Search for new phenomena in dijet events using 37  fb−1 of pp collision data collected at √s=13  TeV with the ATLAS detector. / The ATLAS Collaboration.

In: Physical Review D, Vol. 96, No. 5, 052004, 28.09.2017, p. 1-26.

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Abstract

Dijet events are studied in the proton-proton collision data set recorded at √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 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.
Original languageEnglish
Article number052004
Pages (from-to)1-26
Number of pages26
JournalPhysical Review D
Volume96
Issue number5
DOIs
Publication statusPublished - 28 Sep 2017
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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