Montréal Joint High Energy Physics seminar

Search for Technicolor Particle at D0

Lorenzo Feligioni

Boston University

A study of eν + bQ production, where Q = b, c-quark, at DZero using e+jets events in 388 pb^-1 of integrated luminosity is presented. We select events with b-quark jets by identifying secondary vertices in the jets. Our findings are interpreted in terms of limits on the production of particles predicted by extended technicolor models and in particular for the production decay chain ρ_T → W(->eν)+π_T. In the absence of an excess over standard model background, we compute a 95% C.L. upper limit on the techniparticle production cross section for the ρ_T mass range: 190 GeV/c² <= m(ρ_T) <= 220 GeV/c².