Jul 16 – 22, 2009
Kraków, Poland
Europe/Warsaw timezone

Observation of Single Top Quark Production with the D0 Detector

Jul 16, 2009, 4:45 PM
Middle Lecture Hall A (Kraków, Poland)

Middle Lecture Hall A

Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Standard Model Electroweak Physics VII. Standard Model Electroweak Physics


Prof. Reinhard Schwienhorst (Michigan State University) Reinhard Schwienhorst (Michigan State University)


We report first observation of the electroweak production of single top quarks in ppbar collisions at sqrt(s) = 1.96 TeV based on 2.3 fb^-1 of data collected by the D0 detector at the Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from the fragmentation of b quarks, we measure a cross section of sigma(ppbar -> tb + X, tqb + X) = 3.94 +- 0.88 pb. The probability to measure a cross section at this value or higher in the absence of signal is 2.5 x 10^-7, corresponding to a 5.0 standard deviation significance for the observation.

Primary authors

Reinhard Schwienhorst (Michigan State University) Stefan Soldner-Rembold (University of Manchester)

Presentation materials