Search for s-Channel Single-Top-Quark Production in Events with Missing Energy Plus Jets in p¯p Collisions at vs=1.96??TeV

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URI: http://hdl.handle.net/10902/13856
ISSN: 0031-9007
ISSN: 1079-7114
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Autoría
Aaltonen, Timo Antero; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, GervasioAutoridad Unican; Palencia Cortezón, José Enrique; Ruiz Jimeno, AlbertoAutoridad Unican; Scodellaro, LucaAutoridad Unican; Vilar Cortabitarte, RocíoAutoridad Unican; Vizán García, Jesús ManuelAutoridad Unican
Fecha
2014-06
Derechos
© 2014 American Physical Society
Publicado en
Phys. Rev. Lett. Vol. 112, Num. 23, Pag. 231805 (2014)
Editorial
American Physical Society
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Resumen/Abstract
The first search for single-top-quark production from the exchange of an s-channel virtual W boson using events with an imbalance in the total transverse energy, b-tagged jets, and no identified leptons is presented. Assuming the electroweak production of top quarks of mass 172.5??GeV/c2 in the s channel, a cross section of 1.12+0.61-0.57 (stat+syst) pb with a significance of 1.9 standard deviations is measured. This measurement is combined with the result obtained from events with an imbalance in total transverse momentum, b-tagged jets, and exactly one identified lepton, yielding a cross section of 1.36+0.37-0.32 (stat+syst) pb, with a significance of 4.2 standard deviations.
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