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Search for massive resonances in dijet systems containing jets tagged as W or Z boson decays in pp collisions at $ \sqrt{s} $ = 8 TeV

The CMS collaboration
JHEP 1408 (2014) 173, 2014

Abstract (data abstract)
CERN-LHC. A search is reported for massive resonances decaying into a quark and a vector boson (W or Z), or two vector bosons (WW, WZ, or ZZ). The analysis is performed on an inclusive sample of multijet events corresponding to an integrated luminosity of 19.7 inverse femtobarns, collected in proton-proton collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC. The search uses novel jet-substructure identification techniques that provide sensitivity to the presence of highly boosted vector bosons decaying into a pair of quarks. Exclusion limits are set at a confidence level of 95% on the production of: (i) excited quark resonances q* decaying to qW and qZ for masses less than 3.2 TeV and 2.9 TeV, respectively, (ii) a Randall-Sundrum graviton G[RS] decaying into WW for masses below 1.2 TeV, and (iii) a heavy partner of the W boson W' decaying into WZ for masses less than 1.7 TeV. For the first time mass limits are set on W' to WZ and G[RS] to WW in the all-jets final state. The mass limits on q* to qW, q* to qZ, W' to WZ, G[RS] to WW are the most stringent to date. A model with a "bulk" graviton G[Bulk] that decays into WW or ZZ bosons is also studied. The data are provide for double W/Z tagged bihs: HIGH purity and LOW purity. The data driven background is also provided with 1 sigma PLUS and MINUS uncertainties. Those are the only uncertainties to be applied on the background. The statistical uncertainties on data can be derived from the number of events using your preferred approximation. A tar file contains: data in root format with background ucnertainties. Root files with Signal shapes corresponding to different hypotheses: W'-->WZ, Bulk Graviton-->WW, Bulk Graviton-->ZZ, RS Graviton --> WW, RS Graviton --> ZZ. The difference between Bulk Graviton and RS Graviton is the vector boson polarization: Longitudinal for Bulk Graviton and Transverse for RS Graviton. The number of events in those files are normalized assuming production cross section times branching fraction of 1 fb.

  • Table 1

    Data from Figure 4 right

    10.17182/hepdata.2348.v1/t1

    DATA - Double W/Z tagged events in HIGH purity bin.

  • Table 2

    Data from Figure 4 right

    10.17182/hepdata.2348.v1/t2

    BACKGROUND - Double W/Z tagged background in HIGH purity bin estimated from a fit to data.

  • Table 3

    Data from Figure 4 right

    10.17182/hepdata.2348.v1/t3

    BACKGROUND PLUS - Double W/Z tagged background variation upward (1 sigma) in HIGH purity bin estimated from a fit to...

  • Table 4

    Data from Figure 4 right

    10.17182/hepdata.2348.v1/t4

    BACKGROUND MINUS - Double W/Z tagged background variation downward (1 sigma) in HIGH purity bin estimated from a fit to...

  • Table 5

    Data from Figure 4 right

    10.17182/hepdata.2348.v1/t5

    DATA - Double W/Z tagged events in LOW purity bin.

  • Table 6

    Data from Figure 4 right

    10.17182/hepdata.2348.v1/t6

    BACKGROUND - Double W/Z tagged background in LOW purity bin estimated from a fit to data.

  • Table 7

    Data from Figure 4 right

    10.17182/hepdata.2348.v1/t7

    BACKGROUND PLUS - Double W/Z tagged background variation upward (1 sigma) in LOW purity bin estimated from a fit to...

  • Table 8

    Data from Figure 4 right

    10.17182/hepdata.2348.v1/t8

    BACKGROUND MINUS - Double W/Z tagged background variation downward (1 sigma) in LOW purity bin estimated from a fit to...

  • Table 9

    Data from Figure 7 bottom, Figure 8

    10.17182/hepdata.2348.v1/t9

    Observed and expected 95% CL exclusions on the mass of various resonances.

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