dc.contributor.author | Aaboud, Morad | |
dc.contributor.author | Aad, Georges | |
dc.contributor.author | Abbott, Brad | |
dc.contributor.author | Abbott, Dale C. | |
dc.contributor.author | Abdinov, Ovsat Bahram oglu | |
dc.contributor.author | Abhayasinghe, Deshan Kavishka | |
dc.contributor.author | Abidi, Syed Haider | |
dc.contributor.author | Abolins, Maris | |
dc.contributor.author | AbouZeid, Hass | |
dc.contributor.author | Abraham, Nadine L. | |
dc.contributor.author | Buanes, Trygve | |
dc.contributor.author | Djuvsland, Julia Isabell | |
dc.contributor.author | Eigen, Gerald | |
dc.contributor.author | Fomin, Nikolai | |
dc.contributor.author | Lipniacka, Anna | |
dc.contributor.author | Martin dit Latour, Bertrand | |
dc.contributor.author | Mæland, Steffen | |
dc.contributor.author | Stugu, Bjarne | |
dc.contributor.author | Yang, Zongchang | |
dc.contributor.author | Bugge, Magnar Kopangen | |
dc.contributor.author | Cameron, David Gordon | |
dc.contributor.author | Catmore, James Richard | |
dc.contributor.author | Feigl, Simon | |
dc.contributor.author | Franconi, Laura | |
dc.contributor.author | Garonne, Vincent | |
dc.contributor.author | Gramstad, Eirik | |
dc.contributor.author | Hellesund, Simen | |
dc.contributor.author | Morisbak, Vanja | |
dc.contributor.author | Oppen, Henrik | |
dc.contributor.author | Ould-Saada, Farid | |
dc.contributor.author | Pedersen, Maiken | |
dc.contributor.author | Read, Alexander Lincoln | |
dc.contributor.author | Røhne, Ole Myren | |
dc.contributor.author | Sandaker, Heidi | |
dc.contributor.author | Serfon, Cédric | |
dc.contributor.author | Stapnes, Steinar | |
dc.contributor.author | Vadla, Knut Oddvar Høie | |
dc.contributor.author | Abramowicz, Halina | |
dc.contributor.author | Abreu, Henso | |
dc.contributor.author | Abulaiti, Yiming | |
dc.contributor.author | Acharya, Bobby S. | |
dc.contributor.author | Adachi, Shunsuke | |
dc.contributor.author | Adam, Lennart | |
dc.contributor.author | Adamczyk, Leszek | |
dc.contributor.author | Adamek, Lukas | |
dc.contributor.author | Adelman, Jareed | |
dc.contributor.author | Adersberger, Michael | |
dc.contributor.author | Adigüzel, Aytül | |
dc.contributor.author | Adye, Tim | |
dc.contributor.author | Affolder, Anthony Allen | |
dc.contributor.author | ATLAS, Collaboration | |
dc.date.accessioned | 2020-06-26T08:41:11Z | |
dc.date.available | 2020-06-26T08:41:11Z | |
dc.date.issued | 2019-05-21 | |
dc.Published | Aaboud M, Aad G, Abbott B, Abbott DC, Abdinov OBo, Abhayasinghe DK, et al., ATLAS C. Search for top-quark decays t → Hq with 36 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics (JHEP). 2019;2019:123 | eng |
dc.identifier.issn | 1029-8479 | en_US |
dc.identifier.issn | 1126-6708 | en_US |
dc.identifier.uri | https://hdl.handle.net/1956/23031 | |
dc.description.abstract | A search for flavour-changing neutral current decays of a top quark into an up-type quark (q = u, c) and the Standard Model Higgs boson, t → Hq, is presented. The search is based on a dataset of pp collisions at √s = 13 TeV recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider and corresponding to an integrated luminosity of 36.1 fb^−1. Two complementary analyses are performed to search for top-quark pair events in which one top quark decays into Wb and the other top quark decays into Hq, and target the H→bb¯ and H → τ^+τ^− decay modes, respectively. The high multiplicity of b-quark jets, or the presence of hadronically decaying τ-leptons, is exploited in the two analyses respectively. Multivariate techniques are used to separate the signal from the background, which is dominated by top-quark pair production. No significant excess of events above the background expectation is found, and 95% CL upper limits on the t → Hq branching ratios are derived. The combination of these searches with ATLAS searches in diphoton and multilepton final states yields observed (expected) 95% CL upper limits on the t → Hc and t → Hu branching ratios of 1.1 × 10^−3 (8.3 × 10^−4) and 1.2 × 10^−3 (8.3 × 10^−4), respectively. The corresponding combined observed (expected) upper limits on the |λtcH| and |λtuH| couplings are 0.064 (0.055) and 0.066 (0.055), respectively. | en_US |
dc.language.iso | eng | eng |
dc.publisher | Springer | en_US |
dc.rights | Attribution CC BY | eng |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | eng |
dc.subject | Hadron-Hadron scattering (experiments) | eng |
dc.subject | Rare decay | eng |
dc.subject | Top physics | eng |
dc.title | Search for top-quark decays t → Hq with 36 fb−1 of pp collision data at √s = 13 TeV with the ATLAS detector | en_US |
dc.type | Peer reviewed | |
dc.type | Journal article | |
dc.date.updated | 2019-11-26T10:01:32Z | |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2019 CERN, for the benefit of the ATLAS Collaboration | en_US |
dc.identifier.doi | https://doi.org/10.1007/jhep05(2019)123 | |
dc.identifier.cristin | 1705602 | |
dc.source.journal | Journal of High Energy Physics (JHEP) | |
dc.subject.nsi | VDP::Matematikk og naturvitenskap: 400::Fysikk: 430::Kjerne- og elementærpartikkelfysikk: 431 | |
dc.subject.nsi | VDP::Mathematics and natural scienses: 400::Physics: 430::Nuclear and elementary particle physics: 431 | |