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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.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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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
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QC 20180118

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

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Lund-Jensen, BengtRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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