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Vista/Sleuth Global Search for New Physics in p-pbar Collisions at sqrt(s)=1.96 TeV
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Data collected in Run II of the Fermilab Tevatron are searched for indications of new electroweak scale physics. Rather than focusing on particular new physics scenarios, CDF data are analyzed for discrepancies with Standard Model prediction.
A model-independent approach (Vista) considers the gross features of the data, and is sensitive to new large cross section physics. A quasi-model-independent approach (Sleuth) emphasizes the high-&Sigma pT tails, and is particularly sensitive to new electroweak scale physics.
This global search for new physics in 927 pb-1 of p-pbar collisions at sqrt(s)=1.96 TeV reveals no indication of physics beyond the Standard Model.
Vista plots and tables:
Sleuth plots and tables:
 | Illustration of available Vista information EPS GIF |
 | Vista summary of final state populations EPS GIF |
 | Graphical summary of Vista final state population discrepancies No final state shows a significant population discrepancy, after accounting for the trials factor EPS GIF |
 | Graphical summary of Vista kinematic variable distribution discrepancies Interest is focused on the outliers, representing distributions with significant discrepancy However, after analysis, none of these discrepant distributions motivate a new physics claim EPS GIF |
 | Vista W production: missing pT EPS GIF |
 | Vista Z production: e+ pT EPS GIF |
 | Vista electron-jet final state: M(e,j) EPS GIF |
 | Vista photon-jet final state: photon pT EPS GIF |
 | Vista muon-jet final state: muon pT EPS GIF |
 | Vista muon-jet final state: muon pseudorapidity (eta) EPS GIF |
 | Vista tau-jet final state: tau pT EPS GIF |
 | Vista t-tbar lepton+jets with a b-tag: top quark mass EPS GIF |
 | Vista jet-missing ET final state: jet azimuthal angle EPS GIF |
 | Vista 3j1tau final state: mass(tau,j1,j2) The distribution with the most discrepant shape found in the Vista final state with the largest population discrepancy EPS GIF |
 | Vista 3j final state: deltaR(j2,j3) Significant discrepancy seen - parton shower parameters being investigated EPS GIF |
 | Vista 3j final state: mass(j2,j3) Significant discrepancy seen - parton shower parameters being investigated EPS GIF |
 | Vista Z production: unclustered pT Pythia Tune AW used to describe Z pT... EPS GIF |
 | Vista 2j final state: unclustered pT ... but simultaneously describing intrinsic kT in all final states is difficult EPS GIF |
 | Vista 1b1e+1j final state: deltaR(b,j) This comes from the production of 3 jets in which one jet is misreconstructed as a b and one as an electron. The imprint of the 3j deltaR(j2,j3) is seen clearly in this fnal state, in this plot. EPS GIF |
 | Vista b+jet final state: b pT EPS GIF |
 | Vista b+jet final state: j pT EPS GIF |
 | Vista b+jet final state: Mass(b) EPS GIF |
 | Vista b+jet final state: Mass(j) EPS GIF |
 | Vista b+jet final state: deltaR(j,b) EPS GIF |
 | Vista b+2 jets final state: deltaR(j2,b) Similar effect to 3j final state EPS GIF |
 | Vista jet+missing energy final state: j pT EPS GIF |
 | Vista jet+missing energy final state: missing pT EPS GIF |
 | Vista correction factor definitions Values and errors obtained from global fit to data These are only applicable within the context of the Vista correction model EPS GIF |
 | Vista correction factor constraints EPS GIF |
 | Vista mis-identification correction factor values EPS GIF |
 | Vista trigger correction factor values EPS GIF |
 | Single-particle gun study EPS GIF |
 | Single-particle gun study EPS GIF |
 | Summary of Sleuth's result No final state shows a significant excess in the sumPt distribution that could indicate the presence of new physics EPS GIF |
 | Observed distribution of scriptP from all Sleuth final states (data) The deviation from a uniform distribution illustrates the known remaining imperfections in the correction model used to obtain the SM estimate Conglomeration around 0 (1) indicates probable under(over)-estimation of the SM background in these final states EPS GIF |
 | Observed distribution of scriptP from all Sleuth final states (data) Same as above, but in a Gaussian mapping to reveal values closer to 0 and 1 EPS GIF |
 | Sleuth #1 discrepant final state EPS GIF |
 | Same as above, with log scale in the inset EPS GIF |
 | Sleuth #2 discrepant final state EPS GIF |
 | Same as above, with log scale in the inset EPS GIF |
 | Sleuth #3 discrepant final state EPS GIF |
 | Sleuth #4 discrepant final state EPS GIF |
 | Sleuth #5 discrepant final state EPS GIF |
 | Sleuth sensitivity to some specific new physics models EPS GIF |
 | Sleuth sensitivity to some specific new physics models, compared to dedicated searches (where available) Sleuth's sensitivity is seen to be broadly comparable to that of dedicated analyses when the signal satisfies Sleuth's basic assumptions EPS GIF |
 | Sleuth final state containing t-tbar to lepton+jets with 1 b-tag EPS GIF |
 | Sleuth final state containing t-tbar to lepton+jets with 1 b-tag after removing t-tbar from SM, and re-fitting Vista correction factors Sleuth easily 'discovers' t-tbar when it is removed from SM EPS GIF |
 | Sleuth final state containing t-tbar to dileptons (different flavour) with 1 b-tag EPS GIF |
 | Sleuth final state containing t-tbar to dileptons (different flavour) with 1 b-tag after removing t-tbar from SM, and re-fitting Vista correction factors Sleuth easily 'discovers' t-tbar when it is removed from SM EPS GIF |
 | Sleuth final state containing t-tbar to dileptons (same flavour) with 1 b-tag EPS GIF |
 | Sleuth final state containing t-tbar to dileptons (same flavour) with 1 b-tag after removing t-tbar from SM, and re-fitting Vista correction factors Sleuth easily 'discovers' t-tbar when it is removed from SM EPS GIF |
 | Sleuth final state containing WW EPS GIF |
 | Sleuth final state containing WW after removing dibosons from SM and refitting Vista correction factors Sleuth 'discovers' WW when it is removed from SM background EPS GIF |
 | Example sensitivity test pseudo-discovery - GMSB model EPS GIF |
 | TildeScriptP as a function of integrated luminosity, when there is no ttbar in the background. EPS GIF |
 | Effect on tildeScriptP with variation of background scale factor for Sleuth's top 3 most discrepant final states EPS GIF |
 | Transverse (COT) view of the highest sum pT event in the 1bb Sleuth final state. EPS GIF |
 | Transverse (COT) view of highest sum pT event in the 1pmiss Sleuth final state. EPS GIF |
 | Longitudinal (RZ) view of the highest sum pT event in the 1pmiss Sleuth final state. EPS GIF |
 | Zoom on the transverse (COT) view of the track identified as electron (magenta) and its nearest neighbor (red), in the only event with a central electron reconstructed in the 1e+1jj1mu+1pmiss Sleuth final state. It probably is a conversion (&gamma -> ee). EPS GIF |
 | Zoom on the longitudinal (RZ) view of the track identified as electron (magenta) and its nearest neighbor (red), in the only event with a central electron reconstructed in the 1e+1jj1mu+1pmiss Sleuth final state. It probably is a conversion (&gamma -> ee). EPS GIF |
