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    Search for a Heavy Particle Decaying to a Top Quark and a Light Quark in pp̅ Collisions at √s=1.96  TeV

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    Identificadores
    URI: http://hdl.handle.net/10902/1768
    DOI: 10.1103/PhysRevLett.108.211805
    ISSN: 1079-7114
    ISSN: 0031-9007
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    Author
    Aaltonen, Timo Antero; Adelman, Jahred; Álvarez González, Bárbara; Amerio, Silvia; Amidei, Dante; Anastassov, Anton; Annovi, Alberto; Antos, Jaroslav; Apollinari, Giorgio; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, Gervasio; Palencia Cortezón, José Enrique; Rodrigo Anoro, TeresaAutoridad Unican; Ruiz Jimeno, AlbertoAutoridad Unican; Scodellaro, Luca; Vila Alvarez, Ivan; Vilar Cortabitarte, RocíoAutoridad Unican; Vizán García, Jesús ManuelAutoridad Unican; [et al.]
    Date
    2012-05-25
    Derechos
    © 2012 American Physical Society
    Publicado en
    Physical review letters, vol. 108, isu. 21, article number 211805, (2012)
    Publisher
    American Physical Society
    Enlace a la publicación
    http://dx.doi.org/10.1103/PhysRevLett.108.211805
    Abstract:
    We present a search for a new heavy particle X produced in association with a top quark, pp̅ →t(X→t̅ q) or pp̅ →t̅ (X̅ →tq̅ ), where q stands for up quarks and down quarks. Such a particle may explain the recent anomalous measurements of top-quark forward-backward asymmetry. If the light-flavor quark (q) is reconstructed as a jet (j), this gives a t̅ +j or t+j resonance in tt̅ +jet events, a previously unexplored experimental signature. In a sample of events with exactly one lepton, missing transverse momentum and at least five jets, corresponding to an integrated luminosity of 8.7  fb-1 collected by the CDF II detector, we find the data to be consistent with the standard model. We set cross-section upper limits on the production (pp̅ →Xt or X̅ t̅ ) at 95% confidence level from 0.61 pb to 0.02 pb for X masses ranging from 200  GeV/c2 to 800  GeV/c2, respectively.
    Collections to which it belong
    • D15 Artículos [447]
    • D52 Artículos [713]

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    UNIVERSIDAD DE CANTABRIA

    Repositorio realizado por la Biblioteca Universitaria utilizando DSpace software
    Contact Us | Send Feedback
    Metadatos sujetos a:licencia de Creative Commons Reconocimiento 3.0 España