Search for new phenomena in dijet events using 37 fb<SUP>-1</SUP> of <i>pp</i> collision data collected at √<i>s</i>=13 TeV with the ATLAS detector



Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2853 more authors) (2017) Search for new phenomena in dijet events using 37 fb<SUP>-1</SUP> of <i>pp</i> collision data collected at √<i>s</i>=13 TeV with the ATLAS detector. PHYSICAL REVIEW D, 96 (5). 052004-.

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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.

Item Type: Article
Additional Information: 42 pages in total, author list starting page 26, 6 figures, 2 tables. Submitted to PRD. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2016-21/
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 06 Nov 2017 11:29
Last Modified: 08 Oct 2023 15:15
DOI: 10.1103/PhysRevD.96.052004
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3011615