INVESTIGADORES
OTERO Y GARZON Gustavo Javier
artículos
Título:
Evidence for Production of Single Top Quarks and First Direct Measurement of jVtbj
Autor/es:
GUSTAVO OTERO Y GARZON, THE DZERO COLLABORATION
Revista:
PHYSICAL REVIEW LETTERS
Referencias:
Año: 2007 p. 1818021 - 1818027
ISSN:
0031-9007
Resumen:
The D0 Collaboration presents first evidence for the production of single top quarks at the FermilabTevatron pp collider. Using a 0:9 fb1 dataset, we apply a multivariate analysis to separate signal frombackground and measure pp ! tb X; tqb X 4:9 1:4 pb. The probability to measure a crosssection at this value or higher in the absence of a signal is 0:035%, corresponding to a 3.4 standarddeviation significance. We use the cross section measurement to directly determine the Cabibbo-Kobayashi-Maskawa matrix element that describes the Wtb coupling and find 0:68 < jVtbj 1 at 95%C.L. within the standard model.
