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Search for top squarks decaying to tau sleptons in pp collisions at root s=13 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0001-6945-1916
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
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Number of Authors: 28642018 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 98, no 3, article id 032008Article in journal (Refereed) Published
Abstract [en]

A search for direct pair production of top squarks in final states with two tau leptons, b-jets, and missing transverse momentum is presented. The analysis is based on proton-proton collision data at root s = 13 TeV corresponding to an integrated luminosity of 36.1 fb(-1) recorded with the ATLAS detector at the Large Hadron Collider in 2015 and 2016. Two exclusive channels with either two hadronically decaying tau leptons or one hadronically and one leptonically decaying tau lepton are considered. No significant deviation from the Standard Model predictions is observed in the data. The analysis results are interpreted in terms of model-independent limits and used to derive exclusion limits on the masses of the top squark (t) over tilde (1) and the tau slepton (tau) over tilde (1) in a simplified model of supersymmetry with a nearly massless gravitino. In this model, masses up to m((t) over tilde (1)) = 1.16 TeV and m ((tau) over tilde (1)) = 1.00 TeV are excluded at 95% confidence level.

Place, publisher, year, edition, pages
American Physical Society, 2018. Vol. 98, no 3, article id 032008
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Astronomy, Astrophysics and Cosmology
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URN: urn:nbn:se:kth:diva-235289DOI: 10.1103/PhysRevD.98.032008ISI: 000441858000001Scopus ID: 2-s2.0-85053000553OAI: oai:DiVA.org:kth-235289DiVA, id: diva2:1249714
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QC 20180920

Available from: 2018-09-20 Created: 2018-09-20 Last updated: 2019-08-07Bibliographically approved

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Kastanas, Konstatinos A.Lund-Jensen, BengtOhm, ChristianRipellino, GiuliaSidebo, P. EdvinStrandberg, Jonas

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Particle and Astroparticle Physics
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Physical Review D: covering particles, fields, gravitation, and cosmology
Astronomy, Astrophysics and Cosmology

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