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Search for pair production of supersymmetric top quarks in dilepton events from pp¯ collisions at vs=1.96TeV

Abstract: We present the results of a search for pair production of the supersymmetric partner of the top quark (the top squark ?t1) decaying to a b quark and a chargino ??±1 with a subsequent ??±1 decay into a neutralino ??01, lepton ?, and neutrino ?. Using a data sample corresponding to 2.7??fb?1 of integrated luminosity of p¯p collisions at ?s=1.96??TeV collected by the CDF II detector, we reconstruct the mass of top squark candidate events and fit the observed mass spectrum to a combination of standard model processes and ?t1¯?t1 signal. We find no evidence for ?t1¯?t1 production and set 95% C.L. limits on the masses of the top squark and the neutralino for several values of the chargino mass and the branching ratio B(??±1???01?±?).

 Autoría: Aaltonen T., Adelman J., Akimoto T., Álvarez González B., Amerio S., Amidei D., Anastassov A., Annovi A., Antos J., Apollinari G., Apresyan A., Arisawa T., Artikov A., Ashmanskas W., Attal A., Aurisano A., Azfar F., Badgett W., Barbaro-Galtieri A., Barnes V.E., Barnett B.A., Barria P., Bartsch V., Bauer G., Beauchemin P.H., Bedeschi F., Beecher D., Behari S., Bellettini G., Bellinger J., Benjamin D., Beretvas A., Beringer J., Bhat

 Fuente: Physical Review Letters, 2010, 104, 251801

 Editorial: American Physical Society

 Año de publicación: 2010

 Nº de páginas: 8

 Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevLett.104.251801

 ISSN: 0031-9007,1079-7114

 Url de la publicación: https://doi.org/10.1103/PhysRevLett.104.251801

Autoría

AALTONEN, T.

BARBARA ALVAREZ GONZALEZ

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO