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Evidence for t¯t? production and measurement of ?t¯t?/?t¯t

Abstract: Using data corresponding to 6.0??fb?1 of p¯p collisions at ?s=1.96??TeV collected by the CDF II detector, we present a cross section measurement of top-quark pair production with an additional radiated photon in the central region with 10 GeV or more of transverse energy t¯t?. The events are selected by looking for a lepton ( ? or ?), a photon (?), significant transverse momentum imbalance (E?T), large total transverse energy, and three or more jets, with at least one identified as containing a b quark (b). Using an event selection optimized for the t¯t? candidate sample, we also measure the cross section of t¯t (?t¯t). We measure the t¯t? cross section (?tt?) to be 0.18±0.08??pb, and the ratio of ?t¯t? to ?t¯t to be 0.024±0.009. We observe a probability of 0.0015 (3.0 standard deviations) of the background (non-t¯t? events alone producing 30 events or more.

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

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

 Fuente: Physical Review D - Particles, Fields, Gravitation and Cosmology, 2011, 84(3), 031104(R)

Editorial: American Physical Society

 Fecha de publicación: 01/08/2011

Nº de páginas: 9

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevD.84.031104

ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

Url de la publicación: https://doi.org/10.1103/PhysRevD.84.031104