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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
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8015-7512
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-5935-7464
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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
Elsevier, 2019. Vol. 795, p. 56-75
Keywords [en]
PROTON-PROTON COLLISIONS; DIJET MASS; ANGULAR-DISTRIBUTIONS; FB(-1)
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-262886DOI: 10.1016/j.physletb.2019.03.067ISI: 000477924000009Scopus ID: 2-s2.0-85066862895OAI: oai:DiVA.org:kth-262886DiVA, id: diva2:1363354
Note

QC 20191022

Available from: 2019-10-22 Created: 2019-10-22 Last updated: 2019-10-22Bibliographically approved

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Lund-Jensen, B.Ohm, C. C.Ripellino, G.Sidebo, P. E.Strandberg, J.

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