Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/22298
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Título : Searching the inclusive l gamma E-T + b-quark signature for radiative top quark decay and non-standard-model processes
Autor : CDF Collaboration, Cabrera, Susana, Cuenca Almenar, Cristóbal, Álvarez González, B., Casal, Bruno, Cuevas, Javier, Gómez, G., Rodrigo, Teresa, Ruiz, Alberto, Scodellaro, Luca, Vila, Iván, Vilar, Rocío, Aaltonen, T.
Fecha de publicación : 30-Jul-2009
Editor: American Physical Society
Resumen: In a search for new phenomena in a signature suppressed in the standard model of elementary particles (SM),we compare the inclusive production of events containing a lepton (l), a photon (gamma), significant transverse momentum imbalance (E-T), and a jet identified as containing a b-quark, to SM predictions. The search uses data produced in proton-antiproton collisions at root sp = 1.96 TeV corresponding to 1.9 fb(-1) of integrated luminosity taken with the CDF detector. We find 28 l gamma E-T events versus an expectation of 31.0(-3.5)(+4.1) events. If we further require events to contain at least three jets and large total transverse energy, the largest SM source is radiative top-quark pair production, t (r) over bar + gamma. In the data we observe 16 t (t) over bar gamma candidate events versus an expectation from SM sources of 11.2(-2.1)(+2.3) Assuming the difference between the observed number and the predicted non-top-quark total of 6.8(-2.0)(+2.2) is due to SM top- quark production, we estimate the t (t) over bart cross section to be 0.15 +/- 0.08 pb.
Versión del editor: http://dx.doi.org/ 10.1103/PhysRevD.80.011102
URI : http://hdl.handle.net/10261/22298
ISSN: 1550-7998
DOI: 10.1103/PhysRevD.80.011102
Citación : Physical Review - Section D - Particles and Fields 80 (1): 011102 (2009)
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