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Search for a heavy particle decaying to a top quark and a light quark in pp¯ collisions at vs=1.96TeV

Abstract: We present a search for a new heavy particle X produced in association with a top quark, p¯p?t(X?¯tq) or p¯p?¯t(¯¯¯X?t¯q), 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 ¯t+j or t+j resonance in t¯t+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 (p¯p?Xt or ¯¯¯X¯t) 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.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Aaltonen T., Adelman J., Álvarez González B., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Appel J.A., Arisawa T., Artikov A., Asaadi J., Ashmanskas W., Auerbach B., Aurisano A., Azfar F., Badgett W., Bae T., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartos P., Bauce M., Bedeschi F., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Bhatti A., Bisello D., Bizjak I., Bl

 Fuente: Physical Review Letters 108, 211805 (2012)

Editorial: American Physical Society

 Año de publicación: 2012

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.108.211805

ISSN: 0031-9007,1079-7114

Url de la publicación: https://doi.org/10.1103/PhysRevLett.108.211805

Autores/as

AALTONEN, T.

BARBARA ALVAREZ GONZALEZ

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO

JOSE ENRIQUE PALENCIA CORTEZON