Search for physics beyond the standard model in events with tau leptons in the presence of multijets and large momentum imbalance in pp collisions at √s= 7 TeV.

Susy_decay.png

Abstract

A search for physics beyond the standard model is performed with one or more hadronically decaying τ-leptons, highly energetic jets and large momentum imbalance in the final state. The data sample corresponds to an integrated luminosity of 4.98 fb-1 of pp collisions at √s = 7 TeV collected with the CMS detector at the LHC. The number of observed events is consistent with data-driven predictions for standard model processes. In the absence of any evidence of supersymmetry, upper limits on the mass of the gluino have been set.

Approved Plots from SUS-12-004 (Click on figure for pdf)

Figure Abbreviated Caption
Figure_001a.pdf Figure 1: (a) dependence of the tauh reconstruction efficiency on the number of additional particles in the isolation cone in bins of tauh pT for the single tauh final state where, NG is the number of photons and NC is the number of charged hadrons.

Figure_001b.pdf Figure 1: (b) dependence of pTtau,gen on the tauh response. Both distributions are derived from a simulated sample of W + jets events.

Figure_002a.pdf Figure 2: (a) Distribution of H50 for the real tauh estimate in W + jets simulated events for the single tauh final state. The black triangles are the simulated events which pass the baseline selection and have a reconstructed tauh matched to the visible part of a generated, hadronically decaying tau-lepton. The filled green area is the prediction obtained from the muon control sample. The hashed area is the total uncertainty on the prediction.

Figure_002b.pdf Figure 2: (b) Distribution of MHT for the real tauh estimate in W + jets simulated events for the single tauh final state. The black triangles are the simulated events which pass the baseline selection and have a reconstructed tauh matched to the visible part of a generated, hadronically decaying tau-lepton. The filled green area is the prediction obtained from the muon control sample. The hashed area is the total uncertainty on the prediction.

Figure_003a.pdf Figure 3: (a) jet -->tauh misidentification rates in simulation (colored markers) and data (dark markers) as a function of pTjet for events with H50T > 350 GeV and 40 < MHT < 60 GeV.

Figure_003b.pdf Figure 3 (b) MHT distribution for the tauh misidentification rate estimated in simulated events with H50T > 350 GeV, where the black dots represent the events which pass the baseline selection, the filled blue area shows the predicted events and the hashed area shows the total uncertainty on the prediction. These distributions correspond to the single tauh final state.

Figure_004a.pdf Data-MC comparison for the tauh tauh final state.

Figure 4 (a) pT distribution of the tauh candidate in the ttbar CR.

Figure_004b.pdf Data-MC comparison for the tauh tauh final state.

Figure 4 (b) MHT distribution in the Z(-->mu, mu) + jets CR which is used to estimate the number of Z(--> nu, nu) + jets events.

Figure_004c.pdf Data-MC comparison for the tauh tauh final state.

Figure 4 (c) MET distribution in the W + jets CR,

Figure_004d.pdf Data-MC comparison for the tauh tauh final state.

Figure 4 (d) SM background enhanced sample depicting the effectiveness of DeltaPhi(MHT, j2) < 0.10 in selecting a sample where  99% of the events are multijet

Figure_005a.pdf Figure 5: (a) Distribution of H50T for the single tauh final state. The black dots represent the events in data which pass the baseline selection while the filled green (light) and filled blue (dark) areas shows the predicted backgrounds due to events containing a real tauh and a misidentified tauh respectively. The hashed area shows the total uncertainty on the prediction.

Figure_005b.pdf Figure 5: (b) Distribution of MHT for the single tauh final state. The black dots represent the events in data which pass the baseline selection while the filled green (light) and filled blue (dark) areas shows the predicted backgrounds due to events containing a real tauh and a misidentified tauh respectively. The hashed area shows the total uncertainty on the prediction.

Figure_006a.pdf Figure 6: (a) Distribution of H30T in the SR in the case of the tauh, tauh final state. The background distributions are taken from MC normalized to the data-driven predictions over the full region; the MC shapes are not known to be well modeled.

Figure_006b.pdf Figure 6: (b) Distribution of H30T + MHT in the SR in the case of the tauh, tauh final state. The background distributions are taken from MC normalized to the data-driven predictions over the full region; the MC shapes are not known to be well modeled.

Figure_007a.pdf Figure 7: (a) Exclusion limits in the cMSSM plane at tan β = 40 for the single tauh final state. The observed and expected limits are shown by the solid red and blue lines respectively. The bands represent the experimental uncertainties while the dotted lines represent the theoretical uncertainties for events passing the full selection.

Figure_007b.pdf Figure 7: (b) Exclusion limit in the cMSSM plane at tan β = 40 for the tauh, tauh final state. The central red line denotes the experimental limit while the dotted red lines represent the uncertainty on the experimental limit due to scale variations (a factor of 2) and PDF effects on the theoretical cross sections.

Figure_008.pdf Figure 8: Feynman diagram for the T3tauh SMS model.

Figure_009a.pdf SMS exclusion limits are shown for the tauh, tauh final state.

Figure 9 (a) 95% CL cross section upper limits for the T3tauh model where the solid red line represents the limits on the mass of the gluino and the LSP.

Figure_009b.pdf GMSB exclusion limits are shown for the tauh, tauh final state.

Figure 9 (b) 95% CL cross section upper limits as a function of gluino mass in the GMSB scenario.

Estimated and observed background in single tauh.(click to get .png)

Table 1: The estimated (predicted) and observed (selected) background contributions for simulated events with a real tauh passing the baseline and full selection in the single tauh final state. The reconstructed tauh is required to match the visible part of the generated, hadronically decaying tau-lepton. The predictions are derived from the muon control sample and the events are normalized to 4.98 fb-1.

Percentage of multijet events in MHT in single tauh.(click to get .png)

Table 2: The percentage of multijet events in the MHT binned samples for different multijet dominated regions in the single tauh final state is shown. This is used to test the background estimation method due to a misidentified tauh. The ratio of selected events over predicted events is shown to be statistically compatible to one and the ratio is stable over the multijet dominated range of 60 < MHT < 100 GeV (in the case of data, the ratio of selected/predicted = 1.07 ± 0.21).

Signal and background in single tauh.(click to get .png)

Table 3: Number of observed data events and estimated background rates in the single tauh final state.

Signal and background in di-tauh.(click to get .png)

Table 4: Number of observed data events and estimated background rates in the tauh, tauh final state.

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng EvD_01.png r1 manage 62.0 K 2012-06-14 - 09:27 RoyJoaquinMontalvo  
PNGpng EvD_02.png r1 manage 176.7 K 2012-06-14 - 09:27 RoyJoaquinMontalvo  
PNGpng EvD_03.png r1 manage 145.2 K 2012-06-14 - 09:27 RoyJoaquinMontalvo  
PNGpng EvD_04.png r1 manage 141.6 K 2012-06-14 - 09:27 RoyJoaquinMontalvo  
PDFpdf Figure_001a.pdf r1 manage 11.5 K 2012-06-14 - 07:42 FriederikeNowak  
PNGpng Figure_001a.png r1 manage 88.4 K 2012-06-14 - 07:42 FriederikeNowak  
PDFpdf Figure_001b.pdf r3 r2 r1 manage 9.9 K 2012-06-19 - 07:53 FriederikeNowak  
PNGpng Figure_001b.png r3 r2 r1 manage 73.8 K 2012-06-19 - 07:53 FriederikeNowak  
PDFpdf Figure_002a.pdf r3 r2 r1 manage 9.7 K 2012-06-27 - 16:20 FriederikeNowak  
PNGpng Figure_002a.png r3 r2 r1 manage 65.2 K 2012-06-27 - 16:20 FriederikeNowak  
PDFpdf Figure_002b.pdf r3 r2 r1 manage 10.2 K 2012-06-27 - 16:20 FriederikeNowak  
PNGpng Figure_002b.png r3 r2 r1 manage 67.6 K 2012-06-27 - 16:20 FriederikeNowak  
PDFpdf Figure_003a.pdf r3 r2 r1 manage 10.3 K 2012-06-28 - 12:06 SinjiniSengupta  
PNGpng Figure_003a.png r3 r2 r1 manage 39.0 K 2012-06-28 - 12:08 SinjiniSengupta  
PDFpdf Figure_003b.pdf r3 r2 r1 manage 10.0 K 2012-06-28 - 12:03 SinjiniSengupta  
PNGpng Figure_003b.png r3 r2 r1 manage 60.5 K 2012-06-27 - 16:20 FriederikeNowak  
PDFpdf Figure_004a.pdf r10 r9 r8 r7 r6 manage 19.3 K 2012-06-19 - 01:42 RoyJoaquinMontalvo  
PNGpng Figure_004a.png r10 r9 r8 r7 r6 manage 19.2 K 2012-06-19 - 01:42 RoyJoaquinMontalvo  
PDFpdf Figure_004b.pdf r3 r2 r1 manage 18.7 K 2012-06-19 - 01:42 RoyJoaquinMontalvo  
PNGpng Figure_004b.png r3 r2 r1 manage 18.2 K 2012-06-19 - 01:42 RoyJoaquinMontalvo  
PDFpdf Figure_004c.pdf r8 r7 r6 r5 r4 manage 18.3 K 2012-06-19 - 01:42 RoyJoaquinMontalvo  
PNGpng Figure_004c.png r7 r6 r5 r4 r3 manage 18.4 K 2012-06-19 - 01:42 RoyJoaquinMontalvo  
PDFpdf Figure_004d.pdf r7 r6 r5 r4 r3 manage 19.5 K 2012-06-19 - 01:42 RoyJoaquinMontalvo  
PNGpng Figure_004d.png r7 r6 r5 r4 r3 manage 18.8 K 2012-06-19 - 01:42 RoyJoaquinMontalvo  
PDFpdf Figure_005a.pdf r3 r2 r1 manage 12.5 K 2012-06-15 - 14:21 FriederikeNowak  
PNGpng Figure_005a.png r3 r2 r1 manage 82.2 K 2012-06-15 - 14:21 FriederikeNowak  
PDFpdf Figure_005b.pdf r5 r4 r3 r2 r1 manage 13.2 K 2012-07-02 - 07:41 FriederikeNowak  
PNGpng Figure_005b.png r5 r4 r3 r2 r1 manage 118.3 K 2012-07-02 - 07:39 FriederikeNowak  
PDFpdf Figure_006a.pdf r4 r3 r2 r1 manage 17.0 K 2012-06-18 - 16:15 RoyJoaquinMontalvo  
PNGpng Figure_006a.png r4 r3 r2 r1 manage 17.0 K 2012-06-18 - 16:14 RoyJoaquinMontalvo  
PDFpdf Figure_006b.pdf r3 r2 r1 manage 17.0 K 2012-06-17 - 04:17 RoyJoaquinMontalvo  
PNGpng Figure_006b.png r3 r2 r1 manage 17.0 K 2012-06-17 - 04:17 RoyJoaquinMontalvo  
PDFpdf Figure_007.pdf r3 r2 r1 manage 39.6 K 2012-06-18 - 14:49 SinjiniSengupta  
PNGpng Figure_007.png r4 r3 r2 r1 manage 76.3 K 2012-06-18 - 14:54 SinjiniSengupta  
PDFpdf Figure_007a.pdf r1 manage 39.6 K 2012-06-22 - 21:57 SinjiniSengupta  
PDFpdf Figure_007b.pdf r1 manage 38.8 K 2012-06-22 - 21:58 SinjiniSengupta  
PDFpdf Figure_008.pdf r4 r3 r2 r1 manage 9.4 K 2012-06-22 - 21:59 SinjiniSengupta  
PNGpng Figure_008.png r3 r2 r1 manage 80.7 K 2012-06-18 - 14:55 SinjiniSengupta  
PDFpdf Figure_009.pdf r1 manage 9.4 K 2012-06-13 - 23:02 RoyJoaquinMontalvo  
PNGpng Figure_009.png r1 manage 12.1 K 2012-06-13 - 23:29 RoyJoaquinMontalvo  
PDFpdf Figure_009a.pdf r1 manage 14.2 K 2012-06-22 - 21:48 SinjiniSengupta  
PNGpng Figure_009a.png r1 manage 37.6 K 2012-06-22 - 21:56 SinjiniSengupta  
PDFpdf Figure_009b.pdf r1 manage 15.1 K 2012-06-22 - 21:49 SinjiniSengupta  
PDFpdf Figure_010a.pdf r3 r2 r1 manage 13.9 K 2012-06-16 - 00:42 RoyJoaquinMontalvo  
PNGpng Figure_010a.png r3 r2 r1 manage 31.9 K 2012-06-22 - 21:53 SinjiniSengupta  
PDFpdf Figure_010b.pdf r4 r3 r2 r1 manage 15.1 K 2012-06-16 - 00:42 RoyJoaquinMontalvo  
PNGpng Figure_010b.png r4 r3 r2 r1 manage 40.9 K 2012-06-16 - 00:42 RoyJoaquinMontalvo  
PDFpdf SMSlimit_06222012.pdf r1 manage 14.2 K 2012-06-22 - 21:30 AlfredoGurrola  
PNGpng Susy_decay.png r1 manage 164.2 K 2012-06-14 - 18:19 RoyJoaquinMontalvo  
PNGpng Table_01.png r4 r3 r2 r1 manage 33.5 K 2012-07-01 - 23:38 RoyJoaquinMontalvo  
PNGpng Table_02.png r2 r1 manage 65.2 K 2012-06-14 - 08:11 RoyJoaquinMontalvo  
PNGpng Table_03.png r2 r1 manage 39.6 K 2012-06-14 - 08:11 RoyJoaquinMontalvo  
PNGpng Table_04.png r2 r1 manage 53.8 K 2012-06-14 - 08:11 RoyJoaquinMontalvo  
Edit | Attach | Watch | Print version | History: r36 | r34 < r33 < r32 < r31 | Backlinks | Raw View | Raw edit | More topic actions...
Topic revision: r32 - 2012-07-02 - FriederikeNowak
 
    • Cern Search Icon Cern Search
    • TWiki Search Icon TWiki Search
    • Google Search Icon Google Search

    CMSPublic All webs login

This site is powered by the TWiki collaboration platform Powered by PerlCopyright & 2008-2020 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
or Ideas, requests, problems regarding TWiki? use Discourse or Send feedback