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Título: | Search for single production of vector-like quarks decaying into Wb in pp collisions at √s = 13 TeV with the ATLAS detector |
Autor: | Álvarez Piqueras, D. CSIC ORCID; Aparisi Pozo, J.A.; Bailey, A.J.; Barranco, Laura; Cabrera, Susana CSIC ORCID; Castillo, F.L.; Castillo Mª Victoria; Cerda Alberich, L.; Costa, María José CSIC ORCID; Escobar, Carlos CSIC ORCID ; Estrada, Oscar; Ferrer, Antonio CSIC ORCID; Fiorini, L. CSIC ORCID; Fullana, Esteban CSIC ORCID; Fuster, Juan CSIC ORCID; García García, Carmen CSIC ORCID; García Navarro, José Enrique CSIC ORCID; González de la Hoz, Santiago CSIC ORCID CVN; Higón, Emilio CSIC ORCID; Jimenez Pena, Javier; Lacasta Llácer, Carlos CSIC ORCID ; Lozano Bahilo, José J.; Madaffari, Daniele CSIC ORCID; Mamuzic, Judita; Martí García, Salvador; Melini, Davide; Miñano Moya, M.; Mitsou, Vasiliki A. CSIC ORCID ; Rodriguez Bosca, S.; Rodriguez Rodriguez, D. CSIC; Ruiz Martínez, Arantxa CSIC ORCID; Salt, José CSIC ORCID; Santra, A.; Sánchez Martínez, Javier CSIC ORCID; Soldevila, Urmila CSIC ORCID; Valero, Alberto CSIC ORCID; Valls Ferrer, Juan Antonio CSIC ORCID; Vos, Marcel CSIC ORCID; ATLAS Collaboration | Fecha de publicación: | may-2019 | Editor: | Institute of Physics Publishing | Citación: | Journal of High Energy Physics 2019: 164 (2019) | Resumen: | A search for singly produced vector-like quarks Q, where Q can be either a T quark with charge +2/3 or a Y quark with charge −4/3, is performed in proton–proton collision data at a centre-of-mass energy of 13 TeV corresponding to an integrated luminosity of 36.1 fb, recorded with the ATLAS detector at the LHC in 2015 and 2016. The analysis targets Q → Wb decays where the W boson decays leptonically. No significant deviation from the expected Standard Model background is observed. Upper limits are set on the QWb coupling strength and the mixing between the Standard Model sector and a singlet T quark or a Y quark from a (B, Y) doublet or a (T, B, Y) triplet, taking into account the interference effects with the Standard Model background. The upper limits set on the mixing angle are as small as |sin θ| = 0.18 for a singlet T quark of mass 800 GeV, |sin θ| = 0.17 for a Y quark of mass 800 GeV in a (B, Y) doublet model and |sin θ| = 0.16 for a Y quark of mass 800 GeV in a (T, B, Y) triplet model. Within a (B, Y) doublet model, the limits set on the mixing parameter |sin θ| are comparable with the exclusion limits from electroweak precision observables in the mass range between about 900 GeV and 1250 GeV.[Figure not available: see fulltext.] | URI: | http://hdl.handle.net/10261/194985 | DOI: | 10.1007/JHEP05(2019)164 | Identificadores: | doi: 10.1007/JHEP05(2019)164 issn: 1029-8479 |
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67_ATLAS_Article_SearchForSingleProductionOfVec(2).pdf | 1,1 MB | Adobe PDF | Visualizar/Abrir |
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