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The Mono-jet Analysis

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Search for New Physics in Mono-jet Final States in pp Collisions

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Abstract

In this chapter a detailed overview of the first Run-2 mono-jet analysis based on data collected during the first year of ATLAS at \(\sqrt{s}=13~\text {TeV}\) is provided (consult also Ref. (Aaboud et al., ATLAS Collaboration, Phys Rev D 94(3):032005, 2016, [1])). The selection criteria, the fitting strategy and the background estimations are addressed as well as the improvements and innovations introduced, which led to a significant improvement in sensitivity with respect to the Run-1 analysis. Finally the systematic uncertainties implemented in a global simultaneous fit are described and the results with the interpretations in the context of DM production, SUSY compressed scenarios and ADD model are presented.

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Notes

  1. 1.

    The ME matching scale is the scale used in the calculations which take into account the overlap between jets from ME and PS.

  2. 2.

    In Eq. (7.5) the source of background \({\text {BG}}_j\) is assumed to have a contribution in \({\text {CR}}_j\) much greater than the one in \({\text {SR}}_k\) (\(N_{{\text {BG}}_j}^{\text {CR}_j} \gg N_{\text {BG}_j}^{\text {SR}_k}\)) and in the eventual other regions.

  3. 3.

    Out-of-time jets refers to jets occurring before or after the triggered collision event.

  4. 4.

    \(\mu _R\) varies the scale for the running strong coupling constant for the underlying hard process.

  5. 5.

    \(\mu _F\) varies the scale used for the PDFs.

  6. 6.

    \(\mu _{QSF}\) varies the scale used for the resummation of soft gluon emission.

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  1. Sapienza University of Rome, Rome, Italy

    Giuliano Gustavino

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  1. Giuliano Gustavino
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Correspondence to Giuliano Gustavino .

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Gustavino, G. (2017). The Mono-jet Analysis. In: Search for New Physics in Mono-jet Final States in pp Collisions . Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-58871-1_7

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