Search for Higgs and Z boson decays to J/ψγ and ϒ(nS)γ with the ATLAS detector

0454933 - FZÚ 2016 RIV US eng J - Journal Article
Aad, G. - Abbott, B. - Abdallah, J. - Chudoba, Jiří - Havránek, Miroslav - Hejbal, Jiří - Jakoubek, Tomáš - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Vrba, Václav … Total 2825 authors
Search for Higgs and Z boson decays to J/ψγ and ϒ(nS)γ with the ATLAS detector.
Physical Review Letters. Roč. 114, č. 12 (2015), , "121801-1"-"121801-19". ISSN 0031-9007. E-ISSN 1079-7114
R&D Projects: GA MŠMT(CZ) LG13009
Institutional support: RVO:68378271
Keywords : ATLAS * Higgs particle * Z0 * branching ratio * upper limit * CERN LHC Coll
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 7.645, year: 2015

A search for the decays of the Higgs and Z bosons to J/ψγ and ϒ(nS)γ (n=1,2,3) is performed with pp collision data samples corresponding to integrated luminosities of up to 20.3  fb-1 collected at s=8  TeV with the ATLAS detector at the CERN Large Hadron Collider. No significant excess of events is observed above expected backgrounds and 95% C.L. upper limits are placed on the branching fractions. In the J/ψγ final state the limits are 1.5×10-3 and 2.6×10-6 for the Higgs and Z boson decays, respectively, while in the ϒ(1S,2S,3S)γ final states the limits are (1.3,1.9,1.3)×10-3 and (3.4,6.5,5.4)×10-6, respectively.
Permanent Link: http://hdl.handle.net/11104/0255596