ATLAS Collaboration (Including: Ennis, J. S., Farrington, S. M., Harrison, P. F., Jeske, C., Jones, G. (Graham), Martin, T. A., Murray, W. J., Pianori, E. and Spangenberg, M.). (2016) Search for new phenomena in dijet mass and angular distributions from pp collisions at s=13 TeV with the ATLAS detector. Physics Letters B, 754 . pp. 302-322. doi:10.1016/j.physletb.2016.01.032

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Abstract

This Letter describes a model-agnostic search for pairs of jets (dijets) produced by resonant and non-resonant phenomena beyond the Standard Model in of proton–proton collisions with a centre-of-mass energy of recorded by the ATLAS detector at the Large Hadron Collider. The distribution of the invariant mass of the two leading jets is examined for local excesses above a data-derived estimate of the smoothly falling prediction of the Standard Model. The data are also compared to a Monte Carlo simulation of Standard Model angular distributions derived from the rapidity of the two jets. No evidence of anomalous phenomena is observed in the data, which are used to exclude, at 95% CL, quantum black holes with threshold masses below 8.3 TeV, 8.1 TeV, or in three different benchmark scenarios; resonance masses below 5.2 TeV for excited quarks, 2.6 TeV in a model, a range of masses starting from and couplings from in a model; and contact interactions with a compositeness scale below 12.0 TeV and 17.5 TeV respectively for destructive and constructive interference between the new interaction and QCD processes. These results significantly extend the ATLAS limits obtained from 8 TeV data. Gaussian-shaped contributions to the mass distribution are also excluded if the effective cross-section exceeds values ranging from approximately 50–300 fb for masses below 2 TeV to 2–20 fb for masses above 4 TeV.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Particles (Nuclear physics), Proton-antiproton colliders, Proton-proton interactions, Jets (Nuclear physics)
Journal or Publication Title:	Physics Letters B
Publisher:	Elsevier Science BV
ISSN:	0370-2693
Official Date:	10 March 2016
Dates:	Date Event 10 March 2016 Published 20 January 2016 Available 18 January 2016 Accepted
Volume:	754
Page Range:	pp. 302-322
DOI:	10.1016/j.physletb.2016.01.032
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Open Access
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