Anomalous multi-muon events in CDF

by Tommaso Dorigo (INFN & Universita' di Padova)

Friday 20 Mar 2009, 11:30 → 12:30 Europe/Zurich

Univ. de Geneve, Auditoire 234 (Univ. de Geneve, Auditoire 234)

The CDF collaboration has recently published a study of a large excess of peculiar events produced in 2-TeV proton-antiproton interactions by the Tevatron collider. These events contain several muon candidates, and have kinematical characteristics which are very difficult to explain with known sources. This observation might constitute the first hint of new physics beyond the Standard Model. The excess has been found while trying to resolve a few nagging inconsistencies in Tevatron measurements in the b-quark sector, which have been known since Run I. In the seminar those inconsistencies will be shortly reviewed, and the analysis will be summarized, with emphasis on the investigations of the possible sources of background that contribute to the data.