Publication
Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the $H \rightarrow aa \rightarrow 4b$ channel in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector
| dc.contributor.author | ATLAS collaboration (2921 authors) | |
| dc.contributor.author | Aguilar Saavedra, Juan Antonio | |
| dc.contributor.author | Amor Dos Santos, Susana Patricia | |
| dc.contributor.author | Araque Espinosa, Juan Pedro | |
| dc.contributor.author | Castro, Nuno Filipe | |
| dc.contributor.author | Conde Muino, Patricia | |
| dc.contributor.author | Da Cunha Sargedas De Sousa, Mario Jose | |
| dc.contributor.author | Dias DO Vale, Tiago | |
| dc.contributor.author | Faisca Rodrigues Pereira, Rui Miguel | |
| dc.contributor.author | Fiolhais, Miguel | |
| dc.contributor.author | Galhardo, Bruno | |
| dc.contributor.author | Gomes, Agostinho | |
| dc.contributor.author | Goncalo, Ricardo | |
| dc.contributor.author | Jorge, Pedro | |
| dc.contributor.author | Machado Miguens, Joana | |
| dc.contributor.author | Maio, Amelia | |
| dc.contributor.author | Maneira, Jose | |
| dc.contributor.author | Mendes Gouveia, Emanuel Demetrio | |
| dc.contributor.author | Oleiro Seabra, Luis Filipe | |
| dc.contributor.author | Onofre, Antonio | |
| dc.contributor.author | Costa Batalha Pedro, Rute | |
| dc.contributor.author | Pereira Peixoto, Ana Paula | |
| dc.contributor.author | Santos, Helena | |
| dc.contributor.author | Saraiva, Joao | |
| dc.contributor.author | Silva, Jose Manuel | |
| dc.contributor.author | Tavares Delgado, Ademar | |
| dc.contributor.author | Veloso, Filipe | |
| dc.contributor.author | Wolters, Helmut | |
| dc.date.accessioned | 2019-02-05T16:35:54Z | |
| dc.date.available | 2019-02-05T16:35:54Z | |
| dc.date.issued | 2018-10-04 | |
| dc.date.updated | 2019-02-05T16:35:54Z | |
| dc.description.abstract | A search for exotic decays of the Higgs boson into a pair of spin-zero particles, H → aa, where the a-boson decay sin to b-quarks promptly or with a mean proper lifetime cτ$_{a}$ up to 6 mm and has a mass in the range of 20–60 GeV, is presented. The search is performed in events where the Higgs boson is produced in association with a W or Z boson, giving rise to a signature of one or two charged leptons (electrons or muons) and multiple jets from b-quark decays. The analysis is based on the dataset of proton-proton collisions at $ \sqrt{s}=13 $ TeV recorded in 2015 and 2016 by the ATLAS detector at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 36.1 fb$^{−1}$. No significant excess of events above the Standard Model background prediction is observed, and 95% confidence-level upper limits are derived for the production cross-sections for pp → WH, ZH and their combination, times the branching ratio of the decay chain H → aa → 4b. For a-bosons which decay promptly, the upper limit on the combination of cross-sections for WH and ZH times the branching ratio of H → aa → 4b ranges from 3.0 pb for m$_{a}$ = 20 GeV to 1.3 pb for m$_{a}$ = 60 GeV, assuming that the ratio of WH to ZH cross-sections follows the Standard Model prediction. For a-bosons with longer proper lifetimes, the most stringent limits are 1.8 pb and 0.68 pb, respectively, at cτ$_{a}$ ∼ 0.4 mm. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | JHEP 1810 (2018) 031; DOI 10.1007/JHEP10(2018)031 | |
| dc.identifier.uri | http://dx.doi.org/10.1007/JHEP10(2018)031 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/27670 | |
| dc.language.iso | eng | |
| dc.title | Search for the Higgs boson produced in association with a vector boson and decaying into two spin-zero particles in the $H \rightarrow aa \rightarrow 4b$ channel in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS detector | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |