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Search for new phenomena in dijet events using 37 fb(-1) of pp collision data collected at root s=13 TeV with the ATLAS detector
KTH, Skolan för teknikvetenskap (SCI), Fysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
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Rekke forfattare: 28492017 (engelsk)Inngår i: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 96, nr 5, artikkel-id 052004Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Dijet events are studied in the proton-proton collision dataset recorded at root s = 13 TeV with the ATLAS detector at the Large Hadron Collider in 2015 and 2016, corresponding to integrated luminosities of 3.5 fb(-1) and 33.5 fb(-1) respectively. Invariant mass and angular distributions are compared to background predictions and no significant deviation is observed. For resonance searches, a new method for fitting the background component of the invariant mass distribution is employed. The dataset is then used to set upper limits at a 95% confidence level on a range of new physics scenarios. Excited quarks with masses below 6.0 TeV are excluded, and limits are set on quantum black holes, heavy W' bosons, W* bosons, and a range of masses and couplings in a Z' dark matter mediator model. Model-independent limits on signals with a Gaussian shape are also set, using a new approach allowing factorization of physics and detector effects. From the angular distributions, a scale of new physics in contact interaction models is excluded for scenarios with either constructive or destructive interference. These results represent a substantial improvement over those obtained previously with lower integrated luminosity.

sted, utgiver, år, opplag, sider
American Physical Society, 2017. Vol. 96, nr 5, artikkel-id 052004
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Identifikatorer
URN: urn:nbn:se:kth:diva-217300DOI: 10.1103/PhysRevD.96.052004ISI: 000411988800002Scopus ID: 2-s2.0-85031108107OAI: oai:DiVA.org:kth-217300DiVA, id: diva2:1155178
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QC 20171107

Tilgjengelig fra: 2017-11-07 Laget: 2017-11-07 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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Kastanas, KonstatinosLund-Jensen, BengtRipellino, GiuliaSidebo, EdvinStrandberg, Jonas
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Physical Review D: covering particles, fields, gravitation, and cosmology

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