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Search for low-mass resonances decaying into two jets and produced in association with a photon using pp collisions root s=13 TeV with the ATLAS detector
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
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Number of Authors: 29182019 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 795, p. 56-75Article in journal (Refereed) Published
Abstract [en]

A search is performed for localised excesses in dijet mass distributions of low-dijet-mass events produced in association with a high transverse energy photon. The search uses up to 79.8 fb(-1) of LHC proton-proton collisions collected by the ATLAS experiment at a centre-of-mass energy of 13 TeV during 2015-2017. Two variants are presented: one which makes no jet flavour requirements and one which requires both jets to be tagged as b-jets. The observed mass distributions are consistent with multi-jet processes in the Standard Model. The data are used to set upper limits on the production cross-section for a benchmark Z' model and, separately, on generic Gaussian-shape contributions to the mass distributions, extending the current ATLAS constraints on dijet resonances to the mass range between 225 and 1100 GeV.

Place, publisher, year, edition, pages
2019. Vol. 795, p. 56-75
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Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-171950DOI: 10.1016/j.physletb.2019.03.067ISI: 000477924000009OAI: oai:DiVA.org:su-171950DiVA, id: diva2:1350889
Available from: 2019-09-12 Created: 2019-09-12 Last updated: 2019-12-10Bibliographically approved

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Backman, FilipBertoli, GabrieleBohm, ChristianCarney, Rebecca M. D.Clement, ChristopheHellman, StenJon-And, KerstinKastanas, AlexandrosMilstead, David A.Moa, TorbjörnPasuwan, PatrawanShaikh, Nabila W.Silverstein, Samuel B.Sjölin, JörgenStrandberg, SaraUghetto, MichaëlValdés Santurio, EduardoWallängen, Veronica
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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