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Search for Higgs boson decays to a photon and a Z boson in pp collisions at root s=7 and 8 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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2014 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 732, p. 8-27Article in journal (Refereed) Published
Abstract [en]

A search is reported for a neutral Higgs boson in the decay channel H -> Z gamma, Z -> l(+)l(-) (l = e, mu), using 4.5 fb(-1) of pp collisions at root s = 7 TeV and 20.3 fb(-1) of pp collisions at root s = 8 TeV, recorded by the ATLAS detector at the CERN Large Hadron Collider. The observed distribution of the invariant mass of the three final-state particles, m(ll gamma), is consistent with the Standard Model hypothesis in the investigated mass range of 120-150 GeV. For a Higgs boson with a mass of 125.5 GeV, the observed upper limit at the 95% confidence level is 11 times the Standard Model expectation. Upper limits are set on the cross section times branching ratio of a neutral Higgs boson with mass in the range 120-150 GeV between 0.13 and 0.5 pb for root s = 8 TeV at 95% confidence level.

Place, publisher, year, edition, pages
2014. Vol. 732, p. 8-27
Keywords [en]
Hadron Colliders, Qcd Corrections, Standard Model, Nnlo Qcd, Lhc
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-146232DOI: 10.1016/j.physletb.2014.03.015ISI: 000335307900002Scopus ID: 2-s2.0-84896477696OAI: oai:DiVA.org:kth-146232DiVA, id: diva2:723064
Funder
EU, European Research CouncilSwedish Research Council
Note

QC 20140610. Author count: 2899.

Available from: 2014-06-10 Created: 2014-06-10 Last updated: 2017-12-05Bibliographically approved

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Strandberg, Jonas

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