Recent Results on CP violation from the DØ Experiment
- Event time: 1:00pm until 2:00pm
- Event date: 7th March 2008
- Speaker: Guennadi Borissov (Lancaster University)
- Location: Room 6301, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
The Standard Model, although very successful in describing all experimental results in particle physics, is not able to explain the apparent asymmetry between matter and antimatter in the Universe. Additional CP violation effects, produced by the new physics contribution beyond the Standard Model, are required to explain this asymmetry, and one of the main task of the current and future experiments is to identify and study them. The DØ experiment at Fermilab performs the search for these new CP violation effects in the decays of B mesons. In this talk I present the latest results of the DØ experiment in this subject, with the main emphasis on the new measurement of the CP violation phase in the BS mixing, obtained from the study of BS → J/ψ φ decay. We obtain the most precise value of this phase: ϕS = −0.57 +0.24 −0.30(stat) +0.07 −0.02 (syst).
The experimental particle physics seminar series invites speakers from all over Europe to discuss the latest developments at the LHC, accelerator and non-accelerator based neutrino physics, hardware R&D and astroparticle physics. .