'></img></a>
</div>


<div align="center">
<a href="%ATTACHURL%/hMeff4jet1lepton_withST_MTbigger100_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff4jet1lepton_withST_MTbigger100_medium_crack_V2.gif" alt="hMeff4jet1lepton_withST_MTbigger100_medium_crack_V2.gif" width='400'></img></a>
</div>


Figure5: Effective mass distributions for the 2 jet (upper plot), 3 jet (middle plot) and 4 jet channel (lower plot) with 1 lepton.


*Figure 6*

<div align="center">
<a href="%ATTACHURL%/hMeff2jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff2jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif" alt="hMeff2jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif" width='400'></img></a>
</div>

<div align="center">
<a href="%ATTACHURL%/hMeff3jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff3jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif" alt="hMeff3jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif" width='400'></img></a>
</div>

<div align="center">
<a href="%ATTACHURL%/hMeff4jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif">
  <img src="%ATTACHURLPATH%/hMeff4jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif" alt="hMeff4jet2leptonOS_withST_withDeltaphi_medium_crack_V2.gif" width='400'></img></a>
</div>



Figure6: Effective mass distributions for the 2 jet (upper plot), 3 jet (middle plot) and 4 jet channel (lower plot) with 2 leptons with opposite sign (OS) charge.


*Figure 7*


<div align="center">
<a href="%ATTACHURL%/MT_4jet1lep_V2.gif">
  <img src="%ATTACHURLPATH%/MT_4jet1lep_V2.gif" alt="MT_4jet1lep_V2.gif" width='400'></img></a>
</div>

Figure 7: $M_T$ distributions for the 4 jet channel with 1 lepton.



*Figure 8*

<div align="center">
<a href="%ATTACHURL%/MSUGRA10_contourLines_summary.gif">
  <img src="%ATTACHURLPATH%/MSUGRA10_contourLines_summary.gif" alt="MSUGRA10_contourLines_summary.gif" width='400'></img></a>
</div>


Figure 8:  $5\sigma$ discovery reach as a function of $m_{0}$ and $m_{1/2}$ for $\tan \beta =10$ mSUGRA scan for channels with 0, 1 and 2 leptons.  Only the channels with the largest discovery reach are shown for each lepton multiplicity. 

*Figure 9*

<div align="center">
<a href="%ATTACHURL%/MSUGRA50_contourLines_summary.gif">
  <img src="%ATTACHURLPATH%/MSUGRA50_contourLines_summary.gif" alt="MSUGRA50_contourLines_summary.gif" width='400'></img></a>
</div>

Figure 9: 5\sigma$ discovery reach as a function of $m_{0}$ and $m_{1/2}$ for $\tan \beta =50$ mSUGRA scan for channels with 0 and 1 leptons.


*Figure 10*

<div align="center">
<a href="%ATTACHURL%/cross_section_vs_min_susy_discovery_mssm_with_stop_sbottom.gif">
  <img src="%ATTACHURLPATH%/cross_section_vs_min_susy_discovery_mssm_with_stop_sbottom.gif" alt="cross_section_vs_min_susy_discovery_mssm_with_stop_sbottom.gif" width='400'></img></a>
</div>


<div align="center">
<a href="%ATTACHURL%/MSSMPREJUDICE_medium_all.gif">
  <img src="%ATTACHURLPATH%/MSSMPREJUDICE_medium_all.gif" alt="MSSMPREJUDICE_medium_all.gif" width='400'></img></a>
</div>

Figure 10: The points of the pMSSM grids with constraints as a function of the total cross section and the minimal SUSY mass (upper plot) and as a function of the minimal mass of the light squarks and the mass of the gluino (lower plot).

*Figure 11*

<div align="center">
<a href="%ATTACHURL%/Significance_UED_NjetYlep_Meff_V2.gif">
  <img src="%ATTACHURLPATH%/Significance_UED_NjetYlep_Meff_V2.gif" alt="Significance_UED_NjetYlep_Meff_V2.gif" width='400'></img></a>
</div>


Figure 11: Significance $\sigma$ as a function of $1/R$ for the Universal Extra Dimensions scenario, taking into account channels with 0, 1 and 2 leptons.


*Table1*


 | *Process*| *Generator*| *Simulation* | *$N_{\rm points}$*| *$N_{\rm events}$ per point*|
|mSUGRA | $\tan \beta =10$ | HERWIG 6.5 ATLFAST2 | 76 | 30000 |
|mSUGRA |$\tan \beta =50$ | HERWIG 6.5 & ATLFAST2 | 23 | 30000 |
|pMSSM constraints | PYTHIA 6.4 | ATLFAST1 | 150 | 30000 |
|UED | PYTHIA 6.4 | ATLFAST2 | 8 | 5000-100000|

Table1: The Monte Carlo generator, detector simulation programme, the number of points in parameter space per model, and the number of events per point for all signal samples.


*Table2*
 |*Process*|*Generator*|*$N_{events}$*|*$\sigma * BR * \it{eff}$*|*Simulation*| 
  |\ttbar($\ell\nu qq$ + $\ell\nu\ell\nu$)| MC@NLO+JIMMY| 3327021| 202.86| GEANT4 |
 | \ttbar($qqqqbb$)| MC@NLO+JIMMY| 3685781| 170.74| ATLFAST2 |
 | Single top ($Wt$ + tchan)| AcerMC| 14281| 55.53 | GEANT4 |
 | QCD bb $(35<p_{T}<70)$| ALPGEN+JIMMY| 70000| 7522.42 | ATLFAST2 |
 | QCD bb $(70<p_{T}<140)$| ALPGEN+JIMMY| 289999| 29119.15 | ATLFAST2 |
  |QCD bb $(140<p_{T}<280)$| ALPGEN+JIMMY| 45000| 4384.20 | ATLFAST2 |
  |QCD bb $(p_T>280)$| ALPGEN+JIMMY| 57467| 186.80 | ATLFAST2 |
  |QCD udsc $(35<p_{T}<70)$| ALPGEN+JIMMY| 2827992| 375056.88 | ATLFAST2 |
  |QCD udsc $(70<p_{T}<140)$| ALPGEN+JIMMY| 1390216| 1193879.82 | ATLFAST2 |
  |QCD udsc $(140<p_{T}<280)$| ALPGEN+JIMMY| 1821843| 182230.10 | ATLFAST2 |
  |QCD udsc $(p_T>280)$| ALPGEN+JIMMY| 1938961| 7210.30 | ATLFAST2  |
 | $W \rightarrow e\nu$ + jets| ALPGEN+JIMMY| 3110747| 13249.00 | ATLFAST2 |
 |$W \rightarrow \mu\nu$ + jets| ALPGEN+JIMMY| 1635166| 13237.30| ATLFAST2|
| $W \rightarrow \tau\nu$ + jets| ALPGEN+JIMMY| 2113632| 13233.00| ATLFAST2 |
 |\Zboson \rarrow ee + jets| ALPGEN+JIMMY| 635835| 1206.10| ATLFAST2  |
 | \Zboson \rarrow $\mu\mu$ + jets| ALPGEN+JIMMY| 605000| 1204.20| ATLFAST2  |
  |\Zboson \rarrow $\nu\nu$ + jets| ALPGEN+JIMMY| 2399496| 7056.30 | ATLFAST2 |
  |\Zboson \rarrow $\tau\tau$ + jets| ALPGEN+JIMMY| 566498| 1211.00| ATLFAST2  |
  |$WW$| gg2WW +JIMMY| 52391| 0.28 | GEANT4 |
  |\Wminus\Zboson| MC@NLO+JIMMY| 16807| 21.75 | GEANT4  |
  |\Wplus\Wminus| MC@NLO+JIMMY| 41108| 7.14| GEANT4  |
  |\Wplus\Zboson| MC@NLO+JIMMY| 7286| 37.28| GEANT4 |
 |\Zboson\Zboson| MC@NLO+JIMMY| 13456| 18.41 | GEANT4 |
 


Table2 : Summary of Standard Model datasets used in this analysis. The QCD samples are subdivided according to the $p_T$ (GeV) of the leading jet and the type of quark produced. $N_{events}$ is the sum of MC weights, i.e. weight = \pm1$ for events produced with the MC@NLO generator. The cross section reduced by the branching ratio and the
generator level filter efficiency is $\sigma * BR * eff.


*Table3*: 

The number of background and SU4 events for the plots Figure 3-5 can be found here:
[[%ATTACHURL%/number_of_events.txt][number_of_events.txt]]
 

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Topic attachments
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gif	MSSM_prejudice_M_stop.gif	r1	manage	10.8 K	2009-08-27 - 09:28	JanetDietrich
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Topic revision: r6 - 2010-11-29 - PascalPRALAVORIO

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