Speaker
Marc-Olivier Bettler
(Laboratoire de Physique des Hautes Energies (LPHE-IPEP))
Description
The LHCb experiment will in the first run of LHC obtain more B-meson decays than has been recorded by any other experiment previously. This provides a unique opportunity for studying very rare decays where the effects of physics beyond the Standard Model might be dominating. The decay Bs -> mu+ mu- is very sensitive to an extended Higgs sector and might be the first place to see the effects of New Physics in data from the LHC. We will present the details of the planned analysis and show that an upper limit for the branching ratio can be set right down to the SM prediction with the data expected in the first run. The decays Bs -> phi gamma and Bd -> K*0 mu+ mu- are flavour changing neutral current decays that cannot happen at the tree level. Through the virtual particles in the box and penguin diagrams responsible for the decays, they are sensitive to new particles well into the TeV mass range. The first results on B -> K(*) l+ l- decays from the e+e- B-factories provide some tantalising hints for physics beyond the Standard Model. We will show how LHCb will be able to increase the precision of these measurements by a large factor and thus would be able to provide a clear signature of New Physics from rare decays.
Author
Monica Pepe-Altarelli
(CERN)
