Changes between Version 1 and Version 2 of MissETPlusJets


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Timestamp:
04/06/12 16:33:02 (8 years ago)
Author:
trac
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  • MissETPlusJets

    v1 v2  
    1313===== II. Goal =====
    1414
    15 To check if one could identify models from a specific signature. Imagine the LHC confirms the following signal:<br /><br />p p &gt; missing ET + jets
     15To check if one could identify models from a specific signature. Imagine the LHC confirms the following signal:[[br]][[br]]p p > missing ET + jets
    1616
    1717What could one say from this? We know there would be many different models that would fit into this signature. Therefore, there are a few questions we would like to answer:
     
    2323   * What could we affirm for the invisible particles from thes observables? (For example, the number of particle? The spin? If it is massive or massless?)
    2424
    25 To sumarize, the idea is to go from the signature -----&gt; models, and not the usual other way around!
     25To sumarize, the idea is to go from the signature -----> models, and not the usual other way around!
    2626===== III. Strategy =====
    2727
    2828First, we separe the production of invisible particles into 2 classes: production and decay.
    2929
    30 '''Production''': Pn =&gt; p p &gt; X1 X2 .. Xn + jets (n from the number of invisibles)
     30'''Production''': Pn => p p > X1 X2 .. Xn + jets (n from the number of invisibles)
    3131
    32 '''Decay''': Dn =&gt; p p &gt; Y1 Y2 ... &gt; X1 X2 .. Xn + jets
     32'''Decay''': Dn => p p > Y1 Y2 ... > X1 X2 .. Xn + jets
    3333
    3434being X the invisible particles, and Y the parent particle which will generate the invisible particles.
     
    5252===== V. Organization of the project: models separated into classes =====
    5353
    54 || <p> '''Model''' </p> || <p> '''Signature''' </p> || <p> '''Class''' </p> || <p> '''Mass''' </p> || <p> '''Spin''' </p> ||
    55 || <p>ADD</p> <p>RS</p> <p>MGM</p> || <p>graviton + jets</p> || <p>Pn</p> <p>P1</p> <p>P1</p> || <p>massive</p> <p>massive</p> <p>massless</p> || <p>2</p> <p>2</p> <p>2</p> ||
    56 || <p> </p> <p>Normal</p> <p>SUSY</p> || <p>(squark &gt; neutralino + jet)(squark &gt; neutralino + jet)</p> <p>(squark &gt; neutralino + jets) neutralino</p> || <p>2*D1</p> <p>P1.D1</p> || || 1/2 ||
    57 || <p>SUSY GMSB</p> || <p>(gluino&gt; gravitino+jet) (gluino &gt; gravitino+jet)</p> <p>(gluino&gt; gravitino+jet) gravitino</p> <p>(squark &gt; neutralino+jet) (R-parity violating)</p> <p>squark &gt; (gluino &gt; gravitino+jet) + jet (R-parity violating)</p> <p>neutralino + jets (?)</p> || <p>2*D1</p> <p>P1.D1</p> <p>D1</p> <p>D1</p> <p>P1</p> || <p> </p> || <p>3/2</p> <p>3/2</p> <p>1/2</p> <p>3/2</p> <p>1/2</p> ||
    58 || <p>V` SM-like</p> || <p>V` + jet</p> || <p>P1</p> || <p> </p> || <p>1</p> ||
     54||
     55 
     56'''Model''' </p> || <p> '''Signature''' </p> || <p> '''Class''' </p> || <p> '''Mass''' </p> || <p> '''Spin''' </p> ||
     57||
     58 
     59DD</p> <p>RS</p> <p>MGM</p> || <p>graviton + jets</p> || <p>Pn</p> <p>P1</p> <p>P1</p> || <p>massive</p> <p>massive</p> <p>massless</p> || <p>2</p> <p>2</p> <p>2</p> ||
     60||
     61 
     62</p> <p>Normal</p> <p>SUSY</p> || <p>(squark > neutralino + jet)(squark > neutralino + jet)</p> <p>(squark > neutralino + jets) neutralino</p> || <p>2*D1</p> <p>P1.D1</p> || || 1/2 ||
     63||
     64 
     65USY GMSB</p> || <p>(gluino> gravitino+jet) (gluino > gravitino+jet)</p> <p>(gluino> gravitino+jet) gravitino</p> <p>(squark > neutralino+jet) (R-parity violating)</p> <p>squark > (gluino > gravitino+jet) + jet (R-parity violating)</p> <p>neutralino + jets (?)</p> || <p>2*D1</p> <p>P1.D1</p> <p>D1</p> <p>D1</p> <p>P1</p> || <p> </p> || <p>3/2</p> <p>3/2</p> <p>1/2</p> <p>3/2</p> <p>1/2</p> ||
     66||
     67 
     68` SM-like</p> || <p>V` + jet</p> || <p>P1</p> || <p> </p> || <p>1</p> ||
    5969|| 4F interaction || F + jet || P1 || || 1/2 ||
    6070|| S || S + jet || P1 || || 0 ||
    61 || <p>SM</p> || <p>Z &gt; v vbar + jets</p> || <p>D2</p> || <p> </p> || <p>1/2</p> ||
    62 || 4F + Dark || g q &gt; chi chibar jet || P2 || || 1/2 ||
     71||
     72 
     73M</p> || <p>Z > v vbar + jets</p> || <p>D2</p> || <p> </p> || <p>1/2</p> ||
     74|| 4F + Dark || g q > chi chibar jet || P2 || || 1/2 ||
    6375
    6476* We should take into account the possibility that the accompanying jets are either b's or coming from a top decay (like in the monotop paper).
     
    6981===== VI. Summary of the discussions =====
    7082
    71 <strong>********</strong> 04/11/2011 <strong>********</strong>
     83<strong>********** 04/11/2011 **g>**********
    7284
    73 The idea is to start by Johan's paper (ref [2]), doing the same analysis that they did (as an example) with each of the classes of models given above. They have separated into 4 searches: monojet + missET, dijet + missET, 3jets + missET and &gt;4jets + missET. They have plotted the differential cross section as a function of two varibles: missET and HT. Finally they have summarized their differential cross section results in a grid formed by both variables.
     85The idea is to start by Johan's paper (ref [2]), doing the same analysis that they did (as an example) with each of the classes of models given above. They have separated into 4 searches: monojet + missET, dijet + missET, 3jets + missET and >4jets + missET. They have plotted the differential cross section as a function of two varibles: missET and HT. Finally they have summarized their differential cross section results in a grid formed by both variables.
    7486
    7587(1) The choice of variables