Search for Higgs boson pair production in the γγbb¯ final state with 13 TeV pp collision data collected by the ATLAS experiment

0519569 - FZÚ 2020 RIV US eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2917 authors
Search for Higgs boson pair production in the γγbb¯ final state with 13 TeV pp collision data collected by the ATLAS experiment.
Journal of High Energy Physics. Roč. 2018, č. 11 (2018), s. 1-44, č. článku 40. ISSN 1029-8479. E-ISSN 1029-8479
R&D Projects: GA MŠMT LM2015058
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * CERN Lab * mass spectrum: two-photon * mass dependence * Higgs particle: coupling
OECD category: Particles and field physics
Impact factor: 5.833, year: 2018
Method of publishing: Open access

A search is performed for resonant and non-resonant Higgs boson pair production in the upgammaupgammabb¯¯ final state. The data set used corresponds to an integrated luminosity of 36.1 fb−1 of proton-proton collisions at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. No significant excess relative to the Standard Model expectation is observed. The observed limit on the non-resonant Higgs boson pair cross-section is 0.73 pb at 95% confidence level. This observed limit is equivalent to 22 times the predicted Standard Model cross-section. The Higgs boson self-coupling (κλ = λHHH/λSMHHH ) is constrained at 95% confidence level to −8.2< κλ<13.2. For resonant Higgs boson pair production through X→HH→upgammaupgammabb¯¯ , the limit is presented, using the narrow-width approximation, as a function of mX in the range 260 GeV<mX<1000 GeV. The observed limits range from 1.1 pb to 0.12 pb over this mass range

Permanent Link: http://hdl.handle.net/11104/0304565