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Limits on the production of the standard model Higgs boson in pp collisions at root s=7 TeV with the ATLAS detector
DESY, D-2000 Hamburg, Germany .
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Partikel- och astropartikelfysik.ORCID-id: 0000-0002-8913-0981
Vise andre og tillknytning
Rekke forfattare: 30192011 (engelsk)Inngår i: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 71, nr 9, s. 1728-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A search for the Standard Model Higgs boson at the Large Hadron Collider (LHC) running at a centre-of-mass energy of 7 TeV is reported, based on a total integrated luminosity of up to 40 pb(-1) collected by the ATLAS detector in 2010. Several Higgs boson decay channels: H -> gamma gamma, H -> ZZ(()*()) -> llll, H -> ZZ -> LL nu nu, H -> ZZ -> llqq, H -> WW(()*()) -> l nu l nu and H -> WW -> l nu qq (l is e, mu) are combined in a mass range from 110 GeV to 600 GeV. The highest sensitivity is achieved in the mass range between 160 GeV and 170 GeV, where the expected 95% CL exclusion sensitivity is at Higgs boson production cross sections 2.3 times the Standard Model prediction. Upper limits on the cross section for its production are determined. Models with a fourth generation of heavy leptons and quarks with Standard Model-like couplings to the Higgs boson are also investigated and are excluded at 95% CL for a Higgs boson mass in the range from 140 GeV to 185 GeV.

sted, utgiver, år, opplag, sider
2011. Vol. 71, nr 9, s. 1728-
Emneord [en]
HADRON COLLIDERS, PARTON DISTRIBUTIONS, MASSLESS PARTICLES, NNLO QCD, SEARCH, LHC, TEVATRON, DECAYS
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-48204DOI: 10.1140/epjc/s10052-011-1728-9ISI: 000295527700003Scopus ID: 2-s2.0-81155135869OAI: oai:DiVA.org:kth-48204DiVA, id: diva2:456989
Merknad
QC 20111116. Author count: 3019.Tilgjengelig fra: 2011-11-16 Laget: 2011-11-16 Sist oppdatert: 2017-12-08bibliografisk kontrollert

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