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

Aaboud, M.Albert, JustinChiu, Y. H.Elliot, Alison A.Fincke-Keeler, J.Hamano, KenjiHill, Ewan ChinKeeler, RichardKowalewski, RobertKuwertz, E. S.Kwan, TonyLeBlanc, Matthew EdgarLefebvre, MichelMcPherson, Robert A.Seuster, RolfSobie, Randall J.Trovatelli, M.Venturi, M.et al.ATLAS Collaboration2020-01-202020-01-2020172017Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Abeloos, B.; … & Zwalinski, L. (2017). Search for new phenomena in dijet events using 37 fb−1 of pp collision data collected at √s=13 TeV with the ATLAS detector. Physical Review D, 96(5), article 52004. DOI: 10.1103/PhysRevD.96.052004https://doi.org/10.1103/PhysRevD.96.052004http://hdl.handle.net/1828/11498Dijet 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.enHadron-hadron interactionsHadronic decaysHypothetical particle physics modelsQuark & gluon jetsSearch for new phenomena in dijet events using 37 fb^−1 of pp collision data collected at √s=13 TeV with the ATLAS detectorArticleDepartment of Physics and Astronomy