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Search for new phenomena in high-mass diphoton final states using 37 fb(-1) of proton-proton collisions collected at 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: 28772017 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 775, p. 105-125Article in journal (Refereed) Published
Abstract [en]

Searches for new phenomena in high-mass diphoton final states with the ATLAS experiment at the LHC are presented. The analysis is based on pp collision data corresponding to an integrated luminosity of 36.7 fb(-1) at a centre-of-mass energy root s = 13 TeV recorded in 2015 and 2016. Searches are performed for resonances with spin 0, as predicted by theories with an extended Higgs sector, and for resonances with spin 2, using a warped extra-dimension model as a benchmark model, as well as for non-resonant signals, assuming a large extra-dimension scenario. No significant deviation from the Standard Model is observed. Upper limits are placed on the production cross section times branching ratio to two photons as a function of the resonance mass. In addition, lower limits are set on the ultraviolet cutoff scale in the large extra-dimensions model.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 775, p. 105-125
Keywords [en]
Extra Dimensions, Hierarchy, Signals, Model
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-221634DOI: 10.1016/j.physletb.2017.10.039ISI: 000417190700016Scopus ID: 2-s2.0-85034415556OAI: oai:DiVA.org:kth-221634DiVA, id: diva2:1175478
Note

QC 20180118

Available from: 2018-01-18 Created: 2018-01-18 Last updated: 2019-12-19Bibliographically approved

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Lund-Jensen, BengtRipellino, GiuliaSidebo, P. EdvinStrandberg, JonasKastanas, Konstatinos A.

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Particle and Astroparticle Physics
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Physics Letters B
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