Publication
Search for a multi-Higgs-boson cascade in $W^+W^−b\bar{b}$ events with the ATLAS detector in pp collisions at $\sqrt{s} = 8$ TeV
| dc.contributor.author | ATLAS collaboration (2935 authors) | |
| dc.contributor.author | Aguilar-Saavedra, Juan Antonio | |
| dc.contributor.author | Amor Dos Santos, Susana Patricia | |
| dc.contributor.author | Anjos, Nuno | |
| dc.contributor.author | Cantrill, Robert | |
| dc.contributor.author | Carvalho, João | |
| dc.contributor.author | Castro, Nuno Filipe | |
| dc.contributor.author | Conde Muiño, Patricia | |
| dc.contributor.author | Costa Batalha Pedro, Rute | |
| dc.contributor.author | Da Cunha Sargedas De Sousa, Mario Jose | |
| dc.contributor.author | Do Valle Wemans, André | |
| dc.contributor.author | Fiolhais, Miguel | |
| dc.contributor.author | Galhardo, Bruno | |
| dc.contributor.author | Gomes, Agostinho | |
| dc.contributor.author | Gonçalo, Ricardo | |
| dc.contributor.author | Jorge, Pedro | |
| dc.contributor.author | Lopes, Lourenco | |
| dc.contributor.author | Machado Miguens, Joana | |
| dc.contributor.author | Maio, Amélia | |
| dc.contributor.author | Maneira, José | |
| dc.contributor.author | Marques, Carlos | |
| dc.contributor.author | Oliveira, Miguel Alfonso | |
| dc.contributor.author | Onofre, António | |
| dc.contributor.author | Palma, Alberto | |
| dc.contributor.author | Pina, João Antonio | |
| dc.contributor.author | Pinto, Belmiro | |
| dc.contributor.author | Santos, Helena | |
| dc.contributor.author | Saraiva, João | |
| dc.contributor.author | Silva, José | |
| dc.contributor.author | Tavares Delgado, Ademar | |
| dc.contributor.author | Veloso, Filipe | |
| dc.contributor.author | Wolters, Helmut | |
| dc.date.accessioned | 2019-02-03T23:51:59Z | |
| dc.date.available | 2019-02-03T23:51:59Z | |
| dc.date.issued | 2014-02-19 | |
| dc.date.updated | 2019-02-03T23:51:59Z | |
| dc.description.abstract | <p>A search is presented for new particles in an extension to the Standard Model that includes a heavy Higgs boson (<inline-formula><mml:math display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math></inline-formula>), an intermediate charged Higgs-boson pair (<inline-formula><mml:math display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math></inline-formula>), and a light Higgs boson (<inline-formula><mml:math display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>h</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math></inline-formula>). The analysis searches for events involving the production of a single heavy neutral Higgs boson which decays to the charged Higgs boson and a <inline-formula><mml:math display="inline"><mml:mrow><mml:mi>W</mml:mi></mml:mrow></mml:math></inline-formula> boson, where the charged Higgs boson subsequently decays into a <inline-formula><mml:math display="inline"><mml:mrow><mml:mi>W</mml:mi></mml:mrow></mml:math></inline-formula> boson and the lightest neutral Higgs boson decaying to a bottom–antibottom-quark pair. Such a cascade results in a <inline-formula><mml:math display="inline"><mml:mrow><mml:mi>W</mml:mi></mml:mrow></mml:math></inline-formula>-boson pair and a bottom–antibottom-quark pair in the final state. Events with exactly one lepton, missing transverse momentum, and at least four jets are selected from a data sample corresponding to an integrated luminosity of <inline-formula><mml:math display="inline"><mml:mrow><mml:mn>20.3</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:msup><mml:mrow><mml:mi>fb</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo><mml:mn>1</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math></inline-formula>, collected by the ATLAS detector in proton-proton collisions at <inline-formula><mml:math display="inline"><mml:mrow><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>8</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>TeV</mml:mi></mml:mrow></mml:math></inline-formula> at the LHC. The data are found to be consistent with Standard Model predictions, and 95% confidence-level upper limits are set on the product of cross section and branching ratio. These limits range from 0.065 to 43 pb as a function of <inline-formula><mml:math display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math></inline-formula> and <inline-formula><mml:math display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>H</mml:mi></mml:mrow><mml:mrow><mml:mo>±</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math></inline-formula> masses, with <inline-formula><mml:math display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>m</mml:mi></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>h</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:msub></mml:mrow></mml:math></inline-formula> fixed at 125 GeV.</p> | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Rev. D89 (2014) 032002; DOI 10.1103/PhysRevD.89.032002 | |
| dc.identifier.uri | http://dx.doi.org/10.1103/PhysRevD.89.032002 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26512 | |
| dc.language.iso | eng | |
| dc.title | Search for a multi-Higgs-boson cascade in $W^+W^−b\bar{b}$ events with the ATLAS detector in pp collisions at $\sqrt{s} = 8$ TeV | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |