Studies of Zγ Production in Association with a High-Mass Dijet System in pp Collisions at √s̅ = 8 TeV with the ATLAS Detector

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Studies of Zγ Production in Association with a High-Mass Dijet System in pp Collisions at √s̅ = 8 TeV with the ATLAS Detector

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Title: Studies of Zγ Production in Association with a High-Mass Dijet System in pp Collisions at √s̅ = 8 TeV with the ATLAS Detector
Author(s):
Aaboud, M.;
Aad, G.;
Abbott, B.;
Abdallah, J.;
Abdinov, O.;
Abeloos, B.;
Abidi, S. H.;
Izen, Joseph M.;
Meirose, Bernhard;
Reeves, Kendall
Date Created: 2017-09-28
Item Type: article
Keywords: Show Keywords
Abstract: Dijet events are studied in the proton-proton collision data set recorded at √s̅ = 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 data set 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.
Publisher: American Physical Society
ISSN: 2470-0010
Source: Physical Review D
Link to Related Resource: http://dx.doi.org/10.1103/PhysRevD.96.052004
Persistent Link: http://hdl.handle.net/10735.1/5725
Bibliographic Citation: Aaboud, M., G. Aad, B. Abbott, J. Abdallah, et al. 2017. "Search for new phenomena in dijet events using 37 fb⁻¹ of pp collision data collected at √s̅ = 13 TeV with the ATLAS detector." Physical Review D 96(5), doi:10.1103/PhysRevD.96.052004
Terms of Use: CC BY 4.0 (Attribution)
©2017 CERN, for the ATLAS Collaboration

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CC BY 4.0 (Attribution) Except where otherwise noted, this item's license is described as CC BY 4.0 (Attribution)