Higgs boson production cross-section measurements and their EFT interpretation in the 4 ℓ decay channel at √s= 13 TeV with the ATLAS detector

Higgs boson properties are studied in the four-lepton decay channel (where lepton = e, μ) using 139 fb of proton–proton collision data recorded at s=13 TeV by the ATLAS experiment at the Large Hadron Collider. The inclusive cross-section times branching ratio for H→ ZZ decay is measured to be 1.34 ±...

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Detalles Bibliográficos
Autores: ATLAS Collaboration, Aparisi Pozo, J.A., Bailey, A.J., Cabrera, Susana, Castillo, F.L., Castillo Gimenez, M. V., Costa, M. J., Escobar, Carlos, Estrada, Oscar, Ferrer, Antonio, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Madaffari, Daniele, Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Mitsou, Vasiliki A., Moreno Llácer, María, Poveda, Joaquín, Rodriguez Bosca, S., Ruiz-Martinez, A., Salt, José, Santra, A., Sayago Galvan, Ivan, Soldevila, U., Sánchez Martínez, Javier, Valero, Alberto, Valls Ferrer, Juan Antonio, Vos, M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/230035
Acceso en línea:http://hdl.handle.net/10261/230035
Access Level:acceso abierto
Palabra clave:ddc:530
Descripción
Sumario:Higgs boson properties are studied in the four-lepton decay channel (where lepton = e, μ) using 139 fb of proton–proton collision data recorded at s=13 TeV by the ATLAS experiment at the Large Hadron Collider. The inclusive cross-section times branching ratio for H→ ZZ decay is measured to be 1.34 ± 0.12 pb for a Higgs boson with absolute rapidity below 2.5, in good agreement with the Standard Model prediction of 1.33 ± 0.08 pb. Cross-sections times branching ratio are measured for the main Higgs boson production modes in several exclusive phase-space regions. The measurements are interpreted in terms of coupling modifiers and of the tensor structure of Higgs boson interactions using an effective field theory approach. Exclusion limits are set on the CP-even and CP-odd ‘beyond the Standard Model’ couplings of the Higgs boson to vector bosons, gluons and top quarks.