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Title

A search for the Zγ decay mode of the Higgs boson in pp collisions at s=13 TeV with the ATLAS detector

AuthorsATLAS Collaboration; Álvarez Piqueras, D. ; Aparisi Pozo, J.A.; Bailey, A.J.; Cabrera, Susana;; Castillo, F.L.; Castillo Mª Victoria; Cerda Alberich, L.; Costa, María José ; 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; Higón, Emilio ; Lozano Bahilo, José J.; Lacasta Llácer, Carlos ; Mamuzic, Judita; Madaffari, Daniele; Martí García, Salvador ; Miñano Moya, M.; Melini, Davide; Mitsou, Vasiliki A. ; Rodriguez Bosca, S.; Ruiz Martínez, Arantxa ; Rodriguez Rodriguez, D.; Salt, José ; Santra, A; Soldevila, Urmila ; Sánchez Martínez, Javier ; Valero, Alberto ; Valls Ferrer, Juan Antonio ; Vos, Marcel
Issue DateOct-2020
PublisherElsevier BV
CitationPHYSICS LETTERS B 809: 135754 (2020)
AbstractA search for the Zγ decay of the Higgs boson, with Z boson decays into pairs of electrons or muons is presented. The analysis uses proton–proton collision data at s = 13 TeV corresponding to an integrated luminosity of 139 fb recorded by the ATLAS detector at the Large Hadron Collider. The observed data are consistent with the expected background with a p-value of 1.3%. An upper limit at 95% confidence level on the production cross-section times the branching ratio for pp→H→Zγ is set at 3.6 times the Standard Model prediction while 2.6 times is expected in the presence of the Standard Model Higgs boson. The best-fit value for the signal yield normalised to the Standard Model prediction is 2.0 where the statistical component of the uncertainty is dominant.
Publisher version (URL)http://dx.doi.org/10.1016/j.physletb.2020.135754
URIhttp://hdl.handle.net/10261/233399
Identifiersdoi: 10.1016/j.physletb.2020.135754
issn: 0370-2693
Appears in Collections:(IFIC) Artículos
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