Publicação
Study of High-Transverse-Momentum Higgs Boson Production in Association with a Vector Boson in the qqbb Final State with the ATLAS Detector
| Resumo: | This Letter presents the first study of Higgs boson production in association with a vector boson (\( V = W \) or \( Z \)) in the fully hadronic \( q \ q \ b \ b \) final state using data recorded by the ATLAS detector at the LHC in proton-proton collisions at \( \sqrt{s} = 13 \ \text{TeV} \) and corresponding to an integrated luminosity of \( 137 \ \text{fb}^{-1} \). The vector bosons and Higgs bosons are each reconstructed as large-radius jets and tagged using jet substructure techniques. Dedicated tagging algorithms exploiting \( b \)-tagging properties are used to identify jets consistent with Higgs bosons decaying into \( b \ \bar{b} \). Dominant backgrounds from multijet production are determined directly from the data, and a likelihood fit to the jet mass distribution of Higgs boson candidates is used to extract the number of signal events. The \( V H \) production cross section is measured inclusively and differentially in several ranges of Higgs boson transverse momentum: 250--450, 450--650, and greater than 650 GeV. The inclusive signal yield relative to the standard model expectation is observed to be \( \mu = 1.4^{+1.0}_{-0.9} \) and the corresponding cross section is \( 3.1 \pm 1.3 \ ( \text{stat} )^{+1.8}_{-1.4} \ ( \text{syst} ) \ \text{pb} \). |
|---|---|
| Autores principais: | Castro, Nuno Filipe |
| Outros Autores: | Onofre, A.; ATLAS Collaboration |
| Assunto: | Ciências Naturais::Ciências Físicas |
| Ano: | 2024 |
| País: | Portugal |
| Tipo de documento: | artigo |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | This Letter presents the first study of Higgs boson production in association with a vector boson (\( V = W \) or \( Z \)) in the fully hadronic \( q \ q \ b \ b \) final state using data recorded by the ATLAS detector at the LHC in proton-proton collisions at \( \sqrt{s} = 13 \ \text{TeV} \) and corresponding to an integrated luminosity of \( 137 \ \text{fb}^{-1} \). The vector bosons and Higgs bosons are each reconstructed as large-radius jets and tagged using jet substructure techniques. Dedicated tagging algorithms exploiting \( b \)-tagging properties are used to identify jets consistent with Higgs bosons decaying into \( b \ \bar{b} \). Dominant backgrounds from multijet production are determined directly from the data, and a likelihood fit to the jet mass distribution of Higgs boson candidates is used to extract the number of signal events. The \( V H \) production cross section is measured inclusively and differentially in several ranges of Higgs boson transverse momentum: 250--450, 450--650, and greater than 650 GeV. The inclusive signal yield relative to the standard model expectation is observed to be \( \mu = 1.4^{+1.0}_{-0.9} \) and the corresponding cross section is \( 3.1 \pm 1.3 \ ( \text{stat} )^{+1.8}_{-1.4} \ ( \text{syst} ) \ \text{pb} \). |
|---|