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
2014 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 732, 8-27 p.Article in journal (Refereed) Published
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, 8-27 p.
IdentifiersURN: urn:nbn:se:su:diva-104405DOI: 10.1016/j.physletb.2014.03.015ISI: 000335307900002OAI: oai:DiVA.org:su-104405DiVA: diva2:725433