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Search for new phenomena in dijet events using 37 fb$^{-1}$ of $pp$ collision data collected at $\sqrt{s}=$13 TeV with the ATLAS detector

The ATLAS collaboration
No Journal Information, 2017

Abstract
Dijet events are studied in the proton--proton collision dataset recorded at $\sqrt{s}=$13 TeV with the ATLAS detector at the Large Hadron Collider in 2015 and 2016, corresponding to integrated luminosities of 3.5 fb$^{-1}$ and 33.5 fb$^{-1}$ respectively. Invariant mass and angular distributions are compared to background predictions and no significant deviation is observed. For resonance searches, a new method for fitting the background component of the invariant mass distribution is employed. The dataset is then used to set upper limits at a 95% confidence level on a range of new physics scenarios. Excited quarks with masses below 6.0 TeV are excluded, and limits are set on quantum black holes, heavy W' bosons, W* bosons, and a range of masses and couplings in a Z' dark matter mediator model. Model-independent limits on signals with a Gaussian shape are also set, using a new approach allowing factorization of physics and detector effects. From the angular distributions, a scale of new physics in contact interaction models is excluded for scenarios with either constructive or destructive interference. These results represent a substantial improvement over those obtained previously with lower integrated luminosity.

  • Table 1

    Data from Figure 1a on page 5 of preprint

    10.17182/hepdata.77265.v2/t1

    The number of events as a function of the dijet invariant mass, compared to background prediction from fit and corresponding...

  • Table 2

    Data from Figure 1b on page 5 of preprint

    10.17182/hepdata.77265.v2/t2

    The number of events as a function of the dijet invariant mass, compared to background prediction from fit and corresponding...

  • Table 3

    Data from Figure 2 on page 8 of preprint

    10.17182/hepdata.77265.v2/t3

    The number of events normalized to bin width as a function of the chi angular separation between the two jets,...

  • Table 4

    Data from Figure 2 on page 8 of preprint

    10.17182/hepdata.77265.v2/t4

    The number of events normalized to bin width as a function of the chi angular separation between the two jets,...

  • Table 5

    Data from Figure 2 on page 8 of preprint

    10.17182/hepdata.77265.v2/t5

    The number of events normalized to bin width as a function of the chi angular separation between the two jets,...

  • Table 6

    Data from Figure 2 on page 8 of preprint

    10.17182/hepdata.77265.v2/t6

    The number of events normalized to bin width as a function of the chi angular separation between the two jets,...

  • Table 7

    Data from Figure 2 on page 8 of preprint

    10.17182/hepdata.77265.v2/t7

    The number of events normalized to bin width as a function of the chi angular separation between the two jets,...

  • Table 8

    Data from Figure 2 on page 8 of preprint

    10.17182/hepdata.77265.v2/t8

    The number of events normalized to bin width as a function of the chi angular separation between the two jets,...

  • Table 9

    Data from Figure 2 on page 8 of preprint

    10.17182/hepdata.77265.v2/t9

    The number of events normalized to bin width as a function of the chi angular separation between the two jets,...

Version 2 modifications: The error in the largest bin in chi has been correct for several mass bins

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